Single-component superconductivity in UTe2 at ambient pressure

Theuss, Florian; Shragai, Avi; Grissonnanche, Gaël; Hayes, Ian M.; Saha, Shanta R.; Eo, Yun Suk; Suarez, Alonso; Shishidou, Tatsuya; Butch, Nicholas P.; Paglione, Johnpierre; Ramshaw, B. J.

doi:10.1038/s41567-024-02493-1

Nat. Phys.

2024

DOI: 10.1038/s41567-024-02493-1

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Single-component superconductivity in UTe2 at ambient pressure

Florian Theuss,

Avi Shragai,

Gaël Grissonnanche

et al.

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2024

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Cited by 10 publications

References 39 publications

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Absence of bulk charge density wave order in the normal state of UTe2

Kengle,

Vonka,

Francoual

et al. 2024

Nat Commun

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A spatially modulated superconducting state, known as pair density wave (PDW), is a tantalizing state of matter with unique properties. Recent scanning tunneling microscopy (STM) studies revealed that spin-triplet superconductor UTe2 hosts an unprecedented spin-triplet, multi-component PDW whose three wavevectors are indistinguishable from a preceding charge-density wave (CDW) order that survives to temperatures well above the superconducting critical temperature, Tc. Whether the PDW is the mother or a subordinate order remains unsettled. Here, based on a systematic search for bulk charge order above Tc using resonant elastic X-ray scattering (REXS), we show that the structure factor of charge order previously identified by STM is absent in the bulk within the sensitivity of REXS. Our results invite two scenarios: either the density-wave orders condense simultaneously at Tc in the bulk, in which case PDW order is likely the mother phase, or the charge modulations are restricted to the surface.

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Absence of bulk charge density wave order in the normal state of UTe2

Kengle,

Vonka,

Francoual

et al. 2024

Nat Commun

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Probing p-wave superconductivity in UTe2 via point-contact junctions

Yoon,

Eo,

Park

et al. 2024

npj Quantum Mater.

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Uranium ditelluride (UTe 2 ) is the strongest contender to date for a p -wave superconductor in bulk form. Here we perform a spectroscopic study of the ambient pressure superconducting phase of UTe 2 , measuring conductance through point-contact junctions formed by metallic contacts on different crystalline facets down to 250 mK and up to 18 T. Fitting a range of qualitatively varying spectra with a Blonder-Tinkham-Klapwijk (BTK) model for p -wave pairing, we can extract gap amplitude and interface barrier strength for each junction. We find good agreement with the data for a dominant p y -wave gap function with amplitude 0.26 ± 0.06 meV. Our work provides spectroscopic evidence for a gap structure consistent with the proposed spin-triplet pairing in the superconducting state of UTe 2 .

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Elastic response reveals the pairing symmetry

Yang

2024

Nat. Phys.

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Single-component superconductivity in UTe2 at ambient pressure

Cited by 10 publications

References 39 publications

Absence of bulk charge density wave order in the normal state of UTe2

Absence of bulk charge density wave order in the normal state of UTe2

Probing p-wave superconductivity in UTe2 via point-contact junctions

Elastic response reveals the pairing symmetry

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