5 papers · 1 filter
Collective quantum phases in frustrated arrays of Josephson junctions
M. V. Fistul, O. Neyenhuys, B. Pernack +3
We study collective quantum phases and quantum phase transitions occurring in frustrated sawtooth arrays of small quantum Josephson junctions. Frustration is introduced through the…
Theory of potential impurity scattering in pressurized superconducting LaNiO
Steffen Bötzel, Frank Lechermann, Takasada Shibauchi +1
Recently discovered high-T superconductivity in pressurized bilayer nickelate LaNiO (La-327) is believed to be driven by the non-phononic repulsive interaction. Dep…
Electronic instability, layer selectivity and Fermi arcs in LaNiO
Frank Lechermann, Steffen Bötzel, Ilya M. Eremin
Using advanced dynamical mean-field theory on a realistic level we study the normal-state correlated electronic structure of the high-pressure superconductor LaNiO and…
Quantum dynamics of frustrated Josephson junction arrays embedded in a transmission line: an effective XX spin chain with long-range interaction
Benedikt J. P. Pernack, Mikhail V. Fistul, Ilya M. Eremin
We study theoretically a variety of collective quantum phases occurring in frustrated saw-tooth chains of Josephson junctions embedded in a dissipationless transmission line. The b…
Theory of magnetic excitations in multilayer nickelate superconductor LaNiO
Steffen Bötzel, Frank Lechermann, Jannik Gondolf +1
Motivated by the recent reports of high- superconductivity in LaNiO under pressure, we analyzed theoretically the magnetic excitations in the normal and the superc…