Time-Reversal Symmetry Breaking inHeavy-Fermion Superconductor UPt3

• Main Authors: Yang, Po-Ho, 楊博賀
• Other Authors: Wu, Wen-Chin
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/63062429442086579256

碩士 === 國立臺灣師範大學 === 物理學系 === 105 === Recent Kerr rotation angle experiments have revealed that time-reversal symmetry (TRS) is broken in B-phase of the unconventional heavy-fermion superconductor UPt3. Based on the widely used E1g and E2u pairing models, we perform a one-band calculation on the optical conductivity and compare the results with the experiments. It is shown that with one band, both E1g and E2u models fail to explain the data because at 1550 nm wavelength of the light used experimentally, the predicted effects are at least two orders of magnitude smaller than the observed ones. We argue that the observed Kerr rotation angle effect on superconducting UPt3 might be due to more than one band.