Detecting Dichroism in Angle Resolved Photoemission

Abstract

Recently, the time-reversal violation predicted for the pseudogap phase of the cuprates, which was observed by dichroism experiments using Angle-Resolved Photoemission has also been observed by polarized neutron diffraction. Earlier derivation of dichroism in angle resolved photoemission due to time-reversal violation relied on existence of mirror planes in the crystal. Here the theory of the effect is generalized to the case that mirror plane symmetry is weakly violated due to perturbing potentials such as a superstructure.

Addenda to Simon and Varma, Phys. Rev. Lett. vol. 89, 247003-1 (2002) and A. Kaminski, et al., Nature, vol. 416, 610 (2002)

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• Topological Transition in the Fermi Surface of Cuprate Superconductors in the Pseudogap Regime
• Screening of point charge impurities in highly anisotropic metals: application to ${\mu }^{+}$ spin relaxation in underdoped cuprates
• Surface and bulk electronic structure of unconventional superconductor Sr_2RuO_4: unusual splitting of the beta-band
• A different NMR view of cuprate superconductors