65 citations · 258 across the 21 of their papers we have counts for
21 papers
Quantized Hall conductance in graphene by nonperturbative magnetic-field-containing relativistic tight-binding approximation method
Md. Abdur Rashid, Masahiko Higuchi, Katsuhiko Higuch
In this study, we conducted a numerical investigation on the Hall conductance () of graphene based on the magnetic energy band structure calculated using a nonperturbativ…
Theoretical description of the first-order phase transition of aluminum from a superconducting to normal state by the current-density functional theory for superconductors
Katsuhiko Higuchi, Masahiko Higuchi
We show that the current-density functional theory for superconductors (sc-CDFT) can describe the magnetic-field-induced first-order phase transition of aluminum from a superconduc…
Second-order phase transition of silicon from a band insulator to metal induced by strong magnetic fields
Katsuhiko Higuchi, Dipendra Bahadur Hamal, Masahiko Higuchi
We present the second-order phase transition from a band insulator to metal that is induced by a strong magnetic field. The magnetic-field dependences of the magnetization and ener…
Relativistic Tight-Binding Model for Hexagonal Lattice: Application to Graphene
Rohin Sharma, Amit Shrestha, Masahiko Higuchi +2
A non-perturbative relativistic tight-binding (TB) approximation method applicable to crystalline material immersed in a magnetic field was developed in 2015. To apply this method…
Conventional and unconventional anomalous velocities in multiband systems
Katsuhiko Higuchi, Wakano Sakamoto, Masahiko Higuchi
The anomalous velocity has been derived so far based on the single-band approximation. In this paper, the anomalous velocity is derived accounting for multiple energy bands. It is…
Cluster Decomposition Principle and Two-Electron Wave Function of the Cooper Pair in the BCS Superconducting State
Katsuhiko Higuchi, Masahiko Higuchi
We present the explicit forms of the maximum eigenvalue and the corresponding eigenfunction for the second-order reduced density matrix (RDM2) of the BCS superconducting state (SS)…