Higgs modes in d-wave and multi-band superconductors
Jun 29, 2018
11:00 - 12:00
University of Tokyo, & AIST, Tsukuba, Japan
CFEL (Bldg. 99)
Seminar Room I-II, EG.076-078
Higgs mode (collective amplitude mode) in superconductors, recently detected and analysed in a conventional, s-wave superconductor, opens a novel avenue for probing the U(1) symmetry broken state. Now we have extended the notion to an unconventional, d-wave high-Tc cuprate, where a characteristic third-harmonic generation hallmarks the d-wave superconductor in a space-group resolved manner. We can also predict unique features in Higgs and Leggett (phase) modes if we turn to multiband superconductors. K. Katsumi et al, PRL 120, 117001 (2018). Y. Murotani et al, PRB 95, 104503 (2017).