63 citations · 242 across the 12 of their papers we have counts for
9 papers · 1 filter
Josephson diode effect derived from short-range coherent coupling
Sadashige Matsuo, Takaya Imoto, Tomohiro Yokoyama +6
Superconducting devices with broken time-reversal and spatial-inversion symmetries can exhibit novel superconducting phenomena. The observation of superconducting diode effects, wh…
Engineering of anomalous Josephson effect in coherently coupled Josephson junctions
Sadashige Matsuo, Takaya Imoto, Tomohiro Yokoyama +6
A Josephson junction (JJ) is a key device in the development of superconducting circuits, wherein a supercurrent in the JJ is controlled by the phase difference between the two sup…
Functionalized high-speed magnon-polaritons resulting from the magnetic antenna effect
Kenta Kato, Tomohiro Yokoyama, Hajime Ishihara
Magnon-polaritons (MPs) refer to a light--magnon coupled state and can potentially act as information carriers, possibly enabling charge-free computation. However, the light--magno…
Comprehensive Microscopic Theory for Coupling of Longitudinal--Transverse Fields and Individual--Collective Excitations
Tomohiro Yokoyama, Masayuki Iio, Takashi Kinoshita +2
A plasmon is a collective excitation of electrons due to the Coulomb interaction. Both plasmons and single-particle excitations (SPEs) are eigenstates of bulk metallic systems and…
Order, disorder and tunable gaps in the spectrum of Andreev bound states in a multi-terminal superconducting device
Tomohiro Yokoyama, Johannes Reutlinger, Wolfgang Belzig +1
We consider the spectrum of Andreev bound states (ABSs) in an exemplary 4-terminal superconducting structure where 4 chaotic cavities are connected by QPCs to the terminals and to…
Josephson Current through Semiconductor Nanowire with Spin-Orbit Interaction in Magnetic Field
Tomohiro Yokoyama, Mikio Eto, Yuli V. Nazarov
We theoretically study the DC Josephson effect of a semiconductor nanowire (NW) with strong spin-orbit interaction when a magnetic field is applied parallel to the NW. We adopt a m…