6 papers
Raman response of collective modes in multicomponent superconductors
Yuki Yamazaki, Takahiro Morimoto
We formulate a microscopic theory of the Raman response of superconducting collective modes in multicomponent superconductors. Starting from a general Bogoliubov--de Gennes (BdG) H…
Interaction induced topological magnon in electron-magnon coupled systems
Kosuke Fujiwara, Takahiro Morimoto
We theoretically study the emergence of topological magnons in electron-magnon coupled systems. The magnon dispersion in a ferromagnet usually possesses an effective time reversal…
Microwave Kerr/Faraday Resonance in Two-dimensional Chiral Superconductors
Taiki Matsushita, Jun'ichi Ieda, Yasufumi Araki +3
We investigate the polar Kerr and Faraday effects in two-dimensional multiband chiral superconductors. We show that the clapping modes--the relative phase and amplitude oscillation…
Topological phases of electrons induced by electron-magnon interactions
Kosuke Fujiwara, Takahiro Morimoto
Topological phases of electrons such as topological insulators and quantum Hall states typically require strong spin-orbit coupling or magnetic fields. In this study, we consider a…
Kapitza-Dirac interference of Higgs waves in superconductors
Daemo Kang, Tien-Tien Yeh, Takahiro Morimoto +1
We present a novel framework for controlling Higgs mode and vortex dynamics in superconductors using structured light. We propose a phenomenon analog of the Kapitza-Dirac effect in…
Axion dark matter detection via shift current
Dan Kondo, Takahiro Morimoto, Genta Osaki +1
We propose a novel method to detect axion dark matter based on a topological phenomenon known as the shift current. We make use of the second-order nonlinearity of the shift curren…