Effect of Fermi surface topology change on the Kagome superconductor CeRu2 under pressure

Deng, Liangzi1,2; Gooch, Melissa1,2; Liu, Hongxiong3,4,5; Salke, Nilesh P.6; Bontke, Trevor1,2; Shao, Sen7; You, Jingyang8; Schulze, Daniel J.1,2; Kumar, Ravhi6; Yin, Jia-Xin9,14; Shi, Youguo3,4,5; Hemley, Russell J.6,10,11; Feng, Yuanping8,12; Chang, Guoqing7; Si, Qimiao13; Chu, Ching-Wu1,2

2024

10.1016/j.mtphys.2023.101322

MATERIALS TODAY PHYSICS   影响因子和分区

2542-5293

The cubic Laves phase compound CeRu2 with a Kagome substructure of Ru has been investigated to understand myriad fascinating phenomena resulting from competition among its various physical and geometric features. Such phenomena include flat bands, van Hove singularities, Dirac cones, reentrant superconductivity, magnetism, the Fulde-Ferrell-Larkin-Ovchinnikov state, valence fluctuations, time-irreversible anisotropic s-state superconductivity, etc. Extensive studies have thus been carried out since 1958 when the highly unusual coexistence of superconductivity and ferromagnetism was proposed for the mixed compounds (Ce,Gd)Ru2. Activity has accelerated in recent years due to increasing interest in topological states in superconductors. However, there has been little investigation of the mutual influence of these fascinating states. Therefore, we systematically investigated the superconductivity and possible Fermi surface topological change in CeRu2 via magnetic, resistivity, and structural measurements under pressure up to -168 GPa. An unusual phase diagram that suggests an intriguing interplay between the compound's superconducting order and Fermi surface topological order has been constructed. A resurgence in its superconducting transition temperature was observed above 28 GPa. Our experiments have identified a structural transition above 76 GPa and a few tantalizing phase transitions driven by high pressure. Our high-pressure results further suggest that superconductivity and Fermi surface topology in CeRu2 are strongly intertwined.

CeRu 2 Kagome superconductor Fermi surface topology Electronic topological transition High pressure

SCI

英语

其他

Nanyang Assistant Professorship grant from Nanyang Technological University[NRFF13-2021-0010] ; Ministry of Education, Singapore, under its MOE AcRF Tier 3 Award[MOE2018-T3-1-002] ; Robert A. Welch Foundation[FA9550-21-1-0356] ; null[C-1411]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:001149108300001

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Web of Science

1.Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA
2.Univ Houston, Dept Phys, Houston, TX 77204 USA
3.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Univ Illinois, Dept Phys, Chicago, IL 60607 USA
7.Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, Singapore City 637371, Singapore
8.Natl Univ Singapore, Dept Phys, Singapore City 117551, Singapore
9.Princeton Univ, Dept Phys, Lab Topol Quantum Matter & Adv Spect B7, Princeton, NJ 08544 USA
10.Univ Illinois, Dept Chem, Chicago, IL 60607 USA
11.Univ Illinois, Dept Earth & Environm Sci, Chicago, IL 60607 USA
12.Natl Univ Singapore, Ctr Adv 2D Mat, Singapore City 117546, Singapore
13.Rice Univ, Rice Ctr Quantum Mat, Dept Phys & Astron, Houston, TX 77005 USA
14.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China

Deng, Liangzi,Gooch, Melissa,Liu, Hongxiong,et al. Effect of Fermi surface topology change on the Kagome superconductor CeRu2 under pressure[J]. MATERIALS TODAY PHYSICS,2024,40.

Deng, Liangzi.,Gooch, Melissa.,Liu, Hongxiong.,Salke, Nilesh P..,Bontke, Trevor.,...&Chu, Ching-Wu.(2024).Effect of Fermi surface topology change on the Kagome superconductor CeRu2 under pressure.MATERIALS TODAY PHYSICS,40.

Deng, Liangzi,et al."Effect of Fermi surface topology change on the Kagome superconductor CeRu2 under pressure".MATERIALS TODAY PHYSICS 40(2024).