9 citations · 42 across the 7 of their papers we have counts for
7 papers
Discontinuous Transition to Superconducting Phase
Takumi Sato, Shingo Kobayashi, Yasuhiro Asano
We discuss the instability of uniform superconducting states that contain the pairing correlations belonging to the odd-frequency symmetry class. The instability originates from th…
Fulde-Ferrell-Larkin-Ovchinnikov state in a superconducting thin film attached to a ferromagnetic cluster
Shu-Ichiro Suzuki, Takumi Sato, Alexander A. Golubov +1
We study theoretically the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) states appearing locally in a superconducting thin film with a small circular magnetic cluster. The pair potentia…
Spin Susceptibility of a J=3/2 Superconductor
Dakyeong Kim, Takumi Sato, Shingo Kobayashi +1
We discuss the spin susceptibility of superconductors in which a Cooper pair consists of two electrons having the angular momentum J=3/2 due to strong spin-orbit interactions. The…
An odd-frequency Cooper pair around a magnetic impurity
Shu-Ichiro Suzuki, Takumi Sato, Yasuhiro Asano
The Yu-Shiba-Rusinov (YSR) state appears as a bound state of a quasiparticle at a magnetic atom embedded in a superconductor. We discuss why the YSR state has energy below the supe…
Birefringent atomic vapor laser lock in a hollow cathode lamp
Takumi Sato, Yusuke Hayakawa, Naohiro Okamoto +3
We report a robust method of stabilizing a laser to the frequency of an atomic transition using a hollow cathode lamp. In contrast to the standard dichroic atomic vapor laser lock…
Superconductivity in Cu-doped BiSe with potential disorder
Takumi Sato, Yasuhiro Asano
We study the effects of random nonmagnetic impurities on superconducting transition temperature in a Cu-doped BiSe, for which four types of pair potentials have been…
Spectroscopic study of a diffusion-bonded sapphire cell for hot metal vapors
Naota Sekiguchi, Takumi Sato, Kiyoshi Ishikawa +1
Characteristics of a diffusion-bonded sapphire cell for optical experiments with hot metal vapors were investigated. The sapphire cell consisted of sapphire-crystal plates and a bo…