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Phys Rev Lett. 2002 Dec 9;89(24):247003. Epub 2002 Nov 21.

Detection and implications of a time-reversal breaking state in underdoped cuprates.

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1
Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974, USA.

Abstract

We present general symmetry considerations on how a time-reversal breaking state may be detected by angle-resolved photoemission using circularly polarized photons as has been proposed earlier. Results of recent experiments utilizing the proposal in underdoped cuprates are analyzed and found to be consistent in their symmetry and magnitude with a theory of the copper oxides. These experiments if correct, together with evidence of a quantum critical point and marginal Fermi-liquid properties near optimum doping, suggest that the essentials of a valid microscopic theory of the phenomena in the cuprates may have been found.

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