Time-reversal symmetry breaking?: Superconductors

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...

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Published in:Nature (London) 2004-09, Vol.431 (7004), p.1-2
Main Authors: Borisenko, Sergey V., Kordyuk, Alexander A., Koitzsch, Andreas, Knupfer, Martin, Fink, Jörg, Berger, Helmuth, Lin, Chengtian T.
Format: Article
Language:English
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Humanities and Social Sciences
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Science
Science (multidisciplinary)
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Summary: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 Bi 2 Sr 2 CaCu 2 O 8+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.
ISSN:0028-0836
1476-4687
DOI:10.1038/nature02931