Microscopic growth mechanism and edge states of monolayer 1T'-MoTe_(2)  

作　　者：赵海鹏 刘隐 杨胜国 林陈昉 陈明星 Kai Braun 罗心仪 李思宇 潘安练 王笑 Haipeng Zhao;Yin Liu;Shengguo Yang;Chenfang Lin;Mingxing Chen;Kai Braun;Xinyi Luo;Siyu Li;Anlian Pan;Xiao Wang(Key Laboratory for Micro-Nano Physics and Technology of Hunan Province,School of Physics and Electronics,College of Materials Science and Engineering,Hunan University,Changsha 410082,China;Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education,Synergetic Innovation Centre for Quantum Effects and Applications,Hunan Normal University,Changsha 410081,China;State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Institute of Physical and Theoretical Chemistry and LISA+,University of Tubingen,Auf der Morgenstelle 18,¨72076 Tubingen,Germany)

机构地区：[1]Key Laboratory for Micro-Nano Physics and Technology of Hunan Province,School of Physics and Electronics,College of Materials Science and Engineering,Hunan University,Changsha 410082,China [2]Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education,Synergetic Innovation Centre for Quantum Effects and Applications (SICQEA), Hunan Normal University,Changsha 410081,China [3]State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China [4]Institute of Physical and Theoretical Chemistry and LISA+,University of Tubingen,Auf der Morgenstelle 18,72076 Tubingen,Germany

出　　处：《Chinese Physics B》2024年第4期605-611,共7页中国物理B（英文版）

基　　金：Project supported by the National Key R&D Program of China (Grant No.2022YFA1204302);the National Natural Science Foundation of China (Grant Nos.52022029,52221001,92263107,U23A20570,62090035,U19A2090,and 12174098);the Hunan Provincial Natural Science Foundation of China (Grant Nos.2022JJ30142 and 2019XK2001);in part supported by the State Key Laboratory of Powder Metallurgy,Central South University。

摘　　要：Transition metal ditellurides(TMTDs)have versatile physical properties,including non-trivial topology,Weyl semimetal states and unique spin texture.Controlled growth of high-quality and large-scale monolayer TMTDs with preferred crystal phases is crucial for their applications.Here,we demonstrate the epitaxial growth of 1T'-MoTe_(2) on Au(111)and graphitized silicon carbide(Gr/SiC)by molecular beam epitaxy(MBE).We investigate the morphology of the grown1T'-MoTe_(2) at the atomic level by scanning tunnelling microscopy(STM)and reveal the corresponding microscopic growth mechanism.It is found that the unique ordered Te structures preferentially deposited on Au(111)regulate the growth of monolayer single crystal 1T'-MoTe_(2),while the Mo clusters were preferentially deposited on the Gr/SiC substrate,which impedes the ordered growth of monolayer MoTe_(2).We confirm that the size of single crystal 1T'-MoTe_(2) grown on Au(111)is nearly two orders of magnitude larger than that on Gr/SiC.By scanning tunnelling spectroscopy(STS),we observe that the STS spectrum of the monolayer 1T'-MoTe_(2) nano-island at the edge is different from that at the interior,which exhibits enhanced conductivity.

关 键 词：transition metal ditellurides 1T'-MoTe_(2) microscopic growth mechanism scanning tunneling microscopy/spectroscopy(STM/S) 

分 类 号：O469[理学—凝聚态物理] TB34[理学—电子物理学]