TY - JOUR
T1 - Two-channel Kondo physics in a Majorana island coupled to a Josephson junction
AU - Landau, L. A.
AU - Sela, E.
N1 - Publisher Copyright:
© 2017 American Physical Society.
PY - 2017/1/23
Y1 - 2017/1/23
N2 - We study a Majorana island coupled to a bulk superconductor via a Josephson junction and to multiple external normal leads. In the absence of the Josephson coupling, the system displays a topological Kondo state, which had been largely studied recently. However, we find that this state is unstable even to small Josephson coupling, which instead leads at low temperature T to a new fixed point. Most interesting is the case of three external leads, forming a minimal electronic realization of the long sought two-channel Kondo effect. While the T=0 conductance corresponds to simple resonant Andreev reflection, the leading T dependence forms an experimental fingerprint for non-Fermi-liquid properties.
AB - We study a Majorana island coupled to a bulk superconductor via a Josephson junction and to multiple external normal leads. In the absence of the Josephson coupling, the system displays a topological Kondo state, which had been largely studied recently. However, we find that this state is unstable even to small Josephson coupling, which instead leads at low temperature T to a new fixed point. Most interesting is the case of three external leads, forming a minimal electronic realization of the long sought two-channel Kondo effect. While the T=0 conductance corresponds to simple resonant Andreev reflection, the leading T dependence forms an experimental fingerprint for non-Fermi-liquid properties.
UR - http://www.scopus.com/inward/record.url?scp=85010782696&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.95.035135
DO - 10.1103/PhysRevB.95.035135
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AN - SCOPUS:85010782696
SN - 2469-9950
VL - 95
JO - Physical Review B
JF - Physical Review B
IS - 3
M1 - 035135
ER -