Large Reduction in the a-axis Knight Shift on UTe2 with Tc = 2.1 K

Matsumura, Hiroki; Fujibayashi, Hiroki; Kinjo, Katsuki; Kitagawa, Shunsaku; Ishida, K.; Tokunaga, Y.; Sakai, Hironori; Kambe, S.; Nakamura, Ai; Shimizu, Yusei; Homma, Yoshiya; Li, D.X.; Honda, Fuminori; Aoki, Dai

doi:10.7566/jpsj.92.063701

Cited by 30 publications

(3 citation statements)

References 23 publications

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“…Measurements on a MSF-grown crystal showed a significant change in Knight shift when going through T c of the SC1 phase for fields along all three crystalline axes [115]. In contrast, previously reported NMR measurements of the SC1 state showed no change in Knight shift at T c for fields along the a axis [7].…”

Section: Recent Developmentscontrasting

confidence: 62%

A review of UTe₂at high magnetic fields

Lewin,

Frank,

Ran

et al. 2023

Rep. Prog. Phys.

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Uranium ditelluride (UTe2) is recognized as a host material to unconventional spin-triplet superconductivity, but it also exhibits a wealth of additional unusual behavior at high magnetic fields. One of the most prominent signatures of the unconventional superconductivity is a large and anisotropic upper critical field that exceeds the paramagnetic limit. This superconductivity survives to 35 T and is bounded by a discontinuous magnetic transition, which itself is also fielddirection-dependent. A different, reentrant superconducting phase emerges only on the high-field side of the magnetic transition, in a range of angles between the crystallographic b and c axes. This review discusses the current state of knowledge of these high-field phases, the high-field behavior of the heavy fermion normal state, and other phases that are stabilized by applied pressure.

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Section: Recent Developmentscontrasting

confidence: 62%

A review of UTe₂at high magnetic fields

Lewin,

Frank,

Ran

et al. 2023

Rep. Prog. Phys.

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show abstract

“…Similarly, muon spin relaxation (μSR) measurements of the molten salt flux-grown samples found no evidence of TRSB [22]. Finally, sound velocity changes across T c [23] and recent NMR Knight shift measurements on similar samples [5] both point to a single-component, odd parityorder parameter, i.e., inconsistent with the previous hypothesis of nonunitary pairing.…”

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confidence: 95%

Thermal conductivity of nonunitary triplet superconductors: application to UTe2

Mishra,

Wang,

Hirschfeld

2024

Front. Phys.

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Considerable evidence shows that the heavy fermion material UTe2 is a spin-triplet superconductor, possibly manifesting time-reversal symmetry breaking, as measured by Kerr effect below the critical temperature, in some samples. Such signals can arise due to a chiral orbital state or possible nonunitary pairing. Although experiments at low temperatures appear to be consistent with point nodes in the spectral gap, the detailed form of the order parameter and even the nodal positions are not yet determined. Thermal conductivity measurements can extend to quite low temperatures, and varying the heat current direction should be able to provide information on the order parameter structure. Here, we derive a general expression for the thermal conductivity of a spin-triplet superconductor and use it to compare the low-temperature behavior of various states proposed for UTe2.

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confidence: 95%

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Large Reduction in the a-axis Knight Shift on UTe₂ with T_c = 2.1 K

Cited by 30 publications

References 23 publications

A review of UTe₂at high magnetic fields

A review of UTe₂at high magnetic fields

Thermal conductivity of nonunitary triplet superconductors: application to UTe2

DataSheet1.pdf

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Large Reduction in the a-axis Knight Shift on UTe2 with Tc = 2.1 K

Cited by 30 publications

References 23 publications

A review of UTe2at high magnetic fields

A review of UTe2at high magnetic fields

Thermal conductivity of nonunitary triplet superconductors: application to UTe2

DataSheet1.pdf

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Large Reduction in the a-axis Knight Shift on UTe₂ with T_c = 2.1 K

A review of UTe₂at high magnetic fields

A review of UTe₂at high magnetic fields