TY - JOUR
T1 - Spontaneous currents in a superconductor with s+is symmetry
AU - Maiti, Saurabh
AU - Sigrist, Manfred
AU - Chubukov, Andrey
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/4/13
Y1 - 2015/4/13
N2 - We analyze the s+is state that is proposed as a candidate superconducting state for strongly hole-doped Ba1-xKxFe2As2. Such a state breaks time-reversal symmetry (TRS) but does not break any other discrete symmetry. We address the issue as to whether TRS breaking alone can generate spontaneous currents near impurity sites, which could be detected in, e.g., muon spin relaxation experiments. We argue that there are no spontaneous currents if only TRS is broken. However, supercurrents do emerge if the system is put under external strain and C4 lattice rotation symmetry is externally broken.
AB - We analyze the s+is state that is proposed as a candidate superconducting state for strongly hole-doped Ba1-xKxFe2As2. Such a state breaks time-reversal symmetry (TRS) but does not break any other discrete symmetry. We address the issue as to whether TRS breaking alone can generate spontaneous currents near impurity sites, which could be detected in, e.g., muon spin relaxation experiments. We argue that there are no spontaneous currents if only TRS is broken. However, supercurrents do emerge if the system is put under external strain and C4 lattice rotation symmetry is externally broken.
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U2 - 10.1103/PhysRevB.91.161102
DO - 10.1103/PhysRevB.91.161102
M3 - Article
AN - SCOPUS:84929191907
SN - 1098-0121
VL - 91
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 16
M1 - 161102
ER -