Microscopic growth mechanism and edge states of monolayer 1T'-MoTe2

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外文摘要：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 pre-ferred crystal phases is crucial for their applications.Here,we demonstrate the epitaxial growth of 1T'-MoTe2 on Au(111)and graphitized silicon carbide(Gr/SiC)by molecular beam epitaxy(MBE).We investigate the morphology of the grown 1T'-MoTe2 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'-MoTe2,while the Mo clusters were preferentially deposited on the Gr/SiC substrate,which impedes the ordered growth of monolayer MoTe2.We confirm that the size of single crystal lT'-MoTe2 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'-MoTe2 nano-island at the edge is different from that at the interior,which exhibits enhanced conductivity.

外文关键词：

transition metal ditellurides1T'-MoTe2microscopic growth mechanismscanning tunneling m croscopy/spectroscopy(STM/S)

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

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作者单位：

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(SICQEA),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 Tübingen,Aufder Morgenstelle 18,72076 Tübingen,Germany

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基金：

国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金湖南省自然科学基金湖南省自然科学基金State Key Laboratory of Powder Metallurgy,Central South University

项目编号：

2022YFA1204302520220295222100192263107U23A2057062090035U19A2090121740982022JJ301422019XK2001

出版年：

2024

DOI：

10.1088/1674-1056/ad16d5

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

年,卷(期)：2024.33(4)

参考文献量33