Perspective on muon-spin rotation/relaxation under hydrostatic pressure

Khasanov, R.

doi:10.1063/5.0119840

Cited by 12 publications

(3 citation statements)

References 93 publications

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“…42 Experiments under the quasi-hydrostatic pressure conditions were conducted at the µE1 beamline using the GPD spectrometer. 43,44 A pressure up to ≃ 2.3 GPa was generated in a double-walled clamp type cell made of nonmagnetic MP35N alloy. 43 As a pressure transmitting medium, Daphne 7373 oil was used.…”

Section: B µSr Experimentsmentioning

confidence: 99%

Pressure-Induced Split of the Density Wave Transitions in La3Ni2O7-δ

Khasanov,

Hicken,

Gawryluk

et al. 2024

Preprint

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The unveiling of superconductivity in La3Ni2O7-δ under pressure, following the suppression of a high-temperature density wave (DW) state, has attracted considerable attention. Notably, the nature of this competing DW order remains elusive, presenting a crucial question that demands further investigation. Here, we employ the muon-spin rotation/relaxation (μSR) technique combined with dipole-field numerical analysis to probe the magnetic response of La3Ni2O7-δ as a function of hydrostatic pressure. At ambient pressure, μSR experiments reveal commensurate static magnetic order below TN ∼ 151K. The comparison of the observed internal magnetic fields with dipole-field calculations reveals the magnetic structure's compatibility with a stripe-type arrangement of Ni moments (∼ 0.3-0.7μB), characterized by alternating lines of magnetic moments and non-magnetic stripes. Experiments under pressure (up to ∼ 2.3 GPa) demonstrate an increase of the magnetic ordering temperature at a rate dTN/dp ∼ 2.8 K/GPa. This trend is opposite in sign and significantly smaller in magnitude compared to the changes observed in the DW order of unknown origin reported by Wang et al. [arXiv:2309.17378]. Our findings reveal that the ground state of the La3Ni2O7-δ system is characterized by the coexistence of two distinct orders — the spin density wave and, most likely, charge density wave — with a notable pressure-induced separation between them.

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Section: B µSr Experimentsmentioning

confidence: 99%

Pressure-Induced Split of the Density Wave Transitions in La3Ni2O7-δ

Khasanov,

Hicken,

Gawryluk

et al. 2024

Preprint

Self Cite

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“…Thus, the experiment [1,3,25] remains the final criterion. Therefore, the confirmation of the predicted T c in order to determine the other fundamental ground-state parameters, including the upper critical field, B c2 (0); the lower critical field, B c1 (0) [12,22]; the self-field critical current density, J c (s f , T) [24,[82][83][84]; the London penetration depth, λ(0) [22,23,85,86]; the superconducting energy gap amplitude, ∆(0) [87][88][89]; and gap symmetry [90,91]; is the task of the experiment and the data analysis.…”

Section: Introductionmentioning

confidence: 97%

Quantifying the Nonadiabaticity Strength Constant in Recently Discovered Highly Compressed Superconductors

Talantsev

2023

Symmetry

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Superconductivity in highly pressurized hydrides has become the primary direction for the exploration of the fundamental upper limit of the superconducting transition temperature, Tc, after Drozdov et al. (Nature 2015, 525, 73) discovered a superconducting state with Tc=203 K in highly compressed sulfur hydride. To date, several dozen high-temperature superconducting polyhydrides have been discovered and, in addition, it was recently reported that highly compressed titanium and scandium exhibit record-high Tc (up to 36 K). This exceeded the Tc=9.2 K value of niobium many times over, which was the record-high Tc ambient pressure metallic superconductor. Here, we analyzed the experimental data for the recently discovered high-pressure superconductors (which exhibit high transition temperatures within their classes): elemental titanium (Zhang et al., Nature Communications 2022; Liu et al., Phys. Rev. B 2022), TaH3 (He et al., Chinese Phys. Lett. 2023), LaBeH8 (Song et al., Phys. Rev. Lett. 2023), black phosphorous (Li et al., Proc. Natl. Acad. Sci. 2018; Jin et al., arXiv 2023), and violet (Wu et al., arXiv 2023) phosphorous to reveal the nonadiabaticity strength constant TθTF (where Tθ is the Debye temperature, and TF the Fermi temperature) in these superconductors. The analysis showed that the δ-phase of titanium and black phosphorous exhibits TθTF scores that are nearly identical to those associated with A15 superconductors, while the studied hydrides and violet phosphorous exhibit constants in the same ballpark as those of H3S and LaH10.

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Section: Introductionmentioning

confidence: 99%

Quantifying the Nonadiabaticity Strength Constant in Recently Discovered Highly-Compressed Superconductor

Talantsev¹

2023

Preprint

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Superconductivity in highly-pressurized hydrides became primary direction for the exploration of fundamental upper limit for the superconducting transition temperature, Tc, after Drozdov et al (Nature 2015, 525, 73) discovered superconducting state with Tc=203 K in highly-compressed sulphur hydride. To date several dozens of high-temperature superconducting polyhydrides have been discovered and, recently, it was reported that highly-compressed titanium and scandium exhibit record-high Tc (up to 36 K), which is by manifold exceeded Tc=9.2 K of niobium, which is the record high-Tc ambient pressure metallic superconductor. Here we analysed experimental data on for recently discovered high-pressure superconductors (which exhibit high transition temperatures within their classes): elemental titanium (Zhang et al, Nature Communications 2022; Liu et al, Phys. Rev. B 2022), TaH3 (He et al, Chinese Phys. Lett. 2023), LaBeH8 (Song et al, Phys. Rev. Lett. 2023), and black (Li et al, Proc. Natl. Acad. Sci. 2018) and violet (Wu et al, arXiv 2023) phosphorous, to reveal the nonadiabaticity strength constant, TθTF (where Tθ is the Debye temperature, and TF the Fermi temperature) in these superconductors. The analysis showed that δ-phase of titanium and black phosphorous exhibit the Tθ/TF which are nearly identical to ones associated in A15 superconductors, while studied hydrides and violet phosphorous exhibit the constants in the same ballpark with H3S and LaH10.

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Perspective on muon-spin rotation/relaxation under hydrostatic pressure

Cited by 12 publications

References 93 publications

Pressure-Induced Split of the Density Wave Transitions in La3Ni2O7-δ

Pressure-Induced Split of the Density Wave Transitions in La3Ni2O7-δ

Quantifying the Nonadiabaticity Strength Constant in Recently Discovered Highly Compressed Superconductors

Quantifying the Nonadiabaticity Strength Constant in Recently Discovered Highly-Compressed Superconductor

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