Spin-Triplet Superconductivity in UTe2 and Ferromagnetic Superconductors
Year: 2020
Type: conference-paper
Abstract: The spin-triplet state is most likely realized in uranium ferromagnetic superconductors, UGe2, URhGe, UCoGe. The microscopic coexistence of ferromagnetism and superconductivity means that the Cooper pair should be realized under the strong internal field due the ferromagnetism, leading to the spin-triplet state with equal spin pairing. The field-reinforced superconductivity, which is observed in all three materials when the ferromagnetic fluctuations are enhanced, is one of the strong evidences for the spin-triplet superconductivity. We present here the results of a newly discovered spin-triplet superconductor, UTe2, and compare those with the results of ferromagnetic superconductors. Although no magnetic order is found in UTe2, there are similarities between UTe2 and ferromagnetic superconductors. For example, the huge upper critical field exceeding the Pauli limit and the field-reentrant superconductivity for H || b-axis are observed in UTe2, URhGe and UCoGe. We also show the specific heat results on UTe2 in different quality samples, focusing on the residual density of states in the superconducting phase.
Authors: Dai Aoki, Ai Nakamura, Fuminori Honda, DeXin Li, Yoshiya Homma, Yusei Shimizu, Yoshiki J. Sato, Georg Knebel, Jean-Pascal Brison, Alexandre Pourret, Daniel Braithwaite, Gerard Lapertot, Qun Niu, Michal Vališka, Hisatomo Harima, Jacques Flouquet
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Awards: Material development and physical property study of new locally non-centrosymmetric uranium compounds, G2369834278, Study of Unconventional Multiple-Superconductivity and Non-Fermi-Liquid State in Uranium Compounds, Metamagnetism and superconducting transition in uranium-based novel heavy fermion superconductors, G3928749867, スピン三重項状態を持つ強磁性超伝導体のトポロジカル物性とフェルミ面, Study of superconducting symmetry and magnetic response in the uranium exotic superconductors using high-quality single crystals, G6770061744, G7137355662, Novel fermiology by current-induced phenomena, Investigation of exotic quantum phenomena on strongly correlated electron materials without inversion symmetry in their crystal structures under ultra high pressure(Fostering Joint International Research)
OpenAlex ID: W3010014036