Time-reversal symmetry breaking superconductivity in the coexistence phase with magnetism in Fe-pnictides

Hinojosa, Alberto; Fernandes, Rafael M.; Chubukov, Andrey V.

doi:10.48550/arxiv.1405.7077

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“…[50]. Recently, this mechanism is also studied in a wide context of superconducting systems 91,92 . For example, it has been later proposed in the iron-based superconductors 92 , and its topological electro-magnetic responses have been also studied 91 .…”

Section: Unconventional Triplet Cooper Pairing With Multi-component D...mentioning

confidence: 99%

“…Recently, this mechanism is also studied in a wide context of superconducting systems [91,92]. For example, it has been later proposed in the iron-based superconductors [92] and its topological electro-magnetic responses have been also studied [91]. In fact, the TR symmetry breaking pairing is also a research focus in condensed matter physics, such as in the study of high T c cuprates (e.g.…”

Section: Unconventional Triplet Cooper Pairing With Multi-component D...mentioning

confidence: 99%

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Unconventional symmetries of Fermi liquid and Cooper pairing properties with electric and magnetic dipolar fermions

2014

J. Phys.: Condens. Matter

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The rapid experimental progress of ultra-cold dipolar fermions opens up a whole new opportunity to investigate novel many-body physics of fermions. In this article, we review theoretical studies of the Fermi liquid theory and Cooper pairing instabilities of both electric and magnetic dipolar fermionic systems from the perspective of unconventional symmetries. When the electric dipole moments are aligned by the external electric field, their interactions exhibit the explicit d r 2 −3z 2 anisotropy. The Fermi liquid properties, including the single-particle spectra, thermodynamic susceptibilities, and collective excitations, are all affected by this anisotropy. The electric dipolar interaction provides a mechanism for the unconventional spin triplet Cooper pairing, which is different from the usual spin-fluctuation mechanism in solids and the superfluid 3 He. Furthermore, the competition between pairing instabilities in the singlet and triplet channels gives rise to a novel time-reversal symmetry breaking superfluid state. Unlike electric dipole moments which are induced by electric fields and unquantized, magnetic dipole moments are intrinsic proportional to the hyperfine-spin operators with a Lande factor. Its effects even manifest in unpolarized systems exhibiting an isotropic but spin-orbit coupled nature. The resultant spin-orbit coupled Fermi liquid theory supports a collective sound mode exhibiting a topologically non-trivial spin distribution over the Fermi surface. It also leads to a novel p-wave spin triplet Cooper pairing state whose spin and orbital angular momentum are entangled to the total angular momentum J = 1 dubbed the J-triplet pairing. This J-triplet pairing phase is different from both the spin-orbit coupled 3 He-B phase with J = 0 and the spin-orbit decoupled 3 He-A phase.

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Section: Unconventional Triplet Cooper Pairing With Multi-component D...mentioning

confidence: 99%

Section: Unconventional Triplet Cooper Pairing With Multi-component D...mentioning

confidence: 99%

Unconventional symmetries of Fermi liquid and Cooper pairing properties with electric and magnetic dipolar fermions

2014

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

Time-reversal symmetry breaking superconductivity in the coexistence phase with magnetism in Fe-pnictides

Cited by 1 publication

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Unconventional symmetries of Fermi liquid and Cooper pairing properties with electric and magnetic dipolar fermions

Unconventional symmetries of Fermi liquid and Cooper pairing properties with electric and magnetic dipolar fermions

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