255 citations · 2.8k across the 61 of their papers we have counts for
41 papers · 1 filter
Excitons in moiré superlattices with disordered electrons
Junghwan Kim, Dinh Van Tuan, Hanan Dery
Moiré superlattices in transition metal dichalcogenides (TMDs) heterobilayers exhibit various correlated insulating states driven by long-range Coulomb interactions, and these stat…
Excitons in fractionally-filled moiré superlattices
Junghwan Kim, Hanan Dery, Dinh Van Tuan
Long-range Coulomb forces give rise to correlated insulating states when charge particles populate a moiré superlattice at certain fractional filling factors. Such behavior is char…
Landau-level composition of bound exciton states in magnetic field
Dinh Van Tuan, Hanan Dery
We present a theory that studies the state composition of a bound exciton in magnetic field. Using a basis set made of products of free electron and hole wavefunctions in Landau ga…
Energy shifts and broadening of excitonic resonances in electrostatically-doped semiconductors
Hanan Dery, Cedric Robert, Scott A. Crooker +2
Tuning the density of resident electrons or holes in semiconductors provides crucial insight into the composition of excitonic complexes that are observed as absorption or photolum…
Component exchange theory of trions
Dinh Van Tuan, Hanan Dery
Treating the trion problem as an effective two-body system with exciton and electron components, we identify component exchange as the reason leading to trion formation. This mecha…
Effects of dynamical dielectric screening on the excitonic spectrum of monolayer semiconductors
Dinh Van Tuan, Hanan Dery
We present a new method to solve the dynamical Bethe-Salpeter Equation numerically. The method allows one to investigate the effects of dynamical dielectric screening on the spectr…
Excitons in periodic potentials
Dinh Van Tuan, Hanan Dery
The energy band structure of excitons is studied in periodic potentials produced by the short-range interaction between the exciton and electrons of Wigner or Moiré lattices. Treat…
Turning many-body problems to few-body ones in photoexcited semiconductors using the stochastic variational method in momentum space, SVM-k
Dinh Van Tuan, Hanan Dery
We develop an efficient computational technique to calculate composite excitonic states in photoexcited semiconductors through the stochastic variational method (SVM). Many-body in…
Hexcitons and oxcitons in monolayer WSe
Dinh Van Tuan, Su-Fei Shi, Xiaodong Xu +2
In the archetypal monolayer semiconductor WSe, the distinct ordering of spin-polarized valleys (low-energy pockets) in the conduction band allows for studies of not only simple…
Composite excitonic states in doped semiconductors
Dinh Van Tuan, Hanan Dery
We present a theoretical model of composite excitonic states in doped semiconductors. Many-body interactions between a photoexcited electron-hole pair and the electron gas are inte…
Relaxation and darkening of excitonic complexes in electrostatically-doped monolayer semiconductors: Roles of exciton-electron and trion-electron interactions
Min Yang, Lei Ren, Cedric Robert +5
We present photoluminescence measurements in monolayer WSe, which point to the importance of the interaction between charged particles and excitonic complexes. The theoretical…
Measurement of Conduction and Valence Bands g-factors in a Transition Metal Dichalcogenide Monolayer
Cedric Robert, Hanan Dery, Lei Ren +9
The electron valley and spin degree of freedom in monolayer transition-metal dichalcogenides can be manipulated in optical and transport measurements performed in magnetic fields.…
Intervalley plasmons in crystals
Dinh Van Tuan, Benedikt Scharf, Igor Žutić +1
Collective charge excitations in solids have been the subject of intense research ever since the pioneering works of Bohm and Pines in the 1950s. Most of these studies focused on l…
Virtual trions in the photoluminescence of monolayer transition-metal dichalcogenides
Dinh Van Tuan, Aaron M. Jones, Min Yang +2
Photoluminescence experiments from monolayer transition-metal dichalcogenides often show that the binding energy of trions is conspicuously similar to the energy of optical phonons…
Proximitized Materials
Igor Zutic, Alex Matos-Abiague, Benedikt Scharf +2
Advances in scaling down heterostructures and having an improved interface quality together with atomically-thin two-dimensional materials suggest a novel approach to systematicall…
Dynamical screening in monolayer transition-metal dichalcogenides and its manifestations in the exciton spectrum
Benedikt Scharf, Dinh Van Tuan, Igor Žutić +1
Monolayer transition-metal dichalcogenides (ML-TMDs) offer exciting opportunities to test the manifestations of many-body interactions through changes in the charge density. Tuning…
The Coulomb interaction in monolayer transition-metal dichalcogenides
Dinh Van Tuan, Min Yang, Hanan Dery
Recently, the celebrated Keldysh potential has been widely used to describe the Coulomb interaction of few-body complexes in monolayer transition-metal dichalcogenides. Using this…
Marrying excitons and plasmons in monolayer transition-metal dichalcogenides
Dinh Van Tuan, Benedikt Scharf, Igor Žutić +1
Just as photons are the quanta of light, plasmons are the quanta of orchestrated charge-density oscillations in conducting media. Plasmon phenomena in normal metals, superconductor…
Suppressing spin relaxation in silicon
Oleg Chalaev, Yang Song, Hanan Dery
Uniaxial compressive strain along the [001] direction strongly suppresses the spin relaxation in silicon. When the strain level is large enough so that electrons are redistributed…
Probing Many-Body Interactions in Monolayer Transition-Metal Dichalcogenides
Dinh Van Tuan, Benedikt Scharf, Zefang Wang +4
Many-body interactions in monolayer transition-metal dichalcogenides are strongly affected by their unique band structure. We study these interactions by measuring the energy shift…
Theory of intervalley Coulomb interactions in monolayer transition-metal dichalcogenides
Hanan Dery
Exciton optical transitions in transition-metal dichalcogenides offer unique opportunities to study rich many-body physics. Recent experiments in monolayer WSe and WS have…
Polarization analysis of excitons in monolayer and bilayer transition-metal dichalcogenides
Hanan Dery, Yang Song
The polarization analysis of optical transitions in monolayer and bilayer transition-metal dichalcogenides provides invaluable information on the spin and valley (pseudospin) degre…
Donor-driven spin relaxation in multi-valley semiconductors
Yang Song, Oleg Chalaev, Hanan Dery
We present a theory for spin relaxation of electrons due to scattering off the central-cell potential of impurities in silicon. Taking into account the multivalley nature of the co…
Exchange-driven magnetoresistance in silicon facilitated by electrical spin injection
Yuichiro Ando, Lan Qing, Yang Song +6
We use electrical spin injection to probe exchange interactions in phosphorus doped silicon (Si:P). The detection is enabled by a magnetoresistance effect that demonstrates the eff…