TY - JOUR
T1 - Role of compensating current in the weak Josephson coupling regime
T2 - An extended study on excitonic Josephson junctions
AU - Hsu, Ya Fen
AU - Su, Jung Jung
N1 - Publisher Copyright:
© 2021 American Physical Society.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/2/1
Y1 - 2021/2/1
N2 - Huang's experiment [Phys. Rev. Lett. 109, 156802 (2012)PRLTAO0031-900710.1103/PhysRevLett.109.156802] found, in the quantum Hall bilayer of the Corbino geometry, the interlayer tunneling currents at two edges are coupled to each other and one of two tunneling currents is referred to as the compensating current of the other. The recent theoretical work [Hsu, arXiv:2006.15329] has explained this exotic coupling phenomenon as a result of excitonic Josephson effect induced by interlayer tunneling current. In this paper, we study the same setup - excitonic Josephson junction - but in the weak Josephson coupling regime, which occurs for large junction length. Interestingly, we find the compensating current drives the other edge to undergo a nonequilibrium phase transition from a superfluid to resistive state, which is signaled by an abrupt jump of the critical tunneling current. We also identify the critical exponent and furthermore offer more experimental prediction.
AB - Huang's experiment [Phys. Rev. Lett. 109, 156802 (2012)PRLTAO0031-900710.1103/PhysRevLett.109.156802] found, in the quantum Hall bilayer of the Corbino geometry, the interlayer tunneling currents at two edges are coupled to each other and one of two tunneling currents is referred to as the compensating current of the other. The recent theoretical work [Hsu, arXiv:2006.15329] has explained this exotic coupling phenomenon as a result of excitonic Josephson effect induced by interlayer tunneling current. In this paper, we study the same setup - excitonic Josephson junction - but in the weak Josephson coupling regime, which occurs for large junction length. Interestingly, we find the compensating current drives the other edge to undergo a nonequilibrium phase transition from a superfluid to resistive state, which is signaled by an abrupt jump of the critical tunneling current. We also identify the critical exponent and furthermore offer more experimental prediction.
UR - http://www.scopus.com/inward/record.url?scp=85100674090&partnerID=8YFLogxK
U2 - 10.1103/physrevb.103.064501
DO - 10.1103/physrevb.103.064501
M3 - Article
AN - SCOPUS:85100674090
SN - 2469-9950
VL - 103
SP - 1
EP - 9
JO - Physical Review B
JF - Physical Review B
IS - 6
M1 - 064501
ER -