5 papers
Hierarchical structure of primary and hybridization-induced superconducting correlations in bilayer nickelates
Hiroshi Watanabe, Hirofumi Sakakibara, Kazuhiko Kuroki
High-pressure superconductivity in the bilayer nickelate LaNiO, with a transition temperature approaching 80 K, has stimulated intense debate regarding its microscopic…
Possibility of BCS-BEC crossover in -type organic superconductors
Hiroshi Watanabe, Hiroaki Ikeda
The realization of BCS-BEC crossover in superconductors, which smoothly connects Bardeen-Cooper-Schrieffer (BCS) theory with Bose-Einstein Condensation (BEC) in fermion systems, is…
Evolution and Instability of Bogoliubov Fermi Surfaces under Zeeman Field
Tatsuaki Mori, Hiroshi Watanabe, Hiroaki Ikeda
We theoretically investigate the evolution and instability of the Bogoliubov Fermi surface (BFS) in the spherical model under a Zeeman field. The applied field induces a pr…
Problem of nonlinear conductivity within relaxation time approximation in noncentrosymmetric insulators
Ibuki Terada, Sota Kitamura, Hiroshi Watanabe +1
With the recent advancements in laser technology, there has been increasing interest in nonlinear and nonperturbative phenomena such as nonreciprocal transport, the nonlinear Hall…
Multi-tunneling effect of nonreciprocal Landau-Zener tunneling: Insights from DC field responses
Ibuki Terada, Sota Kitamura, Hiroshi Watanabe +1
Recent advancements in laser technology have spurred growing interest in nonlinear and nonequilibrium phenomena. Here, we investigate the geometric aspects of quantum tunneling and…