Single-layer Mo5Te8 — A new polymorph of layered transition-metal chalcogenide

Zhang，Junqiu1; Xia，Yipu1; Wang，Bo2; Jin，Yuanjun1,3; Tian，Hao1,3; Ho，Wing kin1; Xu，Hu3; Jin，Chuanhong2; Xie，Maohai1

2021

10.1088/2053-1583/abbc60

2D Materials   影响因子和分区

2053-1583

2053-1583

Single-layer (SL) transition-metal chalcogenides (TMCs) represent an important family of two-dimensional (2D) materials that have attracted intensive research attention recently. It has been established that many TMCs are polymorphic that can exist in different crystal structures and correspondingly exhibit diverse physical properties. Discovery of new structural phases of a crystal is of great scientific and practical importance. In this work, we report a new polymorph of SL-TMC, i.e. SL-MoTe, attained by molecular-beam epitaxy (MBE). Like the 1H-MoTe, it possesses the hexagonal symmetry but a much larger unit cell with a basis containing as many as 39 atoms (15 Mo and 24 Te). We call it the variational hexagonal (v1H) phase. Coincidently, it may be viewed also as one containing the highest density possible of mirror-twin domain boundaries (MTBs) in an otherwise pristine 1H-MoTe. Electronically, it is metallic and a comparison between theory and experiments of its density-of-states (DOS) at the Fermi level reveals features pointing to an importance of electron interactions that invites further investigations.

MBE Polymorphism STM Transition-metal chalcogenides Two-dimensional materials

SCI ; EI

英语

其他

Research Grant Council (RGC), Hong Kong Special Administrative Region (HKSAR)[C7036-17W] ; NSFC/RGC joint research grant from the RGC, HKSAR[N_HKU732/17][51761165024] ; National Natural Science Foundation of China[51761165024][51772265][61721005] ; National Basic Research Program of China[2015CB921004] ; Zhejiang Provincial Natural Science Foundation[D19E020002] ; 111 project[B16042]

Materials Science

Materials Science, Multidisciplinary

WOS:000577197100001

IOP PUBLISHING LTD

20204509444000

Chalcogenides ; Molecular beam epitaxy ; Transition metals

Metallurgy and Metallography:531 ; Inorganic Compounds:804.2 ; Atomic and Molecular Physics:931.3 ; Crystal Growth:933.1.2 ; Materials Science:951

2-s2.0-85094820934

Scopus

1.Physics Department,University of Hong Kong,Pokfulam Road,Hong Kong
2.State Key Laboratory of Silicon Materials,School of Materials and Engineering,Zhejiang University,Hangzhou, Zhejiang,310027,China
3.Department of Physics,Southern University of Science and Technology,Shenzhen, Guangdong,518055,China

Zhang，Junqiu,Xia，Yipu,Wang，Bo,等. Single-layer Mo5Te8 — A new polymorph of layered transition-metal chalcogenide[J]. 2D Materials,2021,8(1).

Zhang，Junqiu.,Xia，Yipu.,Wang，Bo.,Jin，Yuanjun.,Tian，Hao.,...&Xie，Maohai.(2021).Single-layer Mo5Te8 — A new polymorph of layered transition-metal chalcogenide.2D Materials,8(1).

Zhang，Junqiu,et al."Single-layer Mo5Te8 — A new polymorph of layered transition-metal chalcogenide".2D Materials 8.1(2021).