Pressure-induced anomalous evolution of charge density waves and superconductivity in Bi2Rh3Se2

Fei Jiao; Jiayang Li; Shuyang Wang; Chao An; Min Zhang; Xuliang Chen; Ying Zhou; Lili Zhang; Yimin Xiong; Yonghui Zhou; Ning Hao; Zhaorong Yang

doi:10.1103/PhysRevB.111.195160

Pressure-induced anomalous evolution of charge density waves and superconductivity in Bi2Rh3Se2

Fei Jiao, Jiayang Li, Shuyang Wang, Chao An, Min Zhang, Xuliang Chen, Ying Zhou, Lili Zhang, Yimin Xiong, Yonghui Zhou, Ning Hao, Zhaorong Yang

DOI 10.1103/PhysRevB.111.195160 · Physical Review B

T1

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Abstract

Layered parkerite-type ternary chalcogenide Bi2Rh3Se2, featuring one-dimensional (1D) Rh-Rh chains, exhibits the coexistence of bulk superconductivity (SC) and charge-density-wave (CDW) order at ambient pressure. Here, we report an exceptional evolution of CDW and SC in pressurized Bi2Rh3Se2. Upon compression, the CDW demonstrates a dome-shaped behavior that peaks at a critical pressure Pc1 of ∼12 GPa, while the SC concurrently displays a valley-shaped evolution, indicating a competitive relationship between the two electronic orders. Theoretical calculations suggest that the unusual CDW evolution can be attributed to a nonmonotonic variation of the predominant Fermi surface nesting, along with an enhancement of the minority momentum-dependent electron-phonon coupling. Above Pc2∼33GPa, the valley-shaped SC plateaus at the superconducting transition temperature Tc∼2.33K, which can be attributed to a dimensional crossover from a quasi-2D to a 3D structure. Our findings demonstrate that the layered Bi2Rh3Se2 provides an ideal platform for understanding a novel competing pathway between CDW and bulk SC, where the pressure-driven dome-shaped CDW is concurrent with an anticorrelated SC.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Rh3Se2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.87	Pressure unresolved	onset
Bi2Rh3Se2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.7	Pressure unresolved	unknown
Bi2Rh3Se2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.74	1.1 GPa	onset
Bi2Rh3Se2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.11	1.1 GPa	zero_resistance
Bi2Rh3Se2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.35	14.4 GPa	onset
Bi2Rh3Se2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.33	38.5 GPa	onset