174 citations · 990 across the 36 of their papers we have counts for
6 papers · 1 filter
Bogoliubov Fermi surfaces from pairing of emergent fermions on the pyrochlore lattice
Shingo Kobayashi, Ankita Bhattacharya, Carsten Timm +1
We examine the appearance of superconductivity in the strong-coupling limit of the Hubbard model on the pyrochlore lattice. We focus upon the limit of half filling, where the norma…
Quasiparticle on Bogoliubov Fermi Surface and Odd-Frequency Cooper Pair
Dakyeong Kim, Shingo Kobayashi, Yasuhiro Asano
We discuss a close relationship between a quasiparticle on the Bogoliubov Fermi surface and an odd-frequency Cooper pair in a superconductor in which a Cooper pair consisting of tw…
Possible topological phases in quantum anomalous Hall insulator/unconventional superconductor hybrid systems
Ryoi Ohashi, Shingo Kobayashi, Yukio Tanaka
Quantum anomalous Hall insulator (QAH)/-wave superconductor (SC) hybrid systems are known to be an ideal platform for realizing two-dimensional topological superconductors with…
Fragile topological insulators protected by rotation symmetry without spin-orbit coupling
Shingo Kobayashi, Akira Furusaki
We present a series of models of three-dimensional rotation-symmetric fragile topological insulators in class AI (time-reversal symmetric and spin-orbit-free systems), which have g…
Electric Multipoles of Double Majorana Kramers Pairs
Yuki Yamazaki, Shingo Kobayashi, Ai Yamakage
A single Majorana Kramers pair hosts only one component of the magnetic multipole. This can be used to determine the bulk Cooper-pair symmetry through surface-sensitive spectroscop…
Josephson effect of superconductors with electrons
Dakyeong Kim, Shingo Kobayashi, Yasuhiro Asano
The angular momentum of an electron is characterized well by pseudospin with in the presence of strong spin-orbit interactions. We study theoretically the Josephson effect…