Quantum Griffiths singularity in two-dimensional superconducting 4Ha-TaSe_(2) nanodevices

作     者：Ying Xing Yiyu Liu Pu Yang Jun Ge Longxin Pan Junyan Wang Shichao Qi Yi Liu Jian Wang Ying Xing;Yiyu Liu;Pu Yang;Jun Ge;Longxin Pan;Junyan Wang;Shichao Qi;Yi Liu;Jian Wang

作者机构：State Key Laboratory of Heavy Oil ProcessingCollege of New Energy and MaterialsChina University of Petroleum(Beijing)Beijing 102249China International Center for Quantum MaterialsSchool of PhysicsPeking UniversityBeijing 100871China College of ChemistryBeijing Normal UniversityBeijing 100875China Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials&Micro-nano DevicesRenmin University of ChinaBeijing 100872China Collaborative Innovation Center of Quantum MatterBeijing 100871China Hefei National LaboratoryHefei 230088China Beijing Academy of Quantum Information SciencesBeijing 100193China CAS Center for Excellence in Topological Quantum ComputationUniversity of Chinese Academy of SciencesBeijing 100190China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2023年第16卷第10期

页      面：12281-12285页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(Nos.11888101,11974430,and 12174442) the National Key R&D Program of China(Nos.2018YFA0305600 and 2022YFA1403103) the Strategic Priority Research Program of Chinese Academy of Sciences(No.XDB28000000) the Innovation Program for Quantum Science and Technology(No.2021ZD0302400) Young Elite Scientists Sponsorship Program by BAST(No.BYESS2023452) the Fundamental Research Funds for the Central Universities,and the Research Funds of Renmin University of China(No.22XNKJ20) 

主　　题：two-dimensional superconductor quantum phase transition quantum Griffiths singularity transition metal dichalcogenides electrical transport property 

摘      要：The layered transition metal dichalcogenides(TMDs)have raised considerable interest in the past decades for both fundamental physics and low-dimensional nanodevice ***,intriguing phenomena of Ising superconductivity and quantum metallic state have been reported in two-dimensional(2D)4Ha-TaSe2 ***,we report the magnetic field induced superconductor–metal transition(SMT)in mechanical exfoliated 4Ha-TaSe2 nanodevices with thickness down to 2.5 *** observe the quantum Griffiths singularity(QGS)of SMT in thin 4Ha-TaSe2 nanodevices by performing ultralow temperature transport measurements and activated scaling *** increasing the thickness of TaSe2 nanodevice to 10.6 nm,the signature of magnetoresistance crossing region can hardly be detected,revealing the thickness dependence of *** this procedure,the disorder strength plays a dominant *** work enriches the platform for studying QGS and may stimulate further investigations on the correlation between different novel quantum phenomena in the same 2D superconducting system.