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16 papers · 2 filters
Superconducting Transport in single and parallel double InAs Quantum Dot Josephson Junctions with Nb-based Superconducting Electrodes
Shoji Baba, Juergen Sailer, Russell S. Deacon +4
We report conductance and supercurrent measurements for InAs single and parallel double quantum dot Josephson junctions contacted with Nb or NbTiN superconducting electrodes. Large…
Possible "Magnéli" phases and self-alloying in the superconducting sulfur hydride
Ryosuke Akashi, Wataru Sano, Ryotaro Arita +1
We theoretically give an infinite number of metastable crystal structures for the superconducting sulfur hydride HS under pressure. It has been thought that theoretically pre…
Exotic s-wave superconductivity in alkali-doped fullerides
Yusuke Nomura, Shiro Sakai, Massimo Capone +1
Alkali-doped fullerides (A3C60 with A=K, Rb, Cs) show a surprising phase diagram, in which a high transition-temperature (Tc) s-wave superconducting state emerges next to a Mott in…
Metallic ground state in an ion-gated two-dimensional superconductor
Yu Saito, Yuichi Kasahara, Jianting Ye +2
Recently emerging two-dimensional (2D) superconductors in atomically thin layers and at heterogeneous interfaces are attracting growing interest in condensed matter physics. Here,…
Multiple amplitude modes in strongly-coupled phonon-mediated superconductors
Yuta Murakami, Philipp Werner, Naoto Tsuji +1
We study collective amplitude modes of the superconducting order parameter in strongly-coupled electron-phonon systems described by the Holstein model using the nonequilibrium dyna…
Theory of light-induced resonances with collective Higgs and Leggett modes in multiband superconductors
Yuta Murotani, Naoto Tsuji, Hideo Aoki
We theoretically investigate coherent optical excitations of collective modes in two-band BCS superconductors, which accommodate two Higgs modes and one Leggett mode corresponding,…