8 papers
Superconducting Berry Curvature Dipole
Oles Matsyshyn, Giovanni Vignale, Justin C. W. Song
Superconductivity and Bloch band Berry curvature responses represent two distinct paradigms of quantum coherent phenomena. The former relies on the collective motion of Cooper pair…
Kramers Dichroism in PT Symmetric Magnets
Oles Matsyshyn, Ying Xiong, Justin C. W. Song
Superpositions between states in doubly degenerate Kramers pairs can act as an internal degree of freedom. Here we uncover a Kramers dichroism in PT symmetric magnets: interband tr…
Nonequilibrium Exchange Nonlinear Hall Effect
John Tan, Oles Matsyshyn, Giovanni Vignale +1
Quantum geometric electronic responses are often viewed through a non-interacting lens: independent quasiparticles accumulate Berry phases as they move through a static crystal and…
Correlated quantum shift vector of particle-hole excitations
Xu Yang, Ajit Srivastava, Justin C. W. Song
Excitons are a prime example of how electron interactions affect optical response and excitation. We demonstrate that, beyond its spectra, the bound nature of an exciton's electron…
Superconducting Photocurrent and Light Enriched Supercurrent Phase Relation
Oles Matsyshyn, Justin C. W. Song
Noncentrosymmetric superconductors are expected to exhibit DC photocurrents even for irradiation frequencies below the superconducting gap. Such superconducting photocurrent are no…
Ultra-critical Floquet Non-Fermi Liquid
Li-kun Shi, Oles Matsyshyn, Justin C. W. Song +1
We demonstrate that periodically driven Fermions coupled to simple bosonic baths have steady state occupations of Floquet Bloch bands that generically display non-analyticties at c…