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Twisted van der Waals heterostructures and the corresponding superlattices, moire superlattices, are remarkable new material platforms, in which electron interactions and excited-state properties can be engineered. Particularly, the band…

介观与纳米尺度物理 · 物理学 2019-11-13 Xiaobo Lu , Xiaoqin Li , Li Yang

We study a capacitor made of three monolayers of transition metal dichalcogenide (TMD) separated by hexagonal Boron Nitride (hBN). We assume that the structure is symmetric with respect to the central layer plane. The symmetry includes the…

介观与纳米尺度物理 · 物理学 2019-04-10 M. Sammon , B. I. Shklovskii

Trapped interlayer excitons (IXs) in MoSe2-WSe2 heterobilayers have generated interest for use as single quantum emitter arrays and as an opportunity to study moir\'e physics in transition metal dichalcogenide (TMD) heterostructures. IXs…

Layered van der Waals transition metal dichalcogenides (TMDCs), generally composed of three atomic X-M-X planes in each layer (M = transition metal, X = chalcogen), provide versatile platforms for exploring diverse quantum phenomena. In…

介观与纳米尺度物理 · 物理学 2024-05-28 Ya-Xin Zhao , Zi-Yi Han , Ya-Ning Ren , Ruo-Han Zhang , Xiao-Feng Zhou , Yu Zhang , Lin He

Heterostructures made from 2D transition-metal dichalcogenides are known as ideal platforms to explore excitonic phenomena ranging from correlated moir\'e excitons to degenerate interlayer exciton ensembles. So far, it is assumed that the…

Long lifetimes of spatially indirect excitons (IXs), also known as interlayer excitons, make possible long-range IX propagation. Van der Waals heterostructures composed of atomically thin layers of transition-metal dichalcogenides (TMDs)…

介观与纳米尺度物理 · 物理学 2022-06-07 L. H. Fowler-Gerace , Zhiwen Zhou , E. A. Szwed , L. V. Butov

Van der Waals (vdW) heterostructures have attracted great interest because of their rich material combinations.The discovery of two-dimensional magnets has provided a new platform for magnetic vdW heterointerfaces; however, research on…

Transition metal dichalcogenide (TMD) heterobilayers provide a versatile platform to explore unique excitonic physics via properties of the constituent TMDs and external stimuli. Interlayer excitons (IXs) can form in TMD heterobilayers as…

介观与纳米尺度物理 · 物理学 2023-11-02 Hanlin Fang , Qiaoling Lin , Yi Zhang , Joshua Thompson , Sanshui Xiao , Zhipei Sun , Ermin Malic , Saroj Dash , Witlef Wieczorek

Two-dimensional (2D) materials are a new type of materials under intense study because of their interesting physical properties and wide range of potential applications from nanoelectronics to sensing and photonics. Monolayers of…

Vertically stacked van der Waals heterostructures are a lucrative platform for exploring the rich electronic and optoelectronic phenomena in two-dimensional materials. Their performance will be strongly affected by impurities and defects at…

Throughout the years, strongly correlated coherent states of excitons have been the subject of intense theoretical and experimental studies. This topic has recently boomed due to new emerging quantum materials such as van der Waals (vdW)…

介观与纳米尺度物理 · 物理学 2021-12-30 Igor V. Bondarev , Oleg L. Berman , Roman Ya. Kezerashvili , Yurii E. Lozovik

Interlayer excitons confined in bilayer heterostructures of transition metal dichalcogenides (TMDs) offer a promising route to implement two-dimensional dipolar superfluids. Here, we study the experimental conditions necessary for the…

量子气体 · 物理学 2021-02-03 Camille Lagoin , Francois Dubin

Heterostructures of atomically thin van der Waals bonded monolayers have opened a unique platform to engineer Coulomb correlations, shaping excitonic, Mott insulating, or superconducting phases. In transition metal dichalcogenide…

In order to fully exploit the potential of transition metal dichalcogenide monolayers (TMD-MLs), the well-controlled creation of atomically sharp lateral heterojunctions within these materials is highly desirable. A promising approach to…

介观与纳米尺度物理 · 物理学 2017-10-11 Sven Borghardt , Jhih-Sian Tu , Florian Winkler , Jürgen Schubert , Willi Zander , Kristján Lesson , Beata E. Kardynał

Controlling excitons and their transport in two-dimensional (2D) transition metal dichalcogenides (TMDs) heterostructures is central to advancing photonics and electronics on-chip integration. We investigate the controlled generation and…

Monolayers of semiconducting transition metal dichalcogenides exhibit intriguing fundamental physics of strongly coupled spin and valley degrees of freedom for charge carriers. While the possibility of exploiting these properties for…

Bilayer van der Waals (vdW) heterostructures such as MoS2/WS2 and MoSe2/WSe2 have attracted much attention recently, particularly because of their type II band alignments and the formation of interlayer exciton as the lowest-energy…

介观与纳米尺度物理 · 物理学 2017-12-14 Shiyuan Gao , Li Yang , Catalin D. Spataru

Because of their strong excitonic photoluminescence (PL) and electroluminescence (EL), together with an excellent electronic tunability, transition metal dichalcogenide (TMD) semiconductors are promising candidates for novel optoelectronic…

介观与纳米尺度物理 · 物理学 2019-03-08 Lukas Dobusch , Simone Schuler , Vasili Perebeinos , Thomas Mueller

Vertical heterostructures (HS) of transition metal dichalcogenides (TMDs) host interlayer excitons (ILX), with electrons and holes residing in different layers. With respect to their intralayer counterparts, ILX feature much longer…

Van der Waals heterostructures based on TMDC semiconducting materials have emerged as promising materials due to their spin-valley properties efficiently contrived by the stacking-twist angle. The twist angle drastically alters the…