Quantum critical dynamics of a Josephson junction at the topological transition

Vladislav D. Kurilovich, Chaitanya Murthy, Pavel D. Kurilovich, Bernard van Heck, Leonid I. Glazman, Chetan Nayak

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

We find the admittance of a Josephson junction at or near a topological transition. The dependence of the admittance on frequency and temperature at the critical point is universal and determined by the symmetries of the system. Despite the absence of a spectral gap at the transition, the dissipative response may remain weak at low energies: . This behavior is strikingly different from the electromagnetic response of a normal metal. Away from the critical point, the scaling functions for the dependence of the admittance on frequency and temperature are controlled by at most two parameters.

Original languageEnglish
Article number014509
Number of pages22
JournalPhysical Review B
Volume104
Issue number1
DOIs
Publication statusPublished - 2021

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