9 papers
Hinge modes of three-dimensional Euler insulators
Yutaro Tanaka, Shingo Kobayashi
In two-dimensional systems with space-time inversion symmetry, such as , the reality condition on wave functions gives rise to real band topology characterized by the Eule…
Majorana-assisted nonlocal spin correlation in quasi-one-dimensional Kitaev spin liquids
Yuki Yamazaki, Shingo Kobayashi, Akira Furusaki
We propose Majorana-assisted nonlocal spin correlation as a manifestation of Majorana nonlocality in quasi-one-dimensional (1D) Kitaev spin liquids. Focusing on the flux-free secto…
Euler band topology in superfluids and superconductors
Shingo Kobayashi, Manabu Sato, Akira Furusaki
Real band topology often appears in systems with space-time inversion symmetry and is characterized by invariants such as the Euler and second Stiefel-Whitney classes. Here, we exa…
Three-dimensional spinless Euler insulators with rotational symmetry
Manabu Sato, Shingo Kobayashi, Motoaki Hirayama +1
The Euler class is a -valued topological invariant that characterizes a pair of real bands in a two-dimensional Brillouin zone. One of the symmetries that permits its d…
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…
Higher-order topological phases for time-reversal-symmetry breaking superconductivity in UTe
Yuki Yamazaki, Shingo Kobayashi
The recent discovery of heavy-fermion superconductor UTe has broadened the possibility of realizing exotic time-reversal-symmetry-breaking superconductivity. However, a compreh…