411 citations · 1.4k across the 19 of their papers we have counts for
19 papers
Dissociation of one-dimensional excitons by static electric field
Adriana García, Alexander López, Jorge Quereda +1
The quantum states of an electron-hole pair in one-dimensional semiconductors under a static electric field are theoretically analyzed using a two-band model with on-site Coulomb i…
Quantum valley pseudospin controlled by strain
Maurício F. C. Martins Quintela, Miguel Sá, Alejandro J. Uría-Álvarez +5
Valleytronics, as an alternative to traditional electronics or spintronics, is based on the encoding of quantum information in pseudospin valley quantum numbers, rather than in cha…
Locally Phase-Engineered MoTe for Near-Infrared Photodetectors
Jan Hidding, Cédric A. Cordero-Silis, Daniel Vaquero +3
Transition metal dichalcogenides (TMDs) are ideal systems for two-dimensional (2D) optoelectronic applications, owing to their strong light-matter interaction and various band gap…
Polarization-tuneable excitonic spectral features in the optoelectronic response of atomically thin ReS2
Daniel Vaquero, Olga Arroyo-Gascón, Juan Salvador-Sánchez +7
The low crystal symmetry of rhenium disulphide (ReS2) leads to the emergence of dichroic optical and optoelectronic response, absent in other layered transition metal dichalcogenid…
Fast response photogating in monolayer MoS2 phototransistors
Daniel Vaquero, Vito Clericò, Juan Salvador-Sánchez +6
Two-dimensional transition metal dichalcogenide (TMD) phototransistors have been object of intensive research during the last years due to their potential for photodetection. Photo…
The role of device asymmetries and Schottky barriers on the helicity-dependent photoresponse of 2D phototransistors
Jorge Quereda, Jan Hidding, Talieh S. Ghiasi +3
Circular photocurrents (CPC), namely circular photogalvanic (CPGE) and photon drag effects, have recently been reported both in monolayer and multilayer transition metal dichalcoge…
Excitons, trions and Rydberg states in monolayer MoS2 revealed by low temperature photocurrent spectroscopy
Daniel Vaquero, Vito Clericò, Juan Salvador-Sánchez +6
We investigate excitonic transitions in a h-BN encapsulated monolayer phototransistor by photocurrent spectroscopy at cryogenic temperature (T = 5 K). The spectra…
Semiconductor channel mediated photodoping in h-BN encapsulated monolayer MoSe2 phototransistors
Jorge Quereda, Talieh S. Ghiasi, Caspar H. van der Wal +1
In optically excited two-dimensional phototransistors, charge transport is often affected by photodoping effects. Recently, it was shown that such effects are especially strong and…
Bilayer h-BN Barriers for Tunneling Contacts in Fully-Encapsulated Monolayer Field-Effect Transistors
Talieh S. Ghiasi, Jorge Quereda, Bart J. van Wees
The performance of electronic and spintronic devices based on two-dimensional semiconductors (2D SC) is largely dependent on the quality and resistance of the metal/SC electrical c…
Symmetry regimes for circular photocurrents in monolayer MoSe2
Jorge Quereda, Talieh S. Ghiasi, Jhih-Shih You +3
In monolayer transition metal dichalcogenides helicity-dependent charge and spin photocurrents can emerge, even without applying any electrical bias, due to circular photogalvanic…
Observation of bright and dark exciton transitions in monolayer MoSe2 by photocurrent spectroscopy
Jorge Quereda, Talieh S. Ghiasi, Feitze A. van Zwol +2
We investigate the excitonic transitions in single- and few-layer MoSe2 phototransistors by photocurrent spectroscopy. The measured spectral profiles show a well-defined peak at th…
Strain engineering of Schottky barriers in single- and few-layer MoS2 vertical devices
Jorge Quereda, Juan José Palacios, Nicolás Agräit +2
We study the effect of local strain in the electronic transport properties of vertical metal-atomically thin MoS2-metal structures. We use a conductive atomic force microscope tip…
Strong quantum confinement effect in the optical properties of ultrathin α-In2Se3
Jorge Quereda, Robert Biele, Gabino Rubio-Bollinger +3
The effect of quantum confinement in the optical absorption spectra of atomically thin α-In2Se3 crystals is studied, observing a huge thickness-dependent shift in the optical band…
Enhanced superconductivity in atomically thin TaS2
Efrén Navarro-Moratalla, Joshua O. Island, Samuel Mañas-Valero +11
The ability to exfoliate layered materials down to the single layer limit has opened the opportunity to understand how a gradual reduction in dimensionality affects the properties…
Enhanced Visibility of MoS2, MoSe2, WSe2 and Black Phosphorus: Making Optical Identification of 2D Semiconductors Easier
Gabino Rubio-Bollinger, Ruben Guerrero, David Perez de Lara +5
We explore the use of Si3N4/Si substrates as a substitute of the standard SiO2/Si substrates employed nowadays to fabricate nanodevices based on 2D materials. We systematically stu…
Strong modulation of optical properties in black phosphorus through strain-engineered rippling
Jorge Quereda, Pablo San-José, Vincenzo Parente +7
Controlling the bandgap through local-strain engineering is an exciting avenue for tailoring optoelectronic materials. Two-dimensional crystals are particularly suited for this pur…
Spatially resolved optical absorption spectroscopy of single- and few-layer MoS2 by hyperspectral imaging
Andres Castellanos-Gomez, Jorge Quereda, Herko P. van der Meulen +2
The possibility of spatially resolving the optical properties of atomically thin materials is especially appealing as they can be modulated at the micro- and nanoscale by reducing…
Single-layer MoS2 roughness and sliding friction quenching by interaction with atomically flat substrates
Jorge Quereda, Andres Castellanos-Gomez, Nicolás Agraït +1
We experimentally study the surface roughness and the lateral friction force in single-layer MoS2 crystals deposited on different substrates: SiO2, mica and hexagonal boron nitride…
Fast and reliable identification of atomically thin layers of TaSe2 crystals
Andres Castellanos-Gomez, Efrén Navarro-Moratalla, Guillermo Mokry +7
Deposition of clean and defect-free atomically thin two-dimensional crystalline flakes on surfaces by mechanical exfoliation of layered bulk materials has proven to be a powerful t…