Pressure-driven superconducting dome in the vicinity of CDW in the pyrite-type superconductor 
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Shi, Lifen; Liu, Z. Y.; Li, J.; Zhang, Xiaoxiao; Wang, N. N.; Qi, Caixia; Chen, K. Y.; Liu, Q. Y.; Yang, Pengtao; Sun, J. P.; Wang, B. S.; Uwatoko, Yoshiya; Sui, Yi; Yang, Huai; Cheng, Jinguang

doi:10.1103/physrevmaterials.6.014802

Cited by 8 publications

(4 citation statements)

References 29 publications

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“…The phase diagram of superconducting and CDW states for Bi 2 Rh 3 Se 2 against pressure is shown in Figure , suggesting the existence of exotic physical nature hidden in this material. In addition, the phase diagram is consistent with those reported for various materials with both the superconducting and CDW states. − …”

Section: Resultssupporting

confidence: 85%

“…In addition, the application of pressure to Ba 1– x Cs x Ti 2 Sb 2 O suppressed the CDW state to support the superconducting transition . Moreover, many reports on the suppression of CDW-ordered state and the simultaneous enhancement of T c through the application of pressure have been published. − From these results, we assumed that the T c increased via the suppression of the CDW state by applying pressure.…”

Section: Resultsmentioning

confidence: 98%

“…The calculation of DOS is necessary for the clarification of the relation between β and T c as a future task. Thus, the origin of a dome-like T c – p behavior remains to be clarified, but such a dome-shaped T c – p behavior is common for various exotic superconductors when the superconducting state appears in the vicinity of SDW and CDW, like CuS 2 and FeSe. , …”

Section: Resultsmentioning

confidence: 99%

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Pressure Dependence of Superconductivity in a Charge-Density-Wave Superconductor Bi₂Rh₃Se₂

et al. 2023

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The structural and superconducting properties of a Bi-based compound, Bi2Rh3Se2, are investigated over a wide pressure range. Bi2Rh3Se2 is a superconductor with a superconducting transition temperature, T c, of 0.7 K. This compound is in a charge-density-wave (CDW) state below 240 K, which implies the coexistence of superconducting and CDW states at low temperatures. Here, the superconducting properties of Bi2Rh3Se2 are studied from the perspective of the temperature dependence of electrical resistance (R) at high pressures (p’s). The pressure dependence of T c of Bi2Rh3Se2 shows a slow increase in T c at 0–15.5 GPa, and the T c slowly decreases with pressure above 15.5 GPa, which is markedly different from that of normal superconductors because the value of T c should simply decrease owing to the decrease in density of states (DOS) on the Fermi level, N(εF), driven by a simple shrinkage of the lattice under pressure. To ascertain the origin of such a dome-like T c–p behavior, the crystal structure of Bi2Rh3Se2 was explored over a wide pressure range of 0–20 GPa on the basis of powder X-ray diffraction; no structural phase transitions or simple shrinkage of the lattice was observed. This result implies that the increase in T c against pressure cannot simply be explained from a structural point of view. In other words, a direct relation between superconductivity and crystal structure was not found. On the other hand, the CDW transition became ambiguous at pressures higher than 3.8 GPa, suggesting that the T c had been suppressed by the CDW transition in a low pressure range. Thus, the findings suggest that for Bi2Rh3Se2, T c is enhanced through the suppression of CDW transition, which may be reasonable because the CDW-ordered state restrains the charge fluctuation to weaken the electron–phonon coupling and opens the gap to decrease the density of states on the Fermi level. The obtained dome-like T c–p behavior indicates the possibility of Bi2Rh3Se2 being an exotic superconductor.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

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Pressure Dependence of Superconductivity in a Charge-Density-Wave Superconductor Bi₂Rh₃Se₂

et al. 2023

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“…Firstly, for both ScV 6 Sn 6 and A V 3 Sb 5 , irrespective of their distinct forms of CDW, as mentioned above, high pressure effectively suppresses the CDW transition. This trend is commonly observed in many other CDW materials, such as the transition-metal dichalcogenides [ 45 , 46 , 47 ]. The effect of pressure on CDW can be generally understood by considering the impacts of lattice compression, which reduce the charge modulations and weaken the Fermi surface nesting by shortening the interatomic distances and bandwidth broadening.…”

Section: Discussionsupporting

confidence: 56%

Destabilization of the Charge Density Wave and the Absence of Superconductivity in ScV6Sn6 under High Pressures up to 11 GPa

et al. 2022

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RV6Sn6 (R = Sc, Y, or rare earth) is a new family of kagome metals that have a similar vanadium structural motif as AV3Sb5 (A = K, Rb, Cs) compounds. Unlike AV3Sb5, ScV6Sn6 is the only compound among the series of RV6Sn6 that displays a charge density wave (CDW) order at ambient pressure, yet it shows no superconductivity (SC) at low temperatures. Here, we perform a high-pressure transport study on the ScV6Sn6 single crystal to track the evolutions of the CDW transition and to explore possible SC. In contrast to AV3Sb5 compounds, the CDW order of ScV6Sn6 can be suppressed completely by a pressure of about 2.4 GPa, but no SC is detected down to 40 mK at 2.35 GPa and 1.5 K up to 11 GPa. Moreover, we observed that the resistivity anomaly around the CDW transition undergoes an obvious change at ~2.04 GPa before it vanishes completely. The present work highlights a distinct relationship between CDW and SC in ScV6Sn6 in comparison with the well-studied AV3Sb5.

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Experimental Investigation of Superconductivity in PdSSe Under High Pressure

Liu,

Zhao,

Song

et al. 2024

Adv Elect Materials

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Analysis of the superconducting properties of transition metal dichalcogenides (TMDs) under high pressures offers valuable insights to guide the design and synthesis of high‐performance superconducting materials. Herein, the effect of pressure is investigated on the superconductivity of a typical van der Waals layered TMDs material, PdSSe, by measuring its transport properties. After initially increased pressure, superconductivity emerges at 10.2 GPa, with a critical superconducting temperature (Tc) of ≈5.1 K, accompanied by the diminishing charge density wave (CDW) that is originally strengthening. Then, the Tc gradually increases with increasing pressure, reaching 12.1 K at the maximum pressure. The study provides experimental evidence for the superconductivity of PdSSe, and to the best of the knowledge, this is the first report on the observation of amplified CDW phenomena under increasing pressure in nonmagnetic TMDs. The abnormal enhancement of CDW transition temperature at low pressure is consistent with the upward trend of resistance, which is related to the electron–electron interaction. Moreover, synchrotron X‐ray diffraction experiments reveal two additional structural phase transitions.

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Pressure-driven superconducting dome in the vicinity of CDW in the pyrite-type superconductor CuS2

Cited by 8 publications

References 29 publications

Pressure Dependence of Superconductivity in a Charge-Density-Wave Superconductor Bi₂Rh₃Se₂

Pressure Dependence of Superconductivity in a Charge-Density-Wave Superconductor Bi₂Rh₃Se₂

Destabilization of the Charge Density Wave and the Absence of Superconductivity in ScV6Sn6 under High Pressures up to 11 GPa

Experimental Investigation of Superconductivity in PdSSe Under High Pressure

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Pressure-driven superconducting dome in the vicinity of CDW in the pyrite-type superconductor CuS2

Cited by 8 publications

References 29 publications

Pressure Dependence of Superconductivity in a Charge-Density-Wave Superconductor Bi2Rh3Se2

Pressure Dependence of Superconductivity in a Charge-Density-Wave Superconductor Bi2Rh3Se2

Destabilization of the Charge Density Wave and the Absence of Superconductivity in ScV6Sn6 under High Pressures up to 11 GPa

Experimental Investigation of Superconductivity in PdSSe Under High Pressure

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Pressure Dependence of Superconductivity in a Charge-Density-Wave Superconductor Bi₂Rh₃Se₂

Pressure Dependence of Superconductivity in a Charge-Density-Wave Superconductor Bi₂Rh₃Se₂