The retention at ambient of the high-pressure-induced metastable superconducting phases in antimony single crystals

Wu, Zheng; Deng, Liangzi; Gooch, Melissa; Huyan, Shuyuan; Chu, C. W.

doi:10.1016/j.mtphys.2020.100291

Cited by 11 publications

(3 citation statements)

References 10 publications

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“…Surprisingly, the SC is persistent in the whole decompression process. When the pressure is released down to ambient pressure, the SC state is retained with T c = 2.9 K, which is the highest T c in the polytypes of TaSe 2 under ambient pressure. , Recently, some irreversible SC studies through different routes have been reported under pressure and the retention of the SC state is explained by different mechanisms, including the retention of the high-pressure metastable phase or the pressure-manipulated crystal quality. − …”

Section: Resultsmentioning

confidence: 97%

Retainable Superconductivity and Structural Transition in 1T-TaSe₂ Under High Pressure

et al. 2021

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As a prominent platform possessing the properties of superconductivity (SC) and charge density wave (CDW), transition-metal dichalcogenides (TMDCs) have attracted considerable attention for a long time. Moreover, extensive efforts have been devoted for exploring the SC and/or the interplay between SC and CDW in TMDCs in the past few decades. Here, we systematically investigate the electronic properties and structural evolution of 1T-TaSe 2 under pressure. With increasing pressure, pressure-induced superconductivity is observed at ∼2.6 GPa. The superconductive transition temperature (T c ) increases with the suppression of the CDW state to the maximum value of ∼5.1 K at 21.8 GPa and then decreases monotonously up to the highest pressure of 57.8 GPa. 1T-TaSe 2 transforms into a monoclinic C2/m structure above 19 GPa. The monoclinic phase coexists with the original phase as the pressure is released under ambient conditions and the retainable superconductivity with T c = 2.9 K is observed in the released sample. We suggest that the retained superconductivity can be ascribed to the retention of the superconductive highpressure monoclinic phase in the released sample. Our findings demonstrate that both the structure and CDW order are related to the superconductivity of TaSe 2 .

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Section: Resultsmentioning

confidence: 97%

Retainable Superconductivity and Structural Transition in 1T-TaSe₂ Under High Pressure

et al. 2021

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“…How superconductivity achieved by the high pressure approach can be retained upon decompression to low or even ambient pressure remains a great challenge and is on demand. However, the recent example of antimony suggests that the pressure-induced metastable superconducting phases can be retained by following a specific thermodynamic path owing to the associated latent heat of the first-order phase transitions [24]. In the case of Ge 2 Sb 2 Te 5 , the difference in the structure of the starting phase leads to a distinct phase sequence on the compression-decompression cycle even though the highpressure phase is nominally the same manifesting the phase memory effect [15].…”

Section: Introductionmentioning

confidence: 99%

Memory of pressure-induced superconductivity in a phase-change alloy

et al. 2021

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The application of pressure has been speculated to boost the search for high-temperature superconductors, especially in superhydrides. However, the applied pressure as high as hundreds of GPa needed to create superconductivity in those materials limits their technological application. Finding a route to achieve the high-temperature superconductivity at near-ambient conditions is attractive. By choosing a phase-change alloy Ge 2 Sb 2 Te 5 , we study the phase evolution of this material with pressure from the trigonal phase through the amorphous to the body-centered cubic one by the measurements of x-ray diffraction, Raman scattering, resistivity, and Hall coefficient. Superconductivity is observed to take place in the last two phases and can maintain at nearly ambient pressure in the decompression run. Pressure-induced disorder is found to be the key for holding superconductivity in the compressed phase-change alloy.

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“…The pressure-enhanced or -induced SC phase with a high Tc may be considered metastable or supercool and may be stabilized. Last year we retained two SC phases with Tcs ~ 3.4 K and 4.0 K from 9 and 30 GPa, respectively, in non-SC elemental Sb 14 . Here we report the first successful retention of pressure-enhanced andinduced SC phases at ambient in the Fe-based HTSs via PQ at a chosen quench-pressure (PQ) and quench-temperature (TQ), i.e., a pressure-enhanced SC phase with a Tc up to 37 K at PQ = 4.15 GPa and TQ = 4.2 K in the SC FeSe and a pressure-induced SC phase with a Tc up to 26.5 K at PQ = 6.32 GPa and TQ = 4.2 K in the non-SC Cu-doped FeSe.…”

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confidence: 99%

Pressure-induced high-temperature superconductivity retained without pressure in FeSe single crystals

Deng

Bontke

Dahal

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

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To raise the superconducting-transition temperature (Tc) has been the driving force for the long-sustained effort in superconductivity research. Recent progress in hydrides with Tcs up to 287 K under pressure of 267 GPa has heralded a new era of room temperature superconductivity (RTS) with immense technological promise. Indeed, RTS will lift the temperature barrier for the ubiquitous application of superconductivity. Unfortunately, formidable pressure is required to attain such high Tcs. The most effective relief to this impasse is to remove the pressure needed while retaining the pressure-induced Tc without pressure. Here, we show such a possibility in the pure and doped high-temperature superconductor (HTS) FeSe by retaining, at ambient pressure via pressure quenching (PQ), its Tc up to 37 K (quadrupling that of a pristine FeSe at ambient) and other pressure-induced phases. We have also observed that some phases remain stable without pressure at up to 300 K and for at least 7 d. The observations are in qualitative agreement with our ab initio simulations using the solid-state nudged elastic band (SSNEB) method. We strongly believe that the PQ technique developed here can be adapted to the RTS hydrides and other materials of value with minimal effort.

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The retention at ambient of the high-pressure-induced metastable superconducting phases in antimony single crystals

Cited by 11 publications

References 10 publications

Retainable Superconductivity and Structural Transition in 1T-TaSe₂ Under High Pressure

Retainable Superconductivity and Structural Transition in 1T-TaSe₂ Under High Pressure

Memory of pressure-induced superconductivity in a phase-change alloy

Pressure-induced high-temperature superconductivity retained without pressure in FeSe single crystals

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The retention at ambient of the high-pressure-induced metastable superconducting phases in antimony single crystals

Cited by 11 publications

References 10 publications

Retainable Superconductivity and Structural Transition in 1T-TaSe2 Under High Pressure

Retainable Superconductivity and Structural Transition in 1T-TaSe2 Under High Pressure

Memory of pressure-induced superconductivity in a phase-change alloy

Pressure-induced high-temperature superconductivity retained without pressure in FeSe single crystals

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Product

Resources

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Retainable Superconductivity and Structural Transition in 1T-TaSe₂ Under High Pressure

Retainable Superconductivity and Structural Transition in 1T-TaSe₂ Under High Pressure