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Crystal structure of the unconventional spin-triplet superconductor UTe2 at low temperature by single crystal neutron diffraction

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arxiv 1905.04377 v1 pith:DQIQQ5CH submitted 2019-05-10 cond-mat.supr-con cond-mat.mtrl-sci

V. Hutanu , H. Deng , S. Ran , W. T. Fuhrman , H. Thoma , N. P. Butch This is my paper · ORCID
classification cond-mat.supr-concond-mat.mtrl-sci
keywords crystaldiffractionstructuretemperatureneutronreportedsingleute2
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The crystal structure of the new superconductor UTe2 has been investigated for the first time at low temperature (LT) of 2.7 K, just closely above the superconducting transition temperature of about 1.7 K by single crystal neutron diffraction, in order to prove, whether the orthorhombic structure of type Immm (Nr. 71 Int. Tabl.) reported for room temperature (RT) persists down to the superconducting phase and can be considered as a parent symmetry for the development of spin triplet superconductivity. Our results show that the RT structure reported previously obtained by single crystal X-Ray diffraction indeed describes also the LT neutron diffraction data with high precision. No structural change from RT down to 2.7 K is observed. Detailed structural parameters for UTe2 at LT are reported.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Microscopic evidence for a chiral superconducting order parameter in the heavy fermion superconductor UTe2

    cond-mat.mtrl-sci 2019-08 conditional novelty 7.0 of 10

    STM shows orientation-dependent in-gap edge states in UTe2, interpreted as signatures of chiral spin-triplet superconductivity.

  2. Novel universality class for the ferromagnetic transition in the low carrier concentration systems UTeS and USeS exhibiting large negative magnetoresistance

    cond-mat.str-el 2019-08 conditional novelty 6.0 of 10

    The ferromagnetic transitions in UTeS and USeS show critical exponents (beta around 0.30, gamma near 1.00, delta about 4.2 to 4.3) that differ from the 3D Ising model and resemble a common uranium-compound universality class.

  3. Point Node Gap Structure of Spin-Triplet Superconductor UTe2

    cond-mat.supr-con 2019-08 conditional novelty 6.0 of 10

    Heat flow, magnetic penetration, and specific heat data on UTe2 are best explained by a spin-triplet superconducting gap with point nodes, once a fitted divergent specific heat term is removed.

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