Berlin 2024 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 76: Superconductivity: Tunnelling and Josephson Junctions II
TT 76.6: Vortrag
Donnerstag, 21. März 2024, 16:30–16:45, H 3010
Resistivity tensor of vortex-lattice states in Josephson junction arrays — •Alexander Penner1, Karsten Flensberg2, Leonid Glazman3, and Felix von Oppen1 — 1Freie Universität Berlin — 2University of Copenhagen — 3Yale University
Two-dimensional Josephson junction arrays frustrated by a perpendicular magnetic field are predicted to form a cascade of distinct vortex lattice states. Here, we show that the resistivity tensor provides both structural and dynamical information on the vortex-lattice states and intervening phase transitions, which allows for experimental identification of these symmetry-breaking ground states. We illustrate our general approach by a microscopic theory of the resistivity tensor for a range of magnetic fields exhibiting a rich set of vortex lattices as well as transitions to liquid-crystalline vortex states.
Keywords: Josephson junction array; Vortex lattice; Symmetry breaking; Resistivity tensor; frustrated xy model