8π-periodic dissipationless ac Josephson effect on a quantum spin Hall edge via a quantum magnetic impurity
Hoi-Yin Hui, Jay D. Sau
DOI 10.1103/PhysRevB.95.014505 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Time-reversal invariance places strong constraints on the properties of the quantum spin Hall edge. One such restriction is the inevitability of dissipation in a Josephson junction between two superconductors formed on such an edge without the presence of interaction. Interactions and spin-conservation breaking are key ingredients for the realization of the dissipationless ac Josephson effect on such quantum spin Hall edges. We present a simple quantum impurity model that allows us to create a dissipationless fractional Josephson effect on a quantum spin Hall edge. We then use this model to substantiate a general argument that shows that any such nondissipative Josephson effect must necessarily be 8π periodic.
Similar papers
Parity Anomaly and Spin Transmutation in Quantum Spin Hall Josephson Junctions
similarity 0.92Yang Peng et al.
Source status unknown — claims are unverified
Absence of fractional ac Josephson effect in superconducting junctions
similarity 0.91Mikhail S. Kalenkov & Andrei D. Zaikin
Source status unknown — claims are unverified
Fractional Josephson effect in nonuniformly strained graphene
similarity 0.88Shu-Ping Lee et al.
Source status unknown — claims are unverified
Exploring the conventional and anomalous Josephson effects at arbitrary disorder strength in systems with spin-dependent fields
similarity 0.88Maryam Darvishi et al. · 2026 · arXiv:2604.08231
Source status unknown — claims are unverified
Anomalous Josephson Effect between Even- and Odd-Frequency Superconductors
similarity 0.88Yukio Tanaka et al.
Source status unknown — claims are unverified
Robustness of Majorana fermion induced fractional Josephson effect in multichannel superconducting wires
similarity 0.88K. T. Law & Patrick A. Lee
Source status unknown — claims are unverified