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We discuss the effect of the dielectric environment (insulators and metal gates) on electronic transport in two-dimensional (2D) transition metal dichalcogenides (TMD) monolayers. We employ well-known ab initio methods to calculate the…

Mesoscale and Nanoscale Physics · Physics 2022-08-24 Sanjay Gopalan , Maarten L. Van de Put , Gautam Gaddemane , Massimo V. Fischetti

Monolayer transition metal dichalcogenides (TMDs) possess superior optical properties, including the valley degree of freedom that can be accessed through the excitation light of certain helicity. While WS2 and WSe2 are known for their…

Two-dimensional (2D) transition metal nitrides (TMNs) are new members in the 2D materials family with a wide range of applications. Particularly, highly crystalline and large area thin films of TMNs are potentially promising for…

Materials Science · Physics 2019-10-07 Jun Cao , Tianshu Li , Hongze Gao , Yuxuan Lin , Xingzhi Wang , Haozhe Wang , Tomás Palacios , Xi Ling

Quantum Hall effect (QHE) is a macroscopic manifestation of quantized states which only occurs in confined two-dimensional electron gas (2DEG) systems. Experimentally, QHE is hosted in high mobility 2DEG with large external magnetic field…

Materials Science · Physics 2018-10-17 Gang Qiu , Yixiu Wang , Yifan Nie , Yongping Zheng , Kyeongjae Cho , Wenzhuo Wu , Peide D. Ye

2D transition metal dichalcogenides (TMDs) have attracted a lot of attention recently for energy-efficient tunneling-field-effect transistor (TFET) applications due to their excellent gate control resulting from their atomically thin…

Mesoscale and Nanoscale Physics · Physics 2016-08-22 Tarek A. Ameen , Hesameddin Ilatikhameneh , Gerhard Klimeck , Rajib Rahman

Ion transport through nanopores permeates through many areas of science and technology, from cell behavior to sensing and separation to catalysis and batteries. Two-dimensional materials, such as graphene, molybdenum disulfide (MoS$_2$),…

Mesoscale and Nanoscale Physics · Physics 2019-07-19 Subin Sahu , Michael Zwolak

Whereas electron-phonon scattering typically relaxes the electron's momentum in metals, a perpetual exchange of momentum between phonons and electrons conserves total momentum and can lead to a coupled electron-phonon liquid with unique…

Most materials in available macroscopic quantities are polycrystalline. Graphene, a recently discovered two-dimensional form of carbon with strong potential for replacing silicon in future electronics, is no exception. There is growing…

Mesoscale and Nanoscale Physics · Physics 2010-09-28 Oleg V. Yazyev , Steven G. Louie

Suppressing of an ordered state that competes with superconductivity is one route to enhance superconducting transition temperatures. Whereas the effect of suppressing magnetic states is still not fully understood, materials featuring…

Two-dimensional materials, including transition metal dichalcogenides, are attractive for a variety of applications in electronics as well as photonics and have recently been envisioned as an appealing platform for phonon polaritonics.…

Through a combined theoretical and experimental effort, we uncover a yet unidentified mechanism that strengthens considerably electron-phonon coupling in materials where electron accumulation leads to population of multiple valleys. Taking…

Mesoscale and Nanoscale Physics · Physics 2019-08-14 Evgeniy Ponomarev , Thibault Sohier , Marco Gibertini , Helmuth Berger , Nicola Marzari , Nicolas Ubrig , Alberto F. Morpurgo

Two-dimensional layered materials, such as transition metal dichalcogenides (TMDCs), are promising materials for future electronics owing to their unique electronic properties. With the presence of a band gap, atomically thin gate defined…

Mesoscale and Nanoscale Physics · Physics 2015-10-28 Xiang-Xiang Song , Di Liu , Vahid Mosallanejad , Jie You , Tian-Yi Han , Dian-Teng Chen , Hai-Ou Li , Gang Cao , Ming Xiao , Guang-Can Guo , Guo-Ping Guo

The interplay between charge transfer and electronic disorder in transition-metal dichalcogenide multilayers gives rise to superconductive coupling driven by proximity enhancement, tunneling and superconducting fluctuations, of a yet…

Intercalation offers a promising way to alter the physical properties of two-dimensional (2D) layered materials. Here we investigate the electronic and vibrational properties of 2D layered MoSe$_2$ intercalated with atomic manganese at…

Materials Science · Physics 2020-09-28 Shunda Chen , Virginia L. Johnson , Davide Donadio , Kristie J. Koski

The effect of quantum confinement in the optical absorption spectra of atomically thin {\alpha}-In2Se3 crystals is studied, observing a huge thickness-dependent shift in the optical band gap of exfoliated {\alpha}-In2Se3 flakes. The band…

Mesoscale and Nanoscale Physics · Physics 2016-10-19 Jorge Quereda , Robert Biele , Gabino Rubio-Bollinger , Nicolás Agraït , Roberto D'Agosta , Andres Castellanos-Gomez

Low-symmetry 2D materials---such as ReS$_2$ and ReSe$_2$ monolayers, black phosphorus monolayers, group-IV monochalcogenide monolayers, borophene, among others---have more complex atomistic structures than the honeycomb lattices of…

Mesoscale and Nanoscale Physics · Physics 2020-10-28 Salvador Barraza-Lopez , Fengnian Xia , Wenjuan Zhu , Han Wang

Graphene-like two-dimensional (2D) materials, not only are interesting for their exotic electronic structure and fundamental electronic transport or optical properties but also, hold promises for device miniaturization down to atomic…

Artificial confinement of electrons by tailoring the layer thickness has turned out to be a powerful tool to harness control over competing phases in nano-layers of complex oxides. We investigate the effect of dimensionality on transport…

Strongly Correlated Electrons · Physics 2021-03-11 Subhadip Jana , Shwetha G. Bhat , B. C. Behera , L. Patra , P. S. Anil Kumar , B. R. K. Nanda , D. Samal

Over the last decade, progress in wide bandgap, III-V materials systems based on gallium nitride (GaN) has been a major driver in the realization of high power and high frequency electronic devices. Since the highly conductive,…

Exciton transport in 2D semiconductors holds promise for room-temperature, ultra-compact optoelectronic devices, but it is limited by short propagation distances. Hybridization of excitons with cavity photons to form exciton-polaritons can…

Mesoscale and Nanoscale Physics · Physics 2025-07-08 Jamie M. Fitzgerald , Roberto Rosati , Ermin Malic
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