9 papers
Low-temperature anomaly and anisotropy of critical magnetic fields in transition-metal dichalcogenide superconductors
Tomoya Sano, Kota Tabata, Akihiro Sasaki +1
We clarify why spin-singlet superconductivity persists in monolayer transition-metal dichalcogenides even in high magnetic fields beyond the Pauli limit. The phenomenon called Isin…
Finite-momentum superconducting states due to odd-frequency Cooper pairing correlations
Takumi Sato, Satoru Hayami, Shingo Kobayashi +1
This paper discusses the origin of a nonuniform superconducting state in which Cooper pairs have a small but finite center-of-mass momentum. We analyze the instability of the norma…
Nonlocal Cooper pairs in finite topological superconductors and their relation to Majorana nonlocality
Hiroto Mizoguchi, Yutaro Nagae, Yasuhiro Asano +1
We identify two fundamental properties of the Gor'kov Green's function of finite one-dimensional topological superconductors. In the low-frequency (low-energy) regime, the normal a…
Reentrant Superconductivity in Zeeman Fields
Tomoya Sano, Kota Tabata, Satoshi Ikegaya +1
We propose a theoretical model for a superconductor that exhibits the reentrant superconductivity in Zeeman fields. The Bogoliubov-de Gennes Hamiltonian includes three vectors in s…
Exceptionally large winding number of a finite-size topological superconductor
Satoshi Ikegaya, Shingo Kobayashi, Yasuhiro Asano
We study finite-size-induced topological phenomena in unconventional superconductors. Specifically, we focus on a thin film with a persistent spin texture, fabricated on a high-$T_…
Oscillating-charged Andreev Bound States and Their Appearance in UTe
Satoshi Ando, Shingo Kobayashi, Andreas P. Schnyder +2
Surface Andreev bound states, including Majorana bound states in topological superconductors, are typically charge neutral. In this work, we demonstrate the emergence of unconventi…