Quantum Effects and Phase Tuning in Epitaxial Hexagonal and Monoclinic MoTe2 Monolayers
Source abstract
Abstract
Monolayer (ML) transition-metal dichalcogenides exist in different phases, such as hexagonal (2H) and monoclinic (1T′) structures. They show very different properties: semiconducting for 2H-MoTe 2 and semimetallic for 1T′-MoTe 2 . The formation energy difference between 2H- and 1T′-phase MoTe 2 is small, so there is a high chance of tuning the structures of MoTe 2 and thereby introducing applications of phase-change electronics. In this paper, we report the growth of both 2H- and 1T′-MoTe 2 MLs by molecular-beam epitaxy (MBE) and demonstrate its tenability by changing the conditions of MBE. We attribute the latter to an effect of Te adsorption. By scanning tunneling microscopy and spectroscopy, we reveal not only the atomic structures and intrinsic electronic properties of the two phases of MoTe 2 but also quantum confinement and quantum interference effects in the 2H- and 1T′-MoTe 2 domains, respectively, as effected by domain boundaries in the samples.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: 2D Materials and Applications · MXene and MAX Phase Materials · Graphene research and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Physics Department, The University of Hong Kong, Pokfulam Road, Hong Kong, China
Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, China
Innovation Center of Advanced Microstructures, Nanjing 210023, China
College of Physics and Electronic Engineering, Henan Normal University, Xinxiang, Henan 453007, China
School of Physics and Electronic Engineering, Zhengzhou Normal University, Zhengzhou, Henan 450044, China
Physics Department, South University of Science and Technology of China, Shenzhen 518055, China
Funding
Research Grants Council, University Grants Committee · Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China
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