| Mixed triplet and singlet pairing in multicomponent fermion systems with dipolar interactions (2009) | |||||||||
Abstract | |||||||||
| The symmetry properties of the Cooper pairing problem for multi-component ultra-cold dipolar molecular systems are investigated. The dipolar anisotropy provides a natural and robust mechanism for both triplet and singlet Cooper pairing to first order in the interaction strength. With a purely dipolar interaction, the $p_z$-like polar pairing is the most dominant. The triplet pairing channel can mix with the singlet pairing channel by developing a relative phase of $\frac{\pi}{2}$, and thus spontaneously breaking time-reversal symmetry. We also suggest the possibility of such mixing of triplet and singlet pairing in other systems. | |||||||||
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