Time-reversal symmetry breaking?

Sergey V. Borisenko (), Alexander A. Kordyuk, Andreas Koitzsch, Martin Knupfer, Jörg Fink, Helmuth Berger and Chengtian T. Lin
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Sergey V. Borisenko: Institute for Solid State Research, IFW-Dresden
Alexander A. Kordyuk: Institute for Solid State Research, IFW-Dresden
Andreas Koitzsch: Institute for Solid State Research, IFW-Dresden
Martin Knupfer: Institute for Solid State Research, IFW-Dresden
Jörg Fink: Institute for Solid State Research, IFW-Dresden
Helmuth Berger: Institute of Physics of Complex Matter, EPFL
Chengtian T. Lin: Max-Planck Institute for Solid State Research

Nature, 2004, vol. 431, issue 7004, 1-2

Abstract: Abstract Arising from: Kaminski, A. et al. Nature 416, 610–613 (2002); Kaminaski et al. reply One of the mysteries of modern condensed-matter physics is the nature of the pseudogap state of the superconducting cuprates. Kaminski et al.1 claim to have observed signatures of time-reversal symmetry breaking in the pseudogap regime in underdoped Bi2Sr2CaCu2O8+δ (Bi2212). Here we argue that the observed circular dichroism is due to the 5×1 superstructure replica of the electronic bands and therefore cannot be considered as evidence for spontaneous time-reversal symmetry breaking in cuprates.

Date: 2004
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DOI: 10.1038/nature02931

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