698 citations · 2.7k across the 20 of their papers we have counts for
20 papers
Imaging superconducting weak spots through vortex-assisted THz near-field photovoltage
Sergio J. Salvía-Fernández, Ekaterina Khestanova, Zoe Velluire-Pellat +9
Nanoscale inhomogeneities are a defining feature of many superconducting materials, yet their local electromagnetic response has remained difficult to access experimentally. This i…
Terahertz photocurrent probe of quantum geometry and interactions in magic-angle twisted bilayer graphene
Roshan Krishna Kumar, Geng Li, Riccardo Bertini +24
Moiré materials represent strongly interacting electron systems bridging topological and correlated physics. Despite significant advances, decoding wavefunction properties underlyi…
Electrostatic control of nonlinear photonic-crystal polaritons in a monolayer semiconductor
Ekaterina Khestanova, Vanik Shahnazaryan, Valerii K. Kozin +6
Integration of 2D semiconductors with photonic crystal slabs provides an attractive approach to achieve strong light--matter coupling and exciton-polariton formation in a planar ch…
Robustness of momentum-indirect interlayer excitons in MoS2/WSe2 heterostructure against charge carrier doping
Ekaterina Khestanova, Tatyana Ivanova, Roland Gillen +13
Monolayer transition-metal dichalcogenide (TMD) semiconductors exhibit strong excitonic effects and hold promise for optical and optoelectronic applications. Yet, electron doping o…
Revealing intrinsic superconductivity of the Nb/BiSbTeSe interface
Andrei Kudriashov, Ian Babich, Razmik A. Hovhannisyan +7
Typically, topological superconductivity is reachable via proximity effect by a direct deposition of superconductor (S) on top of a topological insulator (TI) surface. Here we obse…
Dynamical Control of Interlayer Excitons and Trions in WSe/MoWSe Heterobilayer via Tunable Near-Field Cavity
Yeonjeong Koo, Hyeongwoo Lee, Tatiana Ivanova +5
Emerging photo-induced excitonic processes in transition metal dichalcogenide (TMD) heterobilayers, e.g., coupling, dephasing, and energy transfer of intra- and inter-layer exciton…
Experimental observation of topological exciton-polaritons in transition metal dichalcogenide monolayers
Mengyao Li, Ivan Sinev, Fedor Benimetskiy +11
The rise of quantum science and technologies motivates photonics research to seek new platforms with strong light-matter interactions to facilitate quantum behaviors at moderate li…
Large magnetoelectric coupling in multiferroic oxide heterostructures assembled via epitaxial lift-off
David Pesquera, Ekaterina Khestanova, Massimo Ghidini +12
The strain dependent functional properties of epitaxial transition metal oxide films can be significantly modified via substrate selection. However, large lattice mismatches preclu…
Spin-valley dynamics in alloy-based transition metal dichalcogenide heterobilayers
V. Kravtsov, A. D. Liubomirov, R. V. Cherbunin +11
Van der Waals heterobilayers based on 2D transition metal dichalcogenides have been recently shown to support robust and long-lived valley polarization for potential valleytronic a…
Disjoining pressure oscillations causing height discretization in graphene nanobubbles
Timur Aslyamov, Ekaterina Khestanova, Maria Korneva +3
Recent experiments and computer simulations observe various geometrical formations of nanobubbles in van der Waals heterostructures. Among the well studied dome and tent geometries…
Enhanced superconductivity in few-layer TaS due to healing by oxygenation
J. Bekaert, E. Khestanova, D. G. Hopkinson +15
When approaching the atomically thin limit, defects and disorder play an increasingly important role in the properties of two-dimensional materials. Superconductivity is generally…
Nonlinear polaritons in monolayer semiconductor coupled to optical bound states in the continuum
V. Kravtsov, E. Khestanova, F. A. Benimetskiy +16
Optical bound states in the continuum (BICs) provide a way to engineer very narrow resonances in photonic crystals. The extended interaction time in such systems is particularly pr…
Strained bubbles in van der Waals heterostructures as local emitters of photoluminescence with adjustable wavelength
Anastasia Tyurnina, Denis Bandurin, Ekaterina Khestanova +6
The possibility to tailor photoluminescence (PL) of monolayer transition metal dichalcogenides (TMDCs) using external factors such as strain, doping and external environment is of…
Unusual suppression of the superconducting energy gap and critical temperature in atomically thin NbSe2
Ekaterina Khestanova, John Birkbeck, Mengjian Zhu +12
It is well known that superconductivity in thin films is generally suppressed with decreasing thickness. This suppression is normally governed by either disorder-induced localizati…
High-temperature quantum oscillations caused by recurring Bloch states in graphene superlattices
R. Krishna Kumar, X. Chen, G. H. Auton +13
Cyclotron motion of charge carriers in metals and semiconductors leads to Landau quantization and magneto-oscillatory behavior in their properties. Cryogenic temperatures are usual…
Graphene bubbles on a substrate : Universal shape and van der Waals pressure
E. Khestanova, F. Guinea, L. Fumagalli +2
Trapped substances between a 2D crystal, such as graphene, and an atomically flat substrate, for example, hexagonal boron nitride, give rise to the formation of bubbles. We show th…
Magnetotransport in single layer graphene in a large parallel magnetic field
F. Chiappini, S. Wiedmann, M. Titov +7
Graphene on hexagonal boron-nitride (h-BN) is an atomically flat conducting system that is ideally suited for probing the effect of Zeeman splitting on electron transport. We demon…
Superconductivity in potassium-doped metallic polymorphs of MoS2
Renyan Zhang, I-Ling Tsai, James Chapman +3
Superconducting layered transition metal dichalcogenides (TMDs) stand out among other superconductors due to the tunable nature of the superconducting transition, coexistence with…
Negative local resistance caused by viscous electron backflow in graphene
D. A. Bandurin, I. Torre, R. Krishna Kumar +10
Graphene hosts a unique electron system in which electron-phonon scattering is extremely weak but electron-electron collisions are sufficiently frequent to provide local equilibriu…
Quality heterostructures from two dimensional crystals unstable in air by their assembly in inert atmosphere
Y. Cao, A. Mishchenko, G. L. Yu +16
Many layered materials can be cleaved down to individual atomic planes, similar to graphene, but only a small minority of them are stable under ambient conditions. The rest reacts…