首页|Re-emergence of superconductivity via pressure-induced Lifshitz transition in preserved 6R-TaS2 crystal structure

Re-emergence of superconductivity via pressure-induced Lifshitz transition in preserved 6R-TaS2 crystal structure

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Re-emergence of superconductivity via pressure-induced Lifshitz transition in preserved 6R-TaS2 crystal structure
Investigating the implications of interlayer coupling on superconductivity is vital for comprehending the intrinsic mechanisms of two-dimensional materials.Van der Waals heterojunctions have attracted extensive research owing to their exotic interlayer cou-pling.In this study,we investigated the natural heterostructure superconductor featuring 6R-TaS2 via measurements of electrical resistance,the Hall effect,and in-situ synchrotron X-ray diffraction(XRD)under various pressures.The study findings show that the superconducting transition temperature(Tc)of 6R-TaS2 in the range of 0-32.5 GPa exhibits an unusual double-dome behavior as a function of pressure,with the first and second domes in the pressure range of 0-5.3 and 6.8-32.5 GPa,respectively.At 56.6 GPa,a new superconducting phase with a Tc of 2 K was observed.The XRD results show that the singular evolution of the Tc is independent of the structural phase transition.Combining the XRD results,first-principles calculations,and Hall effect mea-surements,we found that different interlayer coupling effects resulted in double dome superconductivity and the re-emergence of superconducting.Our findings shed light on the pivotal role of interlayer coupling in driving the anomalous alterations in superconducting properties triggered by charge transfer and Fermi surface reconstruction and provide an alternative route for comprehending the mechanisms of superconductivity in transition metal dichalcogenides(TMDs).

high-pressureLifshitz transitionre-emergence superconductinginterlayer couplingheterostructures

Xindeng Lv、Hao Song、Kun Chen、Sirui Liu、Yanping Huang、Yuqiang Fang、Zexiang Shen、Tian Cui

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Institute of High Pressure Physics,School of Physical Science and Technology,Ningbo University Ningbo 315211,China

State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China

Division of Physics and Applied Physics,School of Physical and Mathematical Sciences,Nanyang Technological University,Singapore 637371,Singapore

State Key Laboratory of Superhard Materials,College of Physics,Jilin University,Changchun 130012,China

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high-pressure Lifshitz transition re-emergence superconducting interlayer coupling heterostructures

2024

10.1007/s11433-024-2476-4

中国科学:物理学 力学 天文学(英文版)
中国科学院

中国科学:物理学 力学 天文学(英文版)

CSTPCD
影响因子：0.91
ISSN：1674-7348
年,卷(期)：2024.67(12)