Bose glass and Fermi glass.

Autor: Takahashi K; Department of Applied Physics, Hokkaido University, Sapporo, 060-8628, Japan. korere@gmail.com.; Center of Education and Research for Topological Science and Technology, Hokkaido University, Sapporo, 060-8628, Japan. korere@gmail.com.; Nomura Research Institute, Ltd., Tokyo, 100-0004, Japan. korere@gmail.com., Nakatsugawa K; Center of Education and Research for Topological Science and Technology, Hokkaido University, Sapporo, 060-8628, Japan.; Research Center for Materials Nanoarchitectonics, National Institute for Material Science, Tsukuba, 305-0044, Japan., Sakoda M; Department of Applied Physics, Hokkaido University, Sapporo, 060-8628, Japan.; Center of Education and Research for Topological Science and Technology, Hokkaido University, Sapporo, 060-8628, Japan., Nanao Y; School of Physics and Astronomy, University of St Andrews, Fife, KY16 9SS, Scotland., Nobukane H; Center of Education and Research for Topological Science and Technology, Hokkaido University, Sapporo, 060-8628, Japan.; Department of Physics, Hokkaido University, Sapporo, 060-0810, Japan., Obuse H; Department of Applied Physics, Hokkaido University, Sapporo, 060-8628, Japan.; Center of Education and Research for Topological Science and Technology, Hokkaido University, Sapporo, 060-8628, Japan., Tanda S; Department of Applied Physics, Hokkaido University, Sapporo, 060-8628, Japan.; Center of Education and Research for Topological Science and Technology, Hokkaido University, Sapporo, 060-8628, Japan.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 Aug 01; Vol. 13 (1), pp. 12434. Date of Electronic Publication: 2023 Aug 01.
DOI: 10.1038/s41598-023-39285-1
Abstrakt: It is known that two-dimensional superconducting materials undergo a quantum phase transition from a localized state to superconductivity. When the disordered samples are cooled, bosons (Cooper pairs) are generated from Fermi glass and reach superconductivity through Bose glass. However, there has been no universal expression representing the transition from Fermi glass to Bose glass. Here, we discovered an experimental renormalization group flow from Fermi glass to Bose glass in terms of simple [Formula: see text]-function analysis. To discuss the universality of this flow, we analyzed manifestly different systems, namely a Nd-based two-dimensional layered perovskite and an ultrathin Pb film. We find that all our experimental data for Fermi glass fall beautifully into the conventional self-consistent [Formula: see text]-function. Surprisingly, however, flows perpendicular to the conventional [Formula: see text]-function are observed in the weakly localized regime of both systems, where localization becomes even weaker. Consequently, we propose a universal transition from Bose glass to Fermi glass with the new two-dimensional critical sheet resistance close to [Formula: see text].
(© 2023. The Author(s).)
Databáze: MEDLINE
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