Mott Transition and Superconductivity in Quantum Spin Liquid Candidate NaYbSe2

被引：37

作者：

Jia, Ya-Ting ^{[1
,2
]}

Gong, Chun-Sheng ^{[3
,4
]}

Liu, Yi-Xuan ^{[3
,4
]}

Zhao, Jian-Fa ^{[1
]}

Dong, Cheng ^{[5
]}

Dai, Guang-Yang ^{[1
]}

Li, Xiao-Dong ^{[6
]}

Lei, He-Chang ^{[3
,4
]}

Yu, Run-Ze ^{[1
]}

Zhang, Guang-Ming ^{[7
,8
,9
]}

Jin, Chang-Qing ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100190, Peoples R China

[3] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

[4] Renmin Univ China, Beijing Key Lab Optoelect Funct Mat & Micronano D, Beijing 100872, Peoples R China

[5] Peking Univ, Shenzhen Grad Sch, Sch Adv Mat, Shenzhen 518055, Peoples R China

[6] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China

[7] Tsinghua Univ, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China

[8] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[9] Frontier Sci Ctr Quantum Informat, Beijing 100084, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2020年 / 37卷 / 09期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

74; 25; Fy; Dw; 62; Fj; 73; 43; Nq; ELECTRON; STATE;

D O I：

10.1088/0256-307X/37/9/097404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Mott transition is one of the fundamental issues in condensed matter physics, especially in the system with antiferromagnetic long-range order. However, such a transition is rare in quantum spin liquid (QSL) systems without long-range order. Here we report the experimental pressure-induced insulator to metal transition followed by the emergence of superconductivity in the QSL candidate NaYbSe(2)with a triangular lattice of 4fYb(3+)ions. Detail analysis of transport properties in metallic state shows an evolution from non-Fermi liquid to Fermi liquid behavior when approaching the vicinity of superconductivity. An irreversible structure phase transition occurs around 11 GPa, which is revealed by the x-ray diffraction. These results shed light on the Mott transition in the QSL systems.

引用

页数：6

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