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We present here the minimal tight--binding model for a single layer of transition metal dichalcogenides (TMDCs) MX$_{2}$ (M--metal, X--chalcogen) which illuminates the physics and captures band nesting, massive Dirac Fermions and Valley…

Materials Science · Physics 2023-05-05 M. Bieniek , M. Korkusiński , L. Szulakowska , P. Potasz , I. Ozfidan , P. Hawrylak

Transition-metal dichalcogenides (TMDs) are valuable as solid lubricants because of their layered structure, which allows for easy shearing along the basal planes. Using Density Functional Theory (DFT) we conducted a first-principles study…

The recent development in the field of 2D magnetic materials urges reliable theoretical methodology for determination of magnetic properties. Among the available methods, ab initio four-state energy mapping based on Density Functional…

Mesoscale and Nanoscale Physics · Physics 2020-08-05 Denis Sabani , Cihan Bacaksiz , Milorad Milosevic

The paper discusses a model of Van der Waals crystals in which band-gap structures do not form. An effect of strong and chaotic electron-electron repulsion, which was excluded from consideration in the traditional approach, is taken into…

Superconductivity · Physics 2007-05-23 V. N. Bogomolov

We study indirect exchange interactions between localized spins of magnetic impurities in spin-valley coupled systems described with the Kane-Mele model. Our model captures the main ingredients of the energy bands of 1H transition metal…

Mesoscale and Nanoscale Physics · Physics 2022-12-13 M. R. Losada , A. T. Costa , B. Biel , J. Fernández-Rossier

Using a first-principles Green's function approach we study magnetic properties of the magnetic binary chalcogenides Bi2Te3, Bi2Se3, and Sb2Te3. The magnetic coupling between transition-metal impurities is long-range, extends beyond a…

Twisted transition metal dichalcogenide (TMD) bilayers exhibit periodic moir\'e potentials, which can trap excitons at certain high-symmetry sites. At small twist angles, TMD lattices undergo an atomic reconstruction, altering the moir\'e…

Mesoscale and Nanoscale Physics · Physics 2024-11-26 Joakim Hagel , Samuel Brem , Ermin Malic

Recent results on the optical properties of mono- and few-layers of semiconducting transition metal dichalcogenides are reviewed. Experimental observations are presented and discussed in the frame of existing models, highlighting the limits…

Mesoscale and Nanoscale Physics · Physics 2017-09-19 M. Koperski , M. R. Molas , A. Arora , K. Nogajewski , A. O. Slobodeniuk , C. Faugeras , M. Potemski

Even if individual two-dimensional materials own various interesting and unexpected properties, the stacking of such layers leads to van der Waals solids which unite the characteristics of two dimensions with novel features originating from…

Mesoscale and Nanoscale Physics · Physics 2020-06-04 Thorsten Deilmann , Michael Rohlfing , Ursula Wurstbauer

Electronic structure of strongly correlated transition metal oxides (TMOs) is a complex phenomenon due to competing interaction among the charge, spin, orbital and lattice degrees of freedom. Often individual compounds are examined to…

Strongly Correlated Electrons · Physics 2018-10-17 Priyadarshini Parida , Ravi Kashikar , Ajit Jena , B. R. K. Nanda

Two-dimensional (2D) layered transition metal dichalcogenides (TMDs) have recently attracted tremendous interest as potential valleytronic and nano-electronic materials, in addition to being well-known as excellent lubricants in the bulk.…

Ultraflatbands that have been theoretically and experimentally detected in a bunch of van der Waals stacked materials showing some peculiar properties, for instance, highly localized electronic states and enhanced electron-electron…

Mesoscale and Nanoscale Physics · Physics 2021-01-04 Zhen Zhan , Yipei Zhang , Pengfei Lv , Hongxia Zhong , Guodong Yu , Francisco Guinea , Jose Angel Silva-Guillen , Shengjun Yuan

The realization of the stable structure of Heusler compounds and the study of different properties is an important step for their potential application in spintronics and magnetoelectronic devices. In this paper, using the plane-wave…

Two-dimensional transition metal dichalcogenides (TMDs) exist in two polymorphs, referred to as $1T$ and $1H$, depending on the coordination sphere of the transition metal atom. The broken octahedral and trigonal prismatic symmetries lead…

Mesoscale and Nanoscale Physics · Physics 2018-10-03 Diego Pasquier , Oleg V. Yazyev

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

We introduce transition metal-dichalcogenide (TMD) nanostructures as a promising platform for the realisation of structural colours. Processing of semianalytically calculated reflectance spectra of TMD nanosphere arrays shows a wide range…

Mesoscale and Nanoscale Physics · Physics 2026-04-28 Ida Juliane Bundgaard , Catarina G. Ferreira , Yonas Lebsir , Christos Tserkezis

Two-dimensional van der Waals compounds with magnetic ions on a honeycomb lattice are hosts to a variety of exotic behavior. The magnetic interactions in one such compound, MnPSe$_3$, are investigated with elastic and inelastic neutron…

Strongly Correlated Electrons · Physics 2021-01-20 S. Calder , A. V. Haglund , A. I. Kolesnikov , D. Mandrus

Transition metal diborides crystallise in the $\alpha$, $\gamma$, or $\omega$ type structure, in which pure transition metal layers alternate with pure boron layers stacked along the hexagonal [0001] axis. Here we view the prototypes as…

Materials Science · Physics 2024-05-21 Thomas Leiner , Nikola Koutná , Jozef Janovec , Martin Zelený , Paul H. Mayrhofer , David Holec

Twisted bilayer transition metal dichalcogenides have emerged as important model systems for the investigation of correlated electron physics because their interaction strength, carrier concentration, band structure, and inversion symmetry…

Strongly Correlated Electrons · Physics 2021-09-01 Jiawei Zang , Jie Wang , Jennifer Cano , Andrew J. Millis

The magnetic properties of the transition metal monoxides MnO and NiO are investigated at equilibrium and under pressure via several advanced first-principles methods coupled with Heisenberg Hamiltonian MonteCarlo. The comparative…

Strongly Correlated Electrons · Physics 2015-05-28 T. Archer , C. D. Pemmaraju , S. Sanvito , C. Franchini , J. He , A. Filippetti , P. Delugas , D. Puggioni , V. Fiorentini , R. Tiwari , P. Majumdar