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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…

Mesoscale and Nanoscale Physics · Physics 2023-11-02 Hanlin Fang , Qiaoling Lin , Yi Zhang , Joshua Thompson , Sanshui Xiao , Zhipei Sun , Ermin Malic , Saroj Dash , Witlef Wieczorek

Charge separated interlayer excitons in transition metal dichalcogenide (TMDC) heterobilayers are being explored for moir\'e exciton lattices and exciton condensates. The presence of permanent dipole moments and the poorly screened Coulomb…

Mesoscale and Nanoscale Physics · Physics 2021-03-17 Jue Wang , Qianhui Shi , En-Min Shih , Lin Zhou , Wenjing Wu , Yusong Bai , Daniel A. Rhodes , Katayun Barmak , James Hone , Cory R. Dean , X. -Y. Zhu

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…

Interlayer excitons (IXs) possess a much longer lifetime than intralayer excitons due to the spatial separation of the electrons and holes; hence, they have been pursued to create exciton condensates for decades. The recent emergence of…

Ensembles of indirect or interlayer excitons (IXs) are intriguing systems to explore classical and quantum phases of interacting bosonic ensembles. IXs are composite bosons that feature enlarged lifetimes due to the reduced overlap of the…

Transition metal dichalcogenide heterobilayers offer attractive opportunities to realize lattices of interacting bosons with several degrees of freedom. Such heterobilayers can feature moir\'e patterns that modulate their electronic band…

Mesoscale and Nanoscale Physics · Physics 2021-08-16 Mauro Brotons-Gisbert , Hyeonjun Baek , Aidan Campbell , Kenji Watanabe , Takashi Taniguchi , Brian D. Gerardot

Based on \emph{ab initio} theoretical calculations of the optical spectra of vertical heterostructures of MoSe$_2$ (or MoS$_2$) and WSe$_2$ sheets, we reveal two spin-orbit-split Rydberg series of excitonic states below the \textsl{A}…

Mesoscale and Nanoscale Physics · Physics 2018-04-18 Roland Gillen , Janina Maultzsch

Interlayer excitons (IXs) in hetero-bilayers of transition metal dichalcogenides (TMDs) represent an exciting emergent class of long-lived dipolar composite bosons in an atomically thin, near-ideal two-dimensional (2D) system. The…

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…

Indirect excitons (IXs) in van der Waals transition-metal dichalcogenide (TMD) heterostructures are characterized by a high binding energy making them stable at room temperature and giving the opportunity for exploring fundamental phenomena…

Mesoscale and Nanoscale Physics · Physics 2018-05-24 E. V. Calman , M. M. Fogler , L. V. Butov , S. Hu , A. Mishchenko , A. K. Geim

The optical spectra of vertically stacked MoSe$_2$/WSe$_2$ heterostructures contain additional 'interlayer' excitonic peaks that are absent in the individual monolayer materials and exhibit a significant spatial charge separation in…

Mesoscale and Nanoscale Physics · Physics 2021-07-28 Roland Gillen

Novel excitonic phenomena emerging in transition metal dichalcogenide (TMDC) heterostructures belong to the most exciting topics in contemporary physics of van der Waals materials. Interlayer excitons (IXs) stand out among those due to…

Interlayer excitons (IXs), composed of electron and hole states localized in different layers, excel in bilayers composed of atomically thin van der Waals materials such as semiconducting transition metal dichalcogenides (TMDs) due to…

Mesoscale and Nanoscale Physics · Physics 2024-07-16 Mauro Brotons-Gisbert , Brian D. Gerardot , Alexander W. Holleitner , Ursula Wurstbauer

In bilayers of semiconducting transition metal dichalcogenides, the twist angle between layers can be used to introduce a highly regular periodic potential modulation on a length scale that is large compared to the unit cell. In such…

Materials Science · Physics 2022-04-27 N. Götting , F. Lohof , C. Gies

An emerging class of semiconductor heterostructures involves stacking discrete monolayers such as the transition metal dichalcogenides (TMDs) to form van der Waals heterostructures. In these structures, it is possible to create interlayer…

Moir\'e patterns of transition metal dichalcogenide (TMD) heterobilayers have proven to be an ideal platform to host unusual correlated electronic phases, emerging magnetism, and correlated exciton physics. While the existence of novel…

Strongly enhanced electron-electron interaction in semiconducting moir\'e superlattices formed by transition metal dichalcogenides (TMDCs) heterobilayers has led to a plethora of intriguing fermionic correlated states. Meanwhile, interlayer…

Long-lived interlayer excitons with distinct spin-valley physics in van der Waals heterostructures based on transition metal dichalcogenides make them promising for information processing in next-generation devices. While the emission…

Mesoscale and Nanoscale Physics · Physics 2021-10-18 Alberto Ciarrocchi , Dmitrii Unuchek , Ahmet Avsar , Kenji Watanabe , Takashi Taniguchi , Andras Kis

Interlayer excitons, or bound electron-hole pairs whose constituent quasiparticles are located in distinct stacked semiconducting layers, are being intensively studied in heterobilayers of two dimensional semiconductors. They owe their…

The predicted formation of moire superlattices leading to confined excitonic states in heterostructures formed by stacking two lattice mismatched transition metal dichalcogenide (TMD) monolayers was recently experimentally confirmed. Such…

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