Coherence Effects of Caroli_de Gennes_Matricon Modes in a Nodal Topological Superconductor UPt3

International Conference on Strongly Correlated Electron Systems 2016

Tsutsumi, Yasumasa^1 ; Kato, Yusuke^1

Department of Basic Science, University of Tokyo, Meguro, Tokyo

153-8902, Japan^1

关键词: Coherence effects;    Coherence factors;    Eigenvalue and eigenfunctions;    Gap functions;    Impurity effect;    Impurity scattering;    Self energy;    Superconducting state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/807/5/052005/pdf
DOI  :  10.1088/1742-6596/807/5/052005

来源: IOP

【 摘 要 】

Coherence effects by the impurity scattering of Caroli-de Gennes-Matricon (CdGM) modes in a vortex for the E1uplanar state and the E1uchiral state which are possible superconducting states in UPt3have been studied. First, we analytically derived the eigenvalue and eigenfunction of the CdGM modes under magnetic fields producing a vortex without impurities. Then, we studied impurity effects on the CdGM modes by introducing the impurity self-energy, which are dominated by the coherence factor depending on the eigenfunction of the CdGM modes. The difference of the impurity effects for the E1uplanar and E1uchiral states owing to the magnetic field is possibly utilized to identify the gap function in UPt3.