Physics

  • Article | | open

    The resolution limitations when using the ubiquitous algorithms that process images obtained using modern techniques are not straightforward to define. Here, the authors examine the performance of localization algorithms and use spatial statistics to provide a metric for assessing the resolution limit of such algorithms.

    • Edward A. K. Cohen
    • , Anish V. Abraham
    • , Sreevidhya Ramakrishnan
    •  & Raimund J. Ober
  • Article | | open

    Wide application of quantum dot light emitting diodes (QLED) in display technology is hindered by the poor lifetime of the blue QLEDs. Here, the degradation mechanism is shown to originate from space charge accumulation in the electron-transporting layer enabling improvements in blue QLED lifetimes.

    • Song Chen
    • , Weiran Cao
    • , Taili Liu
    • , Sai-Wing Tsang
    • , Yixing Yang
    • , Xiaolin Yan
    •  & Lei Qian
  • Article | | open

    The mechanism of enhanced superconducting transition temperature (Tc) at the FeSe/SrTiO3 interface remains enigmatic. Here, Song and Yu et al. reveal the evidence of cooperation between intrinsic pairing interaction in FeSe and interfacial electron–phonon coupling to enhance the Tc at the FeSe/SrTiO3 interface.

    • Q. Song
    • , T. L. Yu
    • , X. Lou
    • , B. P. Xie
    • , H. C. Xu
    • , C. H. P. Wen
    • , Q. Yao
    • , S. Y. Zhang
    • , X. T. Zhu
    • , J. D. Guo
    • , R. Peng
    •  & D. L. Feng
  • Article | | open

    Heavy-fermion materials have unusual electronic behavior due to a dual localized-itinerant character of 4f electrons. Here, by studying divalent EuRh2Si2, the authors gain insight into the electronic states of the trivalent heavy fermion system YbRh2Si2 and show that it experimentally demonstrates Luttinger’s theorem.

    • M. Güttler
    • , A. Generalov
    • , S. I. Fujimori
    • , K. Kummer
    • , A. Chikina
    • , S. Seiro
    • , S. Danzenbächer
    • , Yu. M. Koroteev
    • , E. V. Chulkov
    • , M. Radovic
    • , M. Shi
    • , N. C. Plumb
    • , C. Laubschat
    • , J. W. Allen
    • , C. Krellner
    • , C. Geibel
    •  & D. V. Vyalikh
  • Article | | open

    SecB homologs can be associated with stress-responsive type II toxin–antitoxin (TA) systems and form tripartite toxin-antitoxin-chaperone systems (TAC). Here the authors provide structural insights into TACs by presenting the crystal structure of the M. tuberculosis TA-associated SecB chaperone in complex with the C-terminal ChAD (chaperone addiction) extension of the antitoxin HigA1.

    • Valérie Guillet
    • , Patricia Bordes
    • , Cécile Bon
    • , Julien Marcoux
    • , Virginie Gervais
    • , Ambre Julie Sala
    • , Suzana Dos Reis
    • , Nawel Slama
    • , Israel Mares-Mejía
    • , Anne-Marie Cirinesi
    • , Laurent Maveyraud
    • , Pierre Genevaux
    •  & Lionel Mourey
  • Article | | open

    Serine/threonine phosphatases such as PP1 associate with a large array of subunit proteins, such as ASPP (apoptosis-stimulating protein of p53) to achieve selective targeting. Here authors solved the crystal structure of the human ASPP2/PP1 complex and explain how ASPP2 can distinguish between PP1 isoforms.

    • M. Teresa Bertran
    • , Stéphane Mouilleron
    • , Yanxiang Zhou
    • , Rakhi Bajaj
    • , Federico Uliana
    • , Ganesan Senthil Kumar
    • , Audrey van Drogen
    • , Rebecca Lee
    • , Jennifer J. Banerjee
    • , Simon Hauri
    • , Nicola O’Reilly
    • , Matthias Gstaiger
    • , Rebecca Page
    • , Wolfgang Peti
    •  & Nicolas Tapon
  • Article | | open

    Organic cocrystals have interesting properties owing to synergistic effects of the individual components but development of effective growth methods for molecular cocrystals is still in its primary stage. Here the authors demonstrate a sublimation method which allows growing organic cocrystals with controlled morphology.

    • Xin Ye
    • , Yang Liu
    • , Qing Guo
    • , Quanxiang Han
    • , Chao Ge
    • , Shuangyue Cui
    • , Leilei Zhang
    •  & Xutang Tao
  • Article | | open

    Rydberg atoms can be created from photoexcitation of molecules using intense ultrafast laser pulses. Here the authors use a coincidence detection of electrons, ion and excited Rydberg atoms and their energy sharing to reveal the general mechanism of Rydberg state excitation in a dissociating H2 molecule.

    • Wenbin Zhang
    • , Xiaochun Gong
    • , Hui Li
    • , Peifen Lu
    • , Fenghao Sun
    • , Qinying Ji
    • , Kang Lin
    • , Junyang Ma
    • , Hanxiao Li
    • , Junjie Qiang
    • , Feng He
    •  & Jian Wu
  • Article | | open

    To realize efficient optoelectronic devices based on two-dimensional (2D) organic crystals, optimizing the photoelectrical response and growth of these materials at the 2D limit is vital. Here, the authors report enhanced internal photoresponse in large-area 2D crystals using a novel growth method.

    • Min Cao
    • , Cong Zhang
    • , Zhi Cai
    • , Chengcheng Xiao
    • , Xiaosong Chen
    • , Kongyang Yi
    • , Yingguo Yang
    • , Yunhao Lu
    •  & Dacheng Wei
  • Article | | open

    Various physical mechanisms are proposed to explain the heating observed in turbulent astrophysical plasmas. Here, Chen et al. find a signature consistent with one of these mechanisms, electron Landau damping, by applying a field-particle correlation technique to in situ spacecraft data of turbulence in the Earth’s magnetosheath.

    • C. H. K. Chen
    • , K. G. Klein
    •  & G. G. Howes
  • Article | | open

    With ever-growing datasets, it is useful to filter out details and keep only the links that carry the relevant structural information. Here the authors generalize the disparity filter by providing a tolerance parameter that can be used to tune how strict the filter is in the selection of edges to preserve.

    • Riccardo Marcaccioli
    •  & Giacomo Livan
  • Article | | open

    Among its interesting properties, SrTiO3 can show both superconductivity and ferroelectric quantum criticality at low temperatures. Tomioka et al. use La and oxygen-isotope doping to tune electron-doped SrTiO3 to the critical region and observe enhanced superconductivity, suggesting a link between them.

    • Yasuhide Tomioka
    • , Naoki Shirakawa
    • , Keisuke Shibuya
    •  & Isao H. Inoue
  • Article | | open

    The rapid development of halide perovskite light-emitting diodes mainly relies on the optimization of the active layer and charge injection layers. Here Zhang et al. incorporate three-dimensional nanophotonic substrates to enhance light out-coupling and achieve high external quantum efficiency of 17.5%.

    • Qianpeng Zhang
    • , Mohammad Mahdi Tavakoli
    • , Leilei Gu
    • , Daquan Zhang
    • , Lei Tang
    • , Yuan Gao
    • , Ji Guo
    • , Yuanjing Lin
    • , Siu-Fung Leung
    • , Swapnadeep Poddar
    • , Yu Fu
    •  & Zhiyong Fan
  • Article | | open

    Various techniques combine light and ultrasound to study the inside of strongly scattering samples, beyond the reach of purely optical imaging. Here, Katz et al. introduce the acousto-optic transmission matrix framework that allows to control and focus light beyond the acoustic diffraction limit.

    • Ori Katz
    • , François Ramaz
    • , Sylvain Gigan
    •  & Mathias Fink
  • Article | | open

    Pursuing high Curie temperature magnetic insulators has been one of the extensively studied subjects due to their wide appeal for spintronic applications. Here the authors experimentally and theoretically demonstrate a record high Curie temperature over 1000 K in B-site ordered double-perovskite, Sr3OsO6.

    • Yuki K. Wakabayashi
    • , Yoshiharu Krockenberger
    • , Naoto Tsujimoto
    • , Tommy Boykin
    • , Shinji Tsuneyuki
    • , Yoshitaka Taniyasu
    •  & Hideki Yamamoto
  • Article | | open

    Finding new thermoelectric materials that can achieve high performance is vital to realizing the potential of future energy harvesting technology. Here, through computation methods, the authors identify two high-performance full-Heusler thermoelectric compounds with high intrinsic band degeneracy.

    • Jiangang He
    • , Yi Xia
    • , S. Shahab Naghavi
    • , Vidvuds Ozoliņš
    •  & Chris Wolverton
  • Article | | open

    1T’ phases of transition metal dichalcogenides show promise for electrocatalysis, energy storage, and spintronic applications but are difficult to obtain. Here the authors synthesize 1T’ WSe2 few-layered nanosheets by kinetically-controlled colloidal synthesis, and test their electrocatalytic activity.

    • Maria S. Sokolikova
    • , Peter C. Sherrell
    • , Pawel Palczynski
    • , Victoria L. Bemmer
    •  & Cecilia Mattevi
  • Article | | open

    Surface waves on the boundary between a magnetosphere and the surrounding plasma might get trapped by the ionosphere forming an eigenmode. Here, Archer et al. show direct observations of this proposed mechanism at Earth’s magnetosphere by analyzing the response to an isolated fast plasma jet detected by the THEMIS satellites.

    • M. O. Archer
    • , H. Hietala
    • , M. D. Hartinger
    • , F. Plaschke
    •  & V. Angelopoulos
  • Article | | open

    The antitermination factor RfaH adopts two functional states where its C-terminal domain is folded either as an α-helical hairpin or β-barrel. Here the authors employ solution state NMR measurements to show that the C-terminal domain transforms into the β-barrel only upon binding to the elongation complex and refolds back after dissociation.

    • Philipp Konrad Zuber
    • , Kristian Schweimer
    • , Paul Rösch
    • , Irina Artsimovitch
    •  & Stefan H. Knauer
  • Article | | open

    Low dimensional quantum magnetic excitations are intriguing but the experimental realizations are challenging. Here, the authors demonstrate Tomonaga–Luttinger behavior and spinon confinement in rare-earth perovskite YbAlO3 by inelastic neutron scattering measurements.

    • L. S. Wu
    • , S. E. Nikitin
    • , Z. Wang
    • , W. Zhu
    • , C. D. Batista
    • , A. M. Tsvelik
    • , A. M. Samarakoon
    • , D. A. Tennant
    • , M. Brando
    • , L. Vasylechko
    • , M. Frontzek
    • , A. T. Savici
    • , G. Sala
    • , G. Ehlers
    • , A. D. Christianson
    • , M. D. Lumsden
    •  & A. Podlesnyak
  • Article | | open

    The bandgap of mixed-halide perovskites can be continuously tuned by changing the halide ratio, but the crystals have poor photo-stability. Here the authors show that photoinduced phase separation is suppressed when perovskite nanocrystals are embedded in a non-perovskite endotaxial matrix.

    • Xi Wang
    • , Yichuan Ling
    • , Xiujun Lian
    • , Yan Xin
    • , Kamal B. Dhungana
    • , Fernando Perez-Orive
    • , Javon Knox
    • , Zhizhong Chen
    • , Yan Zhou
    • , Drake Beery
    • , Kenneth Hanson
    • , Jian Shi
    • , Shangchao Lin
    •  & Hanwei Gao
  • Article | | open

    Proton doping can induce metal-insulator transitions in rare-earth nickelates, demonstrating the complex interplay between dopants and electronic degrees of freedom. Chen et al. use results on strained films to argue that local proton-induced lattice distortions strongly influence the transition.

    • Jikun Chen
    • , Wei Mao
    • , Binghui Ge
    • , Jiaou Wang
    • , Xinyou Ke
    • , Vei Wang
    • , Yiping Wang
    • , Max Döbeli
    • , Wentong Geng
    • , Hiroyuki Matsuzaki
    • , Jian Shi
    •  & Yong Jiang
  • Article | | open

    Laser fields can be tuned to probe electronic motion in atoms and molecules. Here the authors ionize Na atoms using bichromatic pulses to generate electron wave packets of crescent-shaped and 7-fold rotational symmetry which do not follow the field symmetry but are determined by multiphoton interference.

    • S. Kerbstadt
    • , K. Eickhoff
    • , T. Bayer
    •  & M. Wollenhaupt
  • Article | | open

    Despite remarkable optical properties in lead halide perovskites, spin control in these materials is largely unexplored. Herein Belykh et al. study the coherent spin dynamics of electrons and holes in cesium lead bromide perovskites, and evidence interaction of electron and lattice nuclear spins.

    • Vasilii V. Belykh
    • , Dmitri R. Yakovlev
    • , Mikhail M. Glazov
    • , Philipp S. Grigoryev
    • , Mujtaba Hussain
    • , Janina Rautert
    • , Dmitry N. Dirin
    • , Maksym V. Kovalenko
    •  & Manfred Bayer
  • Article | | open

    The emergence of applications requiring device-to-device interactivity has to the need to develop conducting electrodes with high optical transparency at low radiofrequencies. Here, the authors demonstrate conductive polymer electrodes with high transparency in the MHz-order frequency range.

    • Taehoon Kim
    • , Gwangmook Kim
    • , Hyeohn Kim
    • , Hong-Jib Yoon
    • , Taeseong Kim
    • , Yohan Jun
    • , Tae-Hyun Shin
    • , Shinill Kang
    • , Jinwoo Cheon
    • , Dosik Hwang
    • , Byung-wook Min
    •  & Wooyoung Shim
  • Article | | open

    Electrochromic technology has diverse cutting-edge applications, but it has never been used to overcome the critical problems in the field of surface-enhanced Raman scattering (SERS). Here, the authors demonstrate a generic electrochromic strategy for ensuring the reproducibility and renewability of SERS substrates.

    • Shan Cong
    • , Zhen Wang
    • , Wenbin Gong
    • , Zhigang Chen
    • , Weibang Lu
    • , John R. Lombardi
    •  & Zhigang Zhao
  • Article | | open

    An analog of Alfven waves in plasma with velocity set by magnetic tension has been predicted to appear in elastic turbulence. Here the authors observe elastic Alfven waves in elastic turbulence of polymer solution flow between two obstacles where the velocity is defined by elastic stress.

    • Atul Varshney
    •  & Victor Steinberg
  • Article | | open

    Many 2-Cystein Peroxiredoxins (Prx) can either function as peroxidases or chaperones when exposed to stress. Here the authors present the structures of Leishmania infantum mitochondrial Prx alone and with a bound model client protein, use crosslinking to reveal interaction regions that stabilize the bound client, and provide insights into the mechanism by which Prx’s adopt chaperone activity.

    • Filipa Teixeira
    • , Eric Tse
    • , Helena Castro
    • , Karl A. T. Makepeace
    • , Ben A. Meinen
    • , Christoph H. Borchers
    • , Leslie B. Poole
    • , James C. Bardwell
    • , Ana M. Tomás
    • , Daniel R. Southworth
    •  & Ursula Jakob
  • Article | | open

    Here, the authors integrate an acoustic trap with a compact light sheet fluorescence microscope to provide contactless sample confinement of biological organisms. The application of verapamil and norepinephrine to zebrafish larvae was also studied, and the heartbeat response was monitored with light sheet imaging.

    • Zhengyi Yang
    • , Katy L. H. Cole
    • , Yongqiang Qiu
    • , Ildikó M. L. Somorjai
    • , Philip Wijesinghe
    • , Jonathan Nylk
    • , Sandy Cochran
    • , Gabriel C. Spalding
    • , David A. Lyons
    •  & Kishan Dholakia
  • Article | | open

    Chip-based frequency combs promise many applications, but full integration requires the electrical pump source and the microresonator to be on the same chip. Here, the authors show such integration of a microcomb with < 100 GHz mode spacing without additional filtering cavities or on-chip heaters.

    • Arslan S. Raja
    • , Andrey S. Voloshin
    • , Hairun Guo
    • , Sofya E. Agafonova
    • , Junqiu Liu
    • , Alexander S. Gorodnitskiy
    • , Maxim Karpov
    • , Nikolay G. Pavlov
    • , Erwan Lucas
    • , Ramzil R. Galiev
    • , Artem E. Shitikov
    • , John D. Jost
    • , Michael L. Gorodetsky
    •  & Tobias J. Kippenberg
  • Article | | open

    Highly ordered and compositionally complex ceramics are prone to disordering under irradiation, but exactly how is unclear. Here, the authors use high resolution microscopy to directly image the order-to-disorder phase transformations in Ti3AlC2 into otherwise unattainable solid solutions.

    • Chenxu Wang
    • , Tengfei Yang
    • , Cameron L. Tracy
    • , Chenyang Lu
    • , Hui Zhang
    • , Yong-Jie Hu
    • , Lumin Wang
    • , Liang Qi
    • , Lin Gu
    • , Qing Huang
    • , Jie Zhang
    • , Jingyang Wang
    • , Jianming Xue
    • , Rodney C. Ewing
    •  & Yugang Wang
  • Article | | open

    Many Gram-negative bacteria rely on a type III secretion system (T3SS) for their pathogenicity. Here authors present the cryo-EM structure of the E.coli T3SS ATPase-central stalk complex, which forms a homohexameric, asymmetric pore with different functional states.

    • Dorothy D. Majewski
    • , Liam J. Worrall
    • , Chuan Hong
    • , Claire E. Atkinson
    • , Marija Vuckovic
    • , Nobuhiko Watanabe
    • , Zhiheng Yu
    •  & Natalie C. J. Strynadka
  • Article | | open

    Electrochemical water splitting is promising for sustainable energy, but relies on development of electrocatalysts for hydrogen evolution. Here the authors report nitrogen- and ruthenium-codoped carbon nanowires in which ruthenium atoms in a carbon matrix drive electrocatalysis of hydrogen evolution

    • Bingzhang Lu
    • , Lin Guo
    • , Feng Wu
    • , Yi Peng
    • , Jia En Lu
    • , Tyler J. Smart
    • , Nan Wang
    • , Y. Zou Finfrock
    • , David Morris
    • , Peng Zhang
    • , Ning Li
    • , Peng Gao
    • , Yuan Ping
    •  & Shaowei Chen
  • Article | | open

    Exploring the role of structural defect is essential to understand the exotic quantum spin phenoma in rare earth pyrochlores. Here the authors show oxygen vacancies can stabilise the spin liquid phase and reveal the ferromagnetic ground state when oxygen vacancies are eliminated in Yb2Ti2O7.

    • D. F. Bowman
    • , E. Cemal
    • , T. Lehner
    • , A. R. Wildes
    • , L. Mangin-Thro
    • , G. J. Nilsen
    • , M. J. Gutmann
    • , D. J. Voneshen
    • , D. Prabhakaran
    • , A. T. Boothroyd
    • , D. G. Porter
    • , C. Castelnovo
    • , K. Refson
    •  & J. P. Goff
  • Article | | open

    Electrons in uranium-based materials are often on the border between localised and itinerant behaviour, which can lead to unusual magnetic behaviour. Here the authors combine experiment and theory to show that USb2 may be an unusually high temperature example of a singlet-ground-state magnet.

    • Lin Miao
    • , Rourav Basak
    • , Sheng Ran
    • , Yishuai Xu
    • , Erica Kotta
    • , Haowei He
    • , Jonathan D. Denlinger
    • , Yi-De Chuang
    • , Y. Zhao
    • , Z. Xu
    • , J. W. Lynn
    • , J. R. Jeffries
    • , S. R. Saha
    • , Ioannis Giannakis
    • , Pegor Aynajian
    • , Chang-Jong Kang
    • , Yilin Wang
    • , Gabriel Kotliar
    • , Nicholas P. Butch
    •  & L. Andrew Wray
  • Article | | open

    The FDA approved drug aprepitant is an antagonist of the Neurokinin 1 receptor (NK1R). Here the authors present aprepitant bound NK1R crystal structures and use NMR spectroscopy to gain further insights into the dynamics of aprepitant binding, which is of interest for further drug development.

    • Shuanghong Chen
    • , Mengjie Lu
    • , Dongsheng Liu
    • , Lingyun Yang
    • , Cuiying Yi
    • , Limin Ma
    • , Hui Zhang
    • , Qing Liu
    • , Thomas M. Frimurer
    • , Ming-Wei Wang
    • , Thue W. Schwartz
    • , Raymond C. Stevens
    • , Beili Wu
    • , Kurt Wüthrich
    •  & Qiang Zhao
  • Article | | open

    The authors computationally and experimentally derive the selection rules on polarization, wavelengths, and magnetic damping for non-dissipative аll-optical magnetic recording with femtosecond laser pulses in Co-doped garnet film. The suggested approach is based on a multiple resonant pumping of localized d-electron transitions.

    • A. Stupakiewicz
    • , K. Szerenos
    • , M. D. Davydova
    • , K. A. Zvezdin
    • , A. K. Zvezdin
    • , A. Kirilyuk
    •  & A. V. Kimel
  • Article | | open

    Understanding the fundamental chemistry in Li-O2 battery holds importance to the development of superior energy devices. Here the authors report that the oxygen reduction reaction in Li-O2 battery exhibits negative differential resistance, which can work as an indicator to the reaction pathway.

    • Yoko Hase
    • , Yasuhiro Komori
    • , Takayoshi Kusumoto
    • , Takashi Harada
    • , Juntaro Seki
    • , Tohru Shiga
    • , Kazuhide Kamiya
    •  & Shuji Nakanishi
  • Article | | open

    Epitaxial growth of the two-dimensionally thin material flakes with effective layer number and shape calls for precise control over temperature and carrier gas. Here, authors report controlled epitaxial growth of the second layer vertically for MoS2, WS2, MoWS and MoWSSe compounds by reverse hydrogen gas flow chemical vapor epitaxy.

    • Xiumei Zhang
    • , Haiyan Nan
    • , Shaoqing Xiao
    • , Xi Wan
    • , Xiaofeng Gu
    • , Aijun Du
    • , Zhenhua Ni
    •  & Kostya (Ken) Ostrikov
  • Article | | open

    The intrinsic nature and dynamics of a Bloch point has not been verified so far. Here, Im et al. report the realization and dynamical character of steady-state Bloch points in the magnetic vortex cores in asymmetrically shaped Ni80Fe20 nanodisks.

    • Mi-Young Im
    • , Hee-Sung Han
    • , Min-Seung Jung
    • , Young-Sang Yu
    • , Sooseok Lee
    • , Seongsoo Yoon
    • , Weilun Chao
    • , Peter Fischer
    • , Jung-Il Hong
    •  & Ki-Suk Lee
  • Article | | open

    Electrons hopping in two-dimensional honeycomb lattices possess a valley degree of freedom. Here, the authors observe room-temperature valley Hall transport without any extrinsic symmetry breaking in the non-centrosymmetric monolayer and trilayer MoS2 by purely electronic means, whereas no valley signal is detected for centrosymmetric bilayer MoS2.

    • Zefei Wu
    • , Benjamin T. Zhou
    • , Xiangbin Cai
    • , Patrick Cheung
    • , Gui-Bin Liu
    • , Meizhen Huang
    • , Jiangxiazi Lin
    • , Tianyi Han
    • , Liheng An
    • , Yuanwei Wang
    • , Shuigang Xu
    • , Gen Long
    • , Chun Cheng
    • , Kam Tuen Law
    • , Fan Zhang
    •  & Ning Wang
  • Article | | open

    Quantum sensors can have exceptional properties but the limits on their performance involve nonclassical effects such as quantum backaction. Here the authors show how to mitigate the effects of backaction on the spectral resolution of an NV centre nuclear spin sensor by controlling the measurement strength.

    • Matthias Pfender
    • , Ping Wang
    • , Hitoshi Sumiya
    • , Shinobu Onoda
    • , Wen Yang
    • , Durga Bhaktavatsala Rao Dasari
    • , Philipp Neumann
    • , Xin-Yu Pan
    • , Junichi Isoya
    • , Ren-Bao Liu
    •  & Jörg Wrachtrup
  • Article | | open

    Ferroelectric polymers are key building blocks for flexible electronic devices, but lack functionality and ability to tune their ferroelectric response. Here the authors show a method to introduce functionality in ferroelectric polymers while preserving ferroelectricity and tune the ferroelectric response by incorporating insulating polymer chains.

    • Ivan Terzic
    • , Niels L. Meereboer
    • , Mónica Acuautla
    • , Giuseppe Portale
    •  & Katja Loos
  • Article | | open

    There is growing interest in designing platforms for coherent electron-driven photon sources for hybrid light and electron spectroscopy. Here the authors demonstrate generation of coherent broadband ultrashort light pulses upon electron irradiation to nanostructured gold plated film.

    • Nahid Talebi
    • , Sophie Meuret
    • , Surong Guo
    • , Mario Hentschel
    • , Albert Polman
    • , Harald Giessen
    •  & Peter A. van Aken
  • Article | | open

    It remains challenging on how to selectively control terahertz conductivity at surface from the bulk contribution in topological insulators. Here, Luo et al. discover and manipulate topologically enhanced surface transport due to helical spin structure using mid-infrared and terahertz ultrafast photoexcitations.

    • L. Luo
    • , X. Yang
    • , X. Liu
    • , Z. Liu
    • , C. Vaswani
    • , D. Cheng
    • , M. Mootz
    • , X. Zhao
    • , Y. Yao
    • , C.-Z. Wang
    • , K.-M. Ho
    • , I. E. Perakis
    • , M. Dobrowolska
    • , J. K. Furdyna
    •  & J. Wang
  • Article | | open

    In correlated materials, physical properties depend on orbital occupancy and polarization. Here, a way to control the oxygen coordination via dimensionality of superlattices is presented that results in the change of orbital occupancy by 30%, which is larger than what has been achieved by other methods.

    • Zhaoliang Liao
    • , Elizabeth Skoropata
    • , J. W. Freeland
    • , Er-Jia Guo
    • , Ryan Desautels
    • , Xiang Gao
    • , Changhee Sohn
    • , Ankur Rastogi
    • , T. Zac Ward
    • , Tao Zou
    • , Timothy Charlton
    • , Michael R. Fitzsimmons
    •  & Ho Nyung Lee
  • Article | | open

    Electromagnetic surface waves, derived from Maxwell theory, underpin many optical effects and applications. Here, Bliokh et al. show that surface waves at interfaces between isotropic media have a topological origin described by the non-Hermitian helicity operator and bulk-boundary correspondence.

    • Konstantin Y. Bliokh
    • , Daniel Leykam
    • , Max Lein
    •  & Franco Nori
  • Article | | open

    Pairs of microdisk lasers are one of the most common systems for studying optical PT-symmetry. Here, Lafalce, Zeng et al. study the influence of fabrication imperfections in a disk pair made from colloidal quantum dots and show that the resulting three modes also coalesce at an exceptional point.

    • Evan Lafalce
    • , Qingji Zeng
    • , Chun Hao Lin
    • , Marcus J. Smith
    • , Sidney T. Malak
    • , Jaehan Jung
    • , Young Jun Yoon
    • , Zhiqun Lin
    • , Vladimir V. Tsukruk
    •  & Z. Valy Vardeny
  • Article | | open

    Some retroviruses, including HIV, insert their DNA in a non-random manner in the host genome through a poorly understood selection mechanism. Here the authors develop a biophysical model of retroviral integration, identifying previously unnoticed universal principles that regulate this phenomenon.

    • D. Michieletto
    • , M. Lusic
    • , D. Marenduzzo
    •  & E. Orlandini