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Topological insulators are new class of materials which are characterized by a bulk band gap like ordinary band insulator but have protected conducting states on their edge or surface. These states emerge out due to the combination of…

Mesoscale and Nanoscale Physics · Physics 2017-08-18 Arijit Saha , Arun M. Jayannavar

Mechanical properties of transition metal dichalcogenides (TMDCs) are relevant to their prospective applications in flexible electronics. So far, the focus has been on the semiconducting TMDCs, mostly MoX2 and WX2 (X=S, Se) due to their…

Transition Metal Dichalcogenides (TMD) are layered materials obtained by stacking two-dimensional sheets weakly bonded by van der Waals interactions. In bulk TMD, band dispersions are observed in the direction normal to the sheet plane…

Two-dimensional (2D) Transition Metal Chalcogenides (TMCs) have attracted tremendous interest from both the scientific and technological communities due to their variety of properties and superior tunability through layer number,…

Materials Science · Physics 2022-03-09 Peijian Wang , Deren Yang , Xiaodong Pi

Two-dimensional (2D) materials like transition metal dichalcogenides (TMD) have proved to be serious candidates to replace silicon in several technologies with enhanced performances. In this respect, the two remaining challenges are the…

Since the discovery of graphene, a tremendous amount of two dimensional (2D) materials have surfaced. Their electronic properties can usually be well understood without considering correlations between electrons. On the other hand, strong…

One of important challenges in condensed-matter physics is to realize new quantum states of matter by manipulating the dimensionality of materials, as represented by the discovery of high-temperature superconductivity in atomic-layer…

Materials Science · Physics 2018-10-08 Yuki Umemoto , Katsuaki Sugawara , Yuki Nakata , Takashi Takahashi , Takafumi Sato

Transition metal dichalcogenide (TMDC) moir\'e superlattices, owing to the moir\'e flatbands and strong correlation, can host periodic electron crystals and fascinating correlated physics. The TMDC heterojunctions in the type-II alignment…

The layered semimetal WTe_2 has recently been found to be a two-dimensional topological insulator (2D TI) when thinned down to a single monolayer, with conducting helical edge channels. We report here that intrinsic superconductivity can be…

Moir\'e super-potentials in two-dimensional materials allow unprecedented control of the ratio between kinetic and interaction energy. By this, they pave the way to study a wide variety of strongly correlated physics under a new light. In…

Strongly Correlated Electrons · Physics 2022-01-03 Amir Dalal , Jonathan Ruhman

We present a detailed calculation of the linear and nonlinear optical response of four types of monolayer Two-Dimensional (2D) Transition-Metal Dichalcogenides (TMDCs), having the formula $\textrm{MX}_2$ with M=Mo,W and X=S,Se. The…

Mesoscale and Nanoscale Physics · Physics 2018-08-28 Sina Khorasani

The growth and exfoliation of two-dimensional (2D) materials have led to the creation of edges and novel interfacial states at the juncture between crystals with different composition or phases. These hybrid heterostructures (HSs) can be…

Mesoscale and Nanoscale Physics · Physics 2019-04-02 Oscar Ávalos-Ovando , Diego Mastrogiuseppe , Sergio E. Ulloa

Two-dimensional (2D) transition-metal dichalcogenide (TMD) MX$_2$ (M = Mo, W; X= S, Se, Te) possess unique properties and novel applications. In this work, we perform first-principles calculations on the van der Waals (vdW) stacked MX$_2$…

Two-dimensional transition metal trichalcogenides (TMTC's) feature covalently bonded metal-chalcogen layers separated by the van der Waals (vdW) gap. Similar to transition metal dichalcogenides (TMDCs), TMTCs often host charge density waves…

Strongly Correlated Electrons · Physics 2022-03-01 Yu Liu , Zhixiang Hu , Xiao Tong , Denis Leshchev , Xiangde Zhu , Hechang Lei , Eli Stavitski , Klaus Attenkofer , C. Petrovic

Two-dimensional (2D) Transition Metal Dichalcogenide semiconductor (TMDs) nanocircuits are deterministically engineered over large-scale substrates. The original approach combines large-area physical growth of 2D TMDs layer with high…

Mesoscale and Nanoscale Physics · Physics 2022-09-23 Maria Caterina Giordano , Giorgio Zambito , Matteo Gardella , Francesco Buatier de Mongeot

Transition metal dichalcogenides (TMDs) are quasi-two-dimensional layered compounds exhibiting strongly competing charge-density wave (CDW) and superconducting (SC) order parameters (OPs). The weak van der Waals interlayer bonding between…

Superconductivity · Physics 2015-05-26 Richard A. Klemm

Twisted multilayer transition metal dichalcogenides (TMDs) are a promising platform for realizing topological exciton phases. Here we propose that twisted TMD heterotrilayers WX$_2$/MX$_2$/WX$_2$ with layer symmetry represents a realistic…

Mesoscale and Nanoscale Physics · Physics 2025-04-15 Ze-Hong Guo , Tao Yan , Jin-Zhu Zhao , Yuan-Jun Jin , Qizhong Zhu

The transition metal dichalcogenides (TMDCs) with a 1T' structural phase are predicted to be two-dimensional topological insulators at zero temperature. Although the quantized edge conductance of 1T'-WTe$_2$ has been confirmed to survive up…

Mesoscale and Nanoscale Physics · Physics 2025-09-24 Wang Chen , Mengli Hu , Junyu Zong , Xuedong Xie , Wei Ren , Qinghao Meng , Fan Yu , Qichao Tian , Shaoen Jin , Xiaodong Qiu , Kaili Wang , Can Wang , Junwei Liu , Fang-Sen Li , Li Wang , Yi Zhang

Localized electronic states formed inside the band gap of a semiconductor due to crystal defects can be detrimental to the material's optoelectronic properties. Semiconductors with lower tendency to form defect induced deep gap states are…

Two dimensional (2D) topological insulators (TIs) and topological superconductors (TSCs) have been intensively studied for recent years due to its great potential for dissipationless electron transportation and fault-tolerant quantum…

Materials Science · Physics 2020-07-28 Chenxiao Zhao , Jinfeng Jia
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