4 papers
math.AG2022
On the maximality of genus-3 nonhyperelliptic curves of Ciani type
Ryo Ohashi
In this paper, we study a Ciani curve in positive characteristic . We will show that if is superspecial, then i…
math.AG2022
On the maximality of hyperelliptic Howe curves of genus 3
Ryo Ohashi
In this paper, we study a Howe curve in positive characteristic which is of genus 3 and is hyperelliptic. We will show that if is superspecial, then its standard…
cond-mat.mes-hall2021
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…
cond-mat.supr-con2019
Theory of Tunneling Effect in 1D AIII-class Topological Insulator (Nanowire) Proximity Coupled with a Superconductor
Ryoi Ohashi, Yukio Tanaka, Keiji Yada
We study the tunneling effect in an AIII-class insulator proximity coupled with a spin-singlet -wave superconductor, in which three phases are characterized by the integer topol…