Featured
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Review Article |
A second wave of topological phenomena in photonics and acoustics
The current state of the art of topological phenomena in photonics and acoustics is reviewed and future research directions for valuable applications are discussed.
- Xiujuan Zhang
- , Farzad Zangeneh-Nejad
- & Johan Christensen
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Article |
Imaging tunable quantum Hall broken-symmetry orders in graphene
Three tunable quantum Hall broken-symmetry states in charge-neutral graphene are identified by visualizing their lattice-scale order with scanning tunnelling microscopy and spectroscopy.
- Alexis Coissard
- , David Wander
- & Benjamin Sacépé
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Article |
Subterahertz collective dynamics of polar vortices
A dynamical study shows that vortices of electrical polarization have higher frequencies and smaller size than their magnetic counterparts, properties that are promising for electric-field-driven data processing.
- Qian Li
- , Vladimir A. Stoica
- & Haidan Wen
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Article |
Trapped fractional charges at bulk defects in topological insulators
It is experimentally shown that crystallographic defects may trap fractional charges, as well as topological states, in the bulk of topological crystalline insulators.
- Christopher W. Peterson
- , Tianhe Li
- & Gaurav Bahl
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Article |
Bulk–disclination correspondence in topological crystalline insulators
It is experimentally shown that topological states exist at crystallographic defects in the bulk and that disclination defects trap fractional charges characteristic of topological crystalline insulators.
- Yang Liu
- , Shuwai Leung
- & Jian-Hua Jiang
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Article |
Inverse transition of labyrinthine domain patterns in ferroelectric thin films
The labyrinthine domain patterns formed in ultrathin films of ferroelectric oxides by subcritical quenching undergo an inverse phase transition to the less-symmetric parallel-stripe domain structure upon increasing temperature.
- Y. Nahas
- , S. Prokhorenko
- & L. Bellaiche
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Letter |
Interacting multi-channel topological boundary modes in a quantum Hall valley system
Scanning tunnelling microscopy shows that 1D channels between quantum Hall states with different valley polarization are metallic or insulating depending on constraints imposed on electron–electron interaction by valley flavour.
- Mallika T. Randeria
- , Kartiek Agarwal
- & Ali Yazdani
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Letter |
Transformation between meron and skyrmion topological spin textures in a chiral magnet
A magnetically induced two-dimensional square lattice of merons and antimerons is observed in real space, along with its transformation into a hexagonal lattice of skyrmions at room temperature.
- X. Z. Yu
- , W. Koshibae
- & Y. Tokura
Non-reciprocal topological solitons in active metamaterials