Time-reversal symmetry-breaking superconductivity in heavy-fermion PrOs4Sb12 detected by muon-spin relaxation.
We report on muon-spin relaxation measurements of the 4f(2)-based heavy-fermion superconductor filled-skutterudite Pr(Os4Sb12. The results reveal the spontaneous appearance of static internal magnetic fields below the superconducting transition temperature, providing unambiguous evidence for the breaking of time-reversal symmetry in the superconducting state. A discussion is made on which of the spin or orbital component of Cooper pairs carries a nonzero momentum.
Aoki
Y
Y
Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan.
Tsuchiya
A
A
Kanayama
T
T
Saha
S R
SR
Sugawara
H
H
Sato
H
H
Higemoto
W
W
Koda
A
A
Ohishi
K
K
Nishiyama
K
K
Kadono
R
R