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Unusual magnetic order in the pseudogap region of the superconductor HgBa2CuO4+δ

Abstract

The pseudogap region of the phase diagram is an important unsolved puzzle in the field of high-transition-temperature (high-Tc) superconductivity, characterized by anomalous physical properties1,2. There are open questions about the number of distinct phases and the possible presence of a quantum-critical point underneath the superconducting dome3,4,5. The picture has remained unclear because there has not been conclusive evidence for a new type of order. Neutron scattering measurements for YBa2Cu3O6+δ (YBCO) resulted in contradictory claims of no6,7 and weak8,9 magnetic order, and the interpretation of muon spin relaxation measurements on YBCO10,11 and of circularly polarized photoemission experiments on Bi2Sr2CaCu2O8+δ(refs 12, 13) has been controversial. Here we use polarized neutron diffraction to demonstrate for the model superconductor HgBa2CuO4+δ (Hg1201) that the characteristic temperature T* marks the onset of an unusual magnetic order. Together with recent results for YBCO14,15, this observation constitutes a demonstration of the universal existence of such a state. The findings appear to rule out theories that regard T* as a crossover temperature16,17,18 rather than a phase transition temperature19,20,21. Instead, they are consistent with a variant of previously proposed charge-current-loop order19,20 that involves apical oxygen orbitals22, and with the notion that many of the unusual properties arise from the presence of a quantum-critical point3,4,5,19.

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Figure 1: Pseudogap in underdoped Hg1201.
Figure 2: Unusual magnetic order revealed by polarized-neutron diffraction.
Figure 3: Universal pseudogap phase diagram.

References

  1. Timusk, T. & Statt, B. The pseudogap in high-temperature superconductors: an experimental survey. Rep. Prog. Phys. 62, 61–122 (1999)

    ADS  CAS  Article  Google Scholar 

  2. Norman, M. R., Pines, D. & Kallin, C. The pseudogap: friend or foe of high T c? Adv. Phys. 54, 715–733 (2005)

    ADS  CAS  Article  Google Scholar 

  3. Laughlin, R. B. A critique of two metals. Adv. Phys. 47, 943–958 (1998)

    ADS  CAS  Article  Google Scholar 

  4. Sachdev, S. Quantum criticality: competing ground states in low dimensions. Science 288, 475–480 (2000)

    ADS  CAS  Article  Google Scholar 

  5. Tallon, J. L. & Loram, J. W. The doping dependence of T*: what is the real high-T c phase diagram? Physica C 349, 53–68 (2001)

    ADS  CAS  Article  Google Scholar 

  6. Lee, S.-H. et al. Search for orbital moments in underdoped cuprate metals. Phys. Rev. B 60, 10405–10417 (1999)

    ADS  CAS  Article  Google Scholar 

  7. Stock, C. et al. Neutron scattering search for static magnetism in oxygen-ordered YBa2Cu3O6.5 . Phys. Rev. B 66, 024505 (2002)

    ADS  Article  Google Scholar 

  8. Sidis, Y. et al. Antiferromagnetic ordering in superconducting YBa2Cu3O6. 5 . Phys. Rev. Lett. 86, 4100–4103 (2001)

    ADS  CAS  Article  Google Scholar 

  9. Mook, H. A. et al. Polarized neutron measurement of magnetic order in YBa2Cu3O6. 45 . Phys. Rev. B 69, 134509 (2004)

    ADS  Article  Google Scholar 

  10. Sonier, J. E. et al. Anomalous weak magnetism in superconducting YBa2Cu3O6+x . Science 292, 1692–1695 (2001)

    ADS  CAS  Article  Google Scholar 

  11. Sonier, J. E. et al. Correlations between charge ordering and local magnetic fields in overdoped YBa2Cu3O6+x . Phys. Rev. B 66, 134501 (2002)

    ADS  Article  Google Scholar 

  12. Kaminski, A. et al. Spontaneous breaking of time-reversal symmetry in the pseudogap state of a high-T c superconductor. Nature 416, 610–613 (2002)

    ADS  CAS  Article  Google Scholar 

  13. Borisenko, S. V. et al. Circular dichroism in angle-resolved photoemission spectra of under- and overdoped Pb-Bi2212. Phys. Rev. Lett. 92, 207001 (2004)

    ADS  CAS  Article  Google Scholar 

  14. Fauqué, B. et al. Magnetic order in the pseudogap phase of high-T c superconductors. Phys. Rev. Lett. 96, 197001 (2006)

    ADS  Article  Google Scholar 

  15. Mook, H. A. et al. Observation of magnetic order in a YBa2Cu3O6.6 superconductor. Phys. Rev. B 78, 020506 (2008)

    ADS  Article  Google Scholar 

  16. Emery, V. J. & Kivelson, S. A. Importance of phase fluctuations in superconductors with small superfluid density. Nature 374, 434–437 (1995)

    ADS  CAS  Article  Google Scholar 

  17. Lee, P. A. Pseudogaps in underdoped cuprates. Physica C 317, 194–204 (1999)

    ADS  Article  Google Scholar 

  18. Anderson, P. W. et al. The physics behind high-temperature superconducting cuprates: the ‘plain vanilla’ version of RVB. J. Phys. Cond. Mater. 16, R755–R769 (2004)

    CAS  Article  Google Scholar 

  19. Varma, C. M. Non-Fermi-liquid states and pairing instability of a general model of copper oxide metals. Phys. Rev. B 55, 14554–14580 (1997)

    ADS  CAS  Article  Google Scholar 

  20. Varma, C. M. Theory of the pseudogap state of the cuprates. Phys. Rev. B 73, 155113 (2006)

    ADS  Article  Google Scholar 

  21. Chakravarty, S., Laughlin, R. B., Morr, D. K. & Nayak, C. Hidden order in the cuprates. Phys. Rev. B 63, 094503 (2001)

    ADS  Article  Google Scholar 

  22. Weber, C., Läuchli, A., Mila, F. & Giamarchi, T. Orbital currents in extended Hubbard models of high-T c cuprates. Preprint available at 〈http://arxiv.org/abs/0803.3983〉.

  23. Putilin, S. N., Antipov, E. V., Chmaissem, O. & Marezio, M. Superconductivity at 94 K in HgBa2CuO4+δ . Nature 362, 226–228 (1993)

    ADS  CAS  Article  Google Scholar 

  24. Eisaki, H. et al. Effect of chemical inhomogeneity in bismuth-based copper oxide superconductors. Phys. Rev. B 69, 064512 (2004)

    ADS  Article  Google Scholar 

  25. Bobroff, J. et al. 17O NMR evidence for a pseudogap in the monolayer HgBa2CuO4+δ . Phys. Rev. Lett. 78, 3757–3760 (1997)

    ADS  CAS  Article  Google Scholar 

  26. Zhao, X. et al. Crystal growth and characterization of the model high-temperature superconductor HgBa2CuO4+δ . Adv. Mater. 18, 3243–3247 (2006)

    CAS  Article  Google Scholar 

  27. Liang, R., Bonn, D. A. & Hardy, W. N. Evaluation of CuO2 plane hole doping in YBa2Cu3O6+x single crystals. Phys. Rev. B 73, 180505 (2006)

    ADS  Article  Google Scholar 

  28. Yamamoto, A. et al. Thermoelectric power and resistivity of HgBa2CuO4+δ over a wide doping range. Phys. Rev. B 63, 024504 (2001)

    ADS  Article  Google Scholar 

  29. Xia, J. et al. Polar Kerr-effect measurement of the high-temperature YBa2Cu3O6+x superconductor: evidence for broken symmetry near the pseudogap temperature. Phys. Rev. Lett. 100, 127002 (2008)

    ADS  Article  Google Scholar 

  30. Aji, V. & Varma, C. M. Spin order accompanying loop-current order in cuprate superconductors. Phys. Rev. B 75, 224511 (2007)

    ADS  Article  Google Scholar 

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Acknowledgements

We thank H. Alloul and C. Varma for comments. The work at Stanford University was supported by grants from the US Department of Energy and the National Science Foundation.

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Li, Y., Balédent, V., Barišić, N. et al. Unusual magnetic order in the pseudogap region of the superconductor HgBa2CuO4+δ. Nature 455, 372–375 (2008). https://doi.org/10.1038/nature07251

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