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Van der Waals (vdW) Josephson junctions can possibly accelerate the development of advanced superconducting device that utilizes the unique properties of two-dimensional (2D) transition metal dichalcogenide (TMD) superconductors such as…

超导电性 · 物理学 2022-11-17 Chuanwen Zhao , Xin Yi , Qiao Chen , Chengyu Yan , Shun Wang

Electronic charge rearrangement between components of a heterostructure is the fundamental principle to reach the electronic ground state. It is acknowledged that the density of states distribution of the components governs the amount of…

Van der Waals hosts intercalated with transition metal (TM) ions exhibit a range of magnetic properties strongly influenced by the structural order of the intercalants. However, predictive computational models for the intercalant ordering…

Interfacial charge separation and recombination at heterojunctions of monolayer transition metal dichalcogenides (TMDCs) are of interest to two dimensional optoelectronic technologies. These processes can involve large changes in parallel…

材料科学 · 物理学 2017-08-02 Haiming Zhu , Jue Wang , Zizhou Gong , Young Duck Kim , Martin Gustafsson , James Hone , Xiaoyang Zhu

Van der Waals (vdW) heterobilayers formed by two-dimensional (2D) transition metal dichalcogenides (TMDCs) created a promising platform for various electronic and optical properties. ab initio band results indicate that the band offset of…

材料科学 · 物理学 2020-09-04 Yuanyuan Wang , Fengping Li , Wei Wei , Baibiao Huang , Ying Dai

Recently, van der Waals (vdW) magnetic heterostructures have received increasing research attention in spintronics. However, the lack of room-temperature magnetic order of vdW material has largely impedes its development in practical…

材料科学 · 物理学 2023-03-08 Xinlu Li , Meng Zhu , Yaoyuan Wang , Fanxing Zheng , Jianting Dong , Ye Zhou , Long You , Jia Zhang

The problem of screening the Coulomb interaction between charge carriers in type II heterostructures based on transition metal dichalcogenides is Analytically solved. At a sufficiently high density of charge carriers, the density dependence…

介观与纳米尺度物理 · 物理学 2022-05-11 Pavel V. Ratnikov

Application of transition metal dichalcogenides (TMDC) in photonic, optoelectronic or valleytronic devices requires the growth of continuous monolayers, heterostructures and alloys of different materials in a single process. We present a…

Exploring the electron tunneling mechanisms in diverse materials systems constitutes a versatile strategy for tailoring the properties of optoelectronic devices. In this domain, bipolar vertical tunneling junctions composed of van der Waals…

Ultrafast charge transfer processes provide a facile way to create interlayer excitons in directly contacted transition metal dichalcogenide (TMD) layers. More sophisticated heterostructures composed of TMD/hBN/TMD enable new ways to…

介观与纳米尺度物理 · 物理学 2023-01-12 Yoseob Yoon , Zuocheng Zhang , Ruishi Qi , Andrew Y. Joe , Renee Sailus , Kenji Watanabe , Takashi Taniguchi , Sefaattin Tongay , Feng Wang

The interaction between off-resonant laser pulses and excitons in monolayer transition metal dichalcogenides is attracting increasing interest as a route for the valley-selective coherent control of the exciton properties. Here, we extend…

Van der Waals heterostructures have recently emerged as a new class of materials, where quantum coupling between stacked atomically thin two-dimensional (2D) layers, including graphene, hexagonal-boron nitride, and transition metal…

介观与纳米尺度物理 · 物理学 2014-08-26 Xiaoping Hong , Jonghwan Kim , Su-Fei Shi , Yu Zhang , Chenhao Jin , Yinghui Sun , Sefaattin Tongay , Junqiao Wu , Yanfeng Zhang , Feng Wang

We investigate excitons in stacked transition metal dichalcogenide (TMDC) layers under perpendicularly applied electric field, herein MoSe$_2$/WSe$_2$ van der Waals heterostructures. Band structures are obtained with density functional…

介观与纳米尺度物理 · 物理学 2018-09-19 A. Chaves , J. G. Azadani , V. Ongun Özçelik , R. Grassi , T. Low

In recent years, layered transition-metal dichalcogenides (TMDs) have attracted considerable attention because of their rich physics; for example, these materials exhibit superconductivity, charge density waves, and the valley Hall effect.…

Topological superconductors (TSCs) are unconventional superconductors with bulk superconducting gap and in-gap Majorana states on the boundary that may be used as topological qubits for quantum computation. Despite their importance in both…

Taking into account the temperature gradients in solar cells, it is shown that their efficiency can be increased beyond the Shockley-Queisser limit (J. Appl. Phys. 32 (1961) 510). The driving force for this gain is the temperature gradient…

材料科学 · 物理学 2015-06-24 Stefan Kettemann , Jean-Francois Guillemoles

The crystallographic and magnetic properties of the cleavable 4d3 transition metal compound a-MoCl3 are reported, with a focus on the behavior above room temperature. Crystals were grown by chemical vapor transport and characterized using…

We investigate the impact of optically induced F\"orster coupling in van der Waals heterostructures consisting of graphene and a monolayer transition metal dichalcogenide (TMD). In particular, we predict the corresponding dephasing rates…

介观与纳米尺度物理 · 物理学 2019-03-04 Malte Selig , Ermin Malic , Kwang Jun Ahn , Norbert Koch , Andreas Knorr

Moir\'e materials are artificial crystals formed at van der Waals heterojunctions that have emerged as a highly tunable platform to realize much of the rich quantum physics of electrons in atomic scale solids, also providing opportunities…

强关联电子 · 物理学 2024-01-24 Pawel Potasz , Nicolás Morales-Durán , Nai Chao Hu , Allan H. MacDonald

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…

介观与纳米尺度物理 · 物理学 2020-06-04 Thorsten Deilmann , Michael Rohlfing , Ursula Wurstbauer