10 papers
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…
Robust realization of spin-polarized specular Andreev reflection in VO-based altermagnets
Yutaro Nagae, Andreas P. Schnyder, Satoshi Ikegaya
We theoretically investigate charge transport in a junction between a conventional superconductor and a VO-based altermagnet exhibiting distinctive spin-split quasi-one-dimensi…
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_…
Spin-polarized Specular Andreev Reflections in Altermagnets
Yutaro Nagae, Andreas P. Schnyder, Satoshi Ikegaya
We show theoretically that specular Andreev reflection occurs stably at altermagnet--superconductor interfaces, which is a phenomenon that has previously been predicted only in a l…
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…