Thermodynamic signatures of short-range magnetic correlations in 
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Willa, Kristin; Hardy, F.; Aoki, Dai; Li, Dexin; Wiecki, Paul; Lapertot, G.; Meingast, C.

doi:10.1103/physrevb.104.205107

Cited by 26 publications

(25 citation statements)

References 40 publications

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“…The slope for T * is ∂T * /∂P ∼ −5.8 K/GPa, which is in excellent agreement with the value of −6 K/GPa estimated from the thermal expansion and the electronic Grüneisen parameter, Γ e = −30. 22,24) The decrease of T * is also consistent with the results of resistivity measurements under pressure. 27) The rather high compressibility of UTe 2 leads to a volume reduction close to 3 % at 1.7 GPa, 28) which is a large volume change in condensed matter.…”

supporting

confidence: 87%

“…Note that recent magnetostriction experiments along the c-axis for H a, b and c-axes predict a switching of the easy-magnetization axis between a and baxis under uniaxial stress along c-axis. 24) The change from anisotropic to quasi-isotropic magnetic properties is also seen in the pressure dependence of the Weiss constants, Θ. The inverse magnetic susceptibilities follow a Curie-Weiss behavior χ = C/(T − Θ) at high temperatures for a, b and c-axes in all pressure range.…”

mentioning

confidence: 92%

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Magnetic Properties under Pressure in Novel Spin-Triplet Superconductor UTe2

Li,

Nakamura,

Honda

et al. 2021

Preprint

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We report the magnetic susceptibility and the magnetization under pressures up to 1.7 GPa above the critical pressure, P c ∼ 1.5 GPa, for H a, b and c-axes in the novel spin triplet superconductor UTe 2 . The anisotropic magnetic susceptibility at low pressure with the easy magnetization a-axis changes to the quasi-isotropic behavior at high pressure, revealing a rapid suppression of the susceptibility for a-axis, and a gradual increase of the susceptibility for the b-axis. At 1.7 GPa above P c , magnetic anomalies are detected at T MO ∼ 3 K and T WMO ∼ 10 K. The former anomaly corresponds to long-range magnetic order, most likely antiferromagnetism, while the latter shows a broad anomaly, which is probably due to the development of short range order. The unusual decrease and increase of the susceptibility below T WMO for H a and b-axes, respectively, indicate the complex magnetic properties at low temperatures above P c . This is related to the interplay between multiple fluctuations dominated by antiferromagnetism, ferroamgnetism, valence and Fermi surface instabilities.

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supporting

confidence: 87%

mentioning

confidence: 92%

Magnetic Properties under Pressure in Novel Spin-Triplet Superconductor UTe2

Li,

Nakamura,

Honda

et al. 2021

Preprint

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“…Interestingly, Γ H is almost identical to Γ T at T * . 51) This coincidence indicates that the low field short-range order is eliminated at H m .…”

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confidence: 82%

“…59) Recently, a different characteristic energy scale T * ≈ 12 K was also proposed. 51,[60][61][62][63] A broad peak-like anomaly appeared at T * in some thermodynamic quantities. 51) NMR studies for H || a have revealed some anomalies at both of T max χ and T * ; starting a broadening of NMR spectra below T max χ and a peak in the nuclear spinspin relaxation rate at T * .…”

mentioning

confidence: 98%

“…51,[60][61][62][63] A broad peak-like anomaly appeared at T * in some thermodynamic quantities. 51) NMR studies for H || a have revealed some anomalies at both of T max χ and T * ; starting a broadening of NMR spectra below T max χ and a peak in the nuclear spinspin relaxation rate at T * . 63) Thus, T * may correspond to the short-range ordering temperature.…”

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confidence: 98%

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Magnetovolume Effect on the First-Order Metamagnetic Transition in UTe$_2$

Miyake,

Gen,

Ikeda

et al. 2022

Preprint

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Chiral superconductivity in UTe2 probed by anisotropic low-energy excitations

et al. 2023

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Chiral spin-triplet superconductivity is a topologically nontrivial pairing state with broken time-reversal symmetry, which can host Majorana quasiparticles. The heavy-fermion superconductor UTe2 exhibits peculiar properties of spin-triplet pairing, and the possible chiral state has been actively discussed. However, the symmetry and nodal structure of its order parameter in the bulk, which determine the Majorana surface states, remains controversial. Here we focus on the number and positions of superconducting gap nodes in the ground state of UTe2. Our magnetic penetration depth measurements for three field orientations in three crystals all show the power-law temperature dependence with exponents close to 2, which excludes single-component spin-triplet states. The anisotropy of low-energy quasiparticle excitations indicates multiple point nodes near the ky- and kz-axes in momentum space. These results can be consistently explained by a chiral B3u + iAu non-unitary state, providing fundamentals of the topological properties in UTe2.

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Thermodynamic signatures of short-range magnetic correlations in UTe2

Cited by 26 publications

References 40 publications

Magnetic Properties under Pressure in Novel Spin-Triplet Superconductor UTe2

Magnetic Properties under Pressure in Novel Spin-Triplet Superconductor UTe2

Magnetovolume Effect on the First-Order Metamagnetic Transition in UTe$_2$

Chiral superconductivity in UTe2 probed by anisotropic low-energy excitations

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