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Monolayer (ML) transition-metal dichalcogenides exist in different phases, such as the hexagonal (2H) and distorted octahedral or monoclinic (1T') phases. The different structures show vastly different properties. For example, the 2H MoTe2…

Materials Science · Physics 2017-04-26 Jinglei Chen , Guanyong Wang , Yanan Tang , Jinpeng Xu , Xianqi Dai , Jinfeng Jia , Wingkin Ho , Maohai Xie

One-dimensional (1D) metallic mirror-twin boundaries (MTBs) in monolayer transition metal dichalcogenides (TMDCs) exhibit a periodic charge modulation and provide an ideal platform for exploring collective electron behavior in the confined…

Materials Science · Physics 2020-07-21 Li Wang , Ying Wu , Yayun Yu , Aixi Chen , Huifang Li , Wei Ren , Shuai Lu , Sunan Ding , Hui Yang , Qi-Kun Xue , Fang-Sen Li , Guang Wang

While new species and properties of two-dimensional (2D) materials are being reported with extraordinary regularity, a significant bottleneck in the field is the ability to controllably process material into working devices. We report a…

We present a combined experimental and theoretical study of monolayer VTe2 grown on highly oriented pyrolytic graphite by molecular-beam epitaxy. Using various in-situ microscopic and spectroscopic techniques, including scanning tunneling…

Monolayer group-V transition metal dichalcogenides in their 1T phase have recently emerged as a platform to investigate rich phases of matter, such as spin liquid and ferromagnetism, resulting from strong electron correlations. Although 1T…

Strongly Correlated Electrons · Physics 2021-11-23 Mengke Liu , Joshua Leveillee , Shuangzan Lu , Jia Yu , Hyunsue Kim , Keji Lai , Chendong Zhang , Feliciano Giustino , Chih-Kang Shih

The stacked two layered materials with a lattice constant mismatch and/or with twist angle relative to each other can create a moir\'e pattern, modulating the electronic properties of the pristine materials. Here, we combine scanning…

Magnetic doping of 2D materials such as Transition Metal Dichalcogenides is promising for the enhancement of magneto-optical properties, as it was previously observed for 3D diluted magnetic semiconductors. To maximize the effect of…

Materials Science · Physics 2023-09-15 Julia Kucharek , Rafał Bożek , Wojciech Pacuski

Transition metal dichalcogenides (TMDCs) monolayers, as two-dimensional (2D) direct bandgap semiconductors, hold promise for advanced optoelectronic and photocatalytic devices. Interaction with three-dimensional (3D) metals, like Au,…

Mesoscale and Nanoscale Physics · Physics 2024-04-16 Tao Yang , Stephan Sleziona , Erik Pollmann , Eckart Hasselbrink , Peter Kratzer , Marika Schleberger , R. Kramer Campen , Yujin Tong

Studying the atomic structure of intrinsic defects in two-dimensional transition metal dichalcogenides is difficult since they damage quickly under the intense electron irradiation in transmission electron microscopy (TEM). However, this…

Two-dimensional (2D) transition metal dichalcogenides (TMDs) are prospective materials for quantum devices owing to their inherent 2D confinements. They also provide a platform to realize even lower-dimensional in-plane electron…

Mesoscale and Nanoscale Physics · Physics 2019-12-19 Ziqian Wang , Ruichun Luo , Isaac Johnson , Hamzeh Kashani , Mingwei Chen

Density-functional calculations are used to identify one-atom-thick metallic In overlayers on the Si(111) surface, which have long been sought in quest of the ultimate two-dimensional (2D) limit of free-electron-like metallic properties. We…

Materials Science · Physics 2016-09-14 Jae Whan Park , Myung Ho Kang

Polymorphic structures of transition-metal dichalcogenides (TMDs) host exotic electronic states, like charge density wave and superconductivity. However, the number of these structures is limited by crystal symmetries, which poses a…

Materials Science · Physics 2024-05-31 Le Lei , Jiaqi Dai , Haoyu Dong , Yanyan Geng , Feiyue Cao , Cong Wang , Rui Xu , Fei Pang , Fangsen Li , Zhihai Cheng , Guang Wang , Wei Ji

Two-dimensional (2D) transition metal dichalcogenides MX2 (M = Mo, W, X = S, Se, Te) attracts enormous research interests in recent years. Its 2H phase possesses an indirect to direct bandgap transition in 2D limit, and thus shows great…

Two-dimensional (2D) materials are among the most promising candidates for next-generation electronics due to their atomic thinness, allowing for flexible transparent electronics and ultimate length scaling. Thus far, atomically-thin p-n…

Two-dimensional (2D) materials are a new class of materials with interesting physical properties and ranging from nanoelectronics to sensing and photonics. In addition to graphene, the most studied 2D material, monolayers of other layered…

Mesoscale and Nanoscale Physics · Physics 2013-06-25 Branimir Radisavljevic , Andras Kis

Properties of two-dimensional transition metal dichalcogenides are highly sensitive to the presence of defects in the crystal structure. A detailed understanding of defect structure may lead to control of material properties through defect…

The one-dimensional metallic states that appear at the zigzag edges of semiconducting two-dimensional transition metal di-chalcogenides (TMDCs) result from the intrinsic electric polarization in these materials, which for D$_{3h}$ symmetry…

Materials Science · Physics 2020-10-28 Sridevi Krishnamurthi , Mojtaba Farmanbar , Geert Brocks

To have a fully ab initio description of the Moir\'e pattern in a transition metal dichalcogenide heterobilayer, we have carried out density functional theory calculations, taking accounts of both atomic registry in and the lattice…

Materials Science · Physics 2020-02-03 W. T. Geng , V. Wang , Y. C. Liu , T. Ohno , J. Nara

Emergence of topological states in strongly correlated systems, particularly two-dimensional (2D) transition-metal dichalcogenides, offers a platform for manipulating electronic properties in quantum materials. However, a comprehensive…

When semiconducting transition metal dichalcogenides heterostructures are stacked the twist angle and lattice mismatch leads to a periodic moir\'e potential. As the angle between the layers changes, so do the electronic properties. As the…

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