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Goryo, Jun

Sigrist, Manfred

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Title Chiral feedback mechanism in p-wave superconductors(NewDevelopments in Strongly Correlated Electron Systems)Author(s)Goryo, Jun; Sigrist, ManfredCitation物性研究 (2001), 76(5): 695-695Issue Date2001-08-20URL http://hdl.handle.net/2433/97038RightType Departmental Bulletin PaperTextversionpublisherKyoto UniversityINew Developments in Strongly Correlated Electron SystemsJQuasiparticle States in Dirty d-Wave SuperconductorsTakahiro Fukui, Ibaraki University, !vlitoA lattice Inodel for disordered d-wave superconductors with spin-rotation andtilne-reversal synunetries is reconsidered. Near the band center, the latticeluodel can be described by several Dirac fenuions. Each Dirac fernlion yieldsa vVess-Zuluino-Witten (vVZW) tenn for an effective action of the Goldstonenlode, which is known to play a crucial role in the critical phenonlena intwo dimensions. The WZW tenns, however, cancel out each other in thefinal action because of the fourfold symmetry of the model., suggesting thequasiparticle states are localized. By explicitly breaking the sylumetry of thelattice nlodel, we discuss the possibility of the WZW tenn.Chiral feedback mechanisnl in p-wave superconductorsJun Goryo (ISSP, University of Tokyo),andManfred Sigrist (YITP, Kyoto University)III a quasi-two-dilnensional p-wave superconductor there find six Cooperpairing states which are degenerate within the weak-coupling approach. Weshow that this degeneracy can be lifted by feedback effect favoring the so-called chiral p-wave state. This effect is based on the anomalous couplingbetween charge and current in a systelll with broken tilue reversal sylurnetryand parity.Reference J. Goryo and Ivl. Sigrist, J. Phys. eM 12 L599 (2000).- 695-

Chiral feedback mechanism in p-wave superconductors(New Developments in Strongly Correlated Electron Systems)

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Chiral feedback mechanism in p-wave superconductors(New Developments in Strongly Correlated Electron Systems)

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