Chiral Optical Absorption by a Vortex in px.+-.ipy-Wave Superconductor.

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  • Matsumoto Masashige
    Department of Physics, Faculty of Science, Shizuoka University, 836 Oya, Shizuoka 422–8529
  • Sigrist Manfred
    Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606–8502

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  • Chiral optical Absorption by a Vortex in Px±iPy-Wave Superconductor
  • Chiral Optical Absorption by a Vortex in<i><i>p</i></i><sub><i><i>x</i></i></sub>±<b><i>i</i></b><i><i>p</i></i><sub><i><i>y</i></i></sub>-Wave Superconductor

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Abstract

The chiral optical absorption by a single vortex in apx ± ipy-wave superconductor is studied theoretically.The px±ipy-wave state was recently suggested as the symmetryof the order parameter of Sr2RuO4 superconductor.Due to the violation of time reversal symmetry, there are two types of vortices whose winding orientation is the sameor opposite to the angular momentum of the Cooper pair. In a real material domains with px±ipy-wave states are expected.However, optical absorption of circular polarized lightdepends only on the winding of the vortexand has a low energy absorption peak which results in dichroism.Dichroism occurs if superconductivity is realized on a single Fermisurface sheet. However, in the case of several Fermi surface sheets dichroism may disappear, if the both types of carriers are present, electron-like and hole-like. Therefore chiral optical absorption is a possible experimentto detect the orbital dependent superconductivitywhich was suggested as the superconducting state of Sr2RuO4.

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