381 citations · 2.1k across the 26 of their papers we have counts for
26 papers
Tuning 2D hyperbolic plasmons in black phosphorus
Edo van Veen, Andrei Nemilentsau, Anshuman Kumar +4
Black phosphorus presents a very anisotropic crystal structure, making it a potential candidate for hyperbolic plasmonics, characterized by a permittivity tensor where one of the p…
Strain-induced bound states in transition-metal dichalcogenide bubbles
L. Chirolli, E. Prada, F. Guinea +2
We theoretically study the formation of single-particle bound states confined by strain at the center of bubbles in monolayers of transition-metal dichalcogenides (TMDs). Bubbles u…
Plasmon Spectrum of Single Layer Antimonene
Guus Slotman, Alexander Rudenko, Edo van Veen +3
The collective excitation spectrum of two-dimensional (2D) antimonene is calculated beyond the low energy continuum approximation. The dynamical polarizability is computed using a…
Black phosphorus: A new bandgap tuning knob
Rafael Roldán, Andres Castellanos-Gomez
Modern electronics rely on devices whose functionality can be adjusted by the end-user with an external 'knob'. A new tuning knob to modify the band gap of black phosphorus has bee…
Theory of 2D crystals: graphene and beyond
Rafael Roldán, Luca Chirolli, Elsa Prada +3
This tutorial review presents an overview of the basic theoretical aspects of two-dimensional (2D) crystals. We revise essential aspects of graphene and the new families of semicon…
Enhanced Spin-Flip Scattering by Surface Roughness in WS and MoS Armchair Nanoribbons
Shoeib Babaee Touski, Rafael Roldán, Mahdi Pourfath +1
The band structures of single-layer MoS and WS present a coupling between spin and valley degrees of freedom that suppresses spin-flip scattering and spin dephasing. Here w…
Effect of moiré superlattice reconstruction in the electronic excitation spectrum of graphene-metal heterostructures
Antonio Politano, Guus J. Slotman, Rafael Roldán +4
We have studied the electronic excitation spectrum in periodically rippled graphene on Ru(0001) and flat, commensurate graphene on Ni(111) by means of high-resolution electron ener…
Inverse Funnel Effect of Excitons in Strained Black Phosphorus
Pablo San-Jose, Vincenzo Parente, Francisco Guinea +2
We study the effects of strain on the properties and dynamics of Wannier excitons in monolayer (phosphorene) and few-layer black phosphorus (BP), a promising two-dimensional materi…
Quantum Hall effect and semiconductor to semimetal transition in biased black phosphorus
Shengjun Yuan, Edo van Veen, Mikhail I. Katsnelson +1
We study the quantum Hall effect of 2D electron gas in black phosphorus in the presence of perpendicular electric and magnetic fields. In the absence of a bias voltage, the externa…
Theory of strain in single-layer transition metal dichalcogenides
Habib Rostami, Rafael Roldán, Emmanuele Cappelluti +2
Strain engineering has emerged as a powerful tool to modify the optical and electronic properties of two-dimensional crystals. Here we perform a systematic study of strained semico…
Screening and plasmons in pure and disordered single- and bilayer black phosphorus
Fengping Jin, Rafael Roldán, Mikhail I. Katsnelson +1
We study collective plasmon excitations and screening of disordered single- and bilayer black phosphorus beyond the low energy continuum approximation. The dynamical polarizability…
Magneto-electronic properties of multilayer black phosphorus
Yongjin Jiang, Rafael Roldán, Francisco Guinea +1
We examine the electronic properties of 2D electron gas in black phosphorus multilayers in the presence of a perpendicular magnetic field, highlighting the role of in-plane anisotr…
Strain dependent elastic modulus of graphene
Guillermo López-Polín, Miriam Jaafar, Francisco Guinea +3
Indentation experiments on graphene membranes pre-stressed by hydrostatic pressure show an increase in effective elastic modulus from 300 N/m in non pressurized membranes to 700 N/…
Novel effects of strains in graphene and other two dimensional materials
B. Amorim, A. Cortijo, F. de Juan +10
The analysis of the electronic properties of strained or lattice deformed graphene combines ideas from classical condensed matter physics, soft matter, and geometrical aspects of q…
Reply to 'Comment on "Thermodynamics of quantum crystalline membranes"'
B. Amorim, R. Roldán, E. Cappelluti +3
In this note, we reply to the comment made by E.I.Kats and V.V.Lebedev [arXiv:1407.4298] on our recent work "Thermodynamics of quantum crystalline membranes" [Phys. Rev. B 89, 2243…
Effect of Point Defects on the Optical and Transport Properties of MoS2 and WS2
S. Yuan, R. Roldán, M. I. Katsnelson +1
Imperfections in the crystal structure, such as point defects, can strongly modify the optical and transport properties of materials. Here, we study the effect of point defects on…
Thermodynamics of quantum crystalline membranes
B. Amorim, R. Roldán, E. Cappelluti +3
We investigate the thermodynamic properties and the lattice stability of two-dimensional crystalline membranes, such as graphene and related compounds, in the low temperature quant…
Screening and Collective Modes in Disordered Graphene Antidot Lattices
Shengjun Yuan, Fengping Jin, Rafael Roldán +2
The excitation spectrum and the collective modes of graphene antidot lattices (GALs) are studied in the context of a -band tight-binding model. The dynamical polarizability and…
Electronic Properties of Disordered Graphene Antidot Lattices
Shengjun Yuan, Rafael Roldán, Antti-Pekka Jauho +1
Regular nanoscale perforations in graphene (graphene antidot lattices, GAL) are known to lead to a gap in the energy spectrum, thereby paving a possible way towards many applicatio…
Polarization of graphene in a strong magnetic field beyond the Dirac cone approximation
Shengjun Yuan, Rafael Roldán, Mikhail I. Katsnelson
In this paper we study the excitation spectrum of graphene in a strong magnetic field, beyond the Dirac cone approximation. The dynamical polarizability is obtained using a full $π…
Optical conductivity of disordered graphene beyond the Dirac cone approximation
Shengjun Yuan, Rafael Roldán, Hans De Raedt +1
In this paper we systemically study the optical conductivity and density of states of disorded graphene beyond the Dirac cone approximation. The optical conductivity of graphene is…
Landau Level Spectrum of ABA- and ABC-stacked Trilayer Graphene
Shengjun Yuan, Rafael Roldán, Mikhail I. Katsnelson
We study the Landau level spectrum of ABA- and ABC-stacked trilayer graphene. We derive analytic low energy expressions for the spectrum, the validity of which is confirmed by comp…
Excitation spectrum and high energy plasmons in single- and multi-layer graphene
Shengjun Yuan, Rafael Roldán, Mikhail I. Katsnelson
In this paper we study the excitation spectrum of single- and multi-layer graphene beyond the Dirac cone approximation. The dynamical polarizability of graphene is computed using a…
Suppression of anharmonicities in crystalline membranes by external strain
Rafael Roldán, Annalisa Fasolino, Kostyantyn V. Zakharchenko +1
In practice, physical membranes are exposed to a certain amount of external strain (tension or compression), due to the environment where they are placed. As a result, the behavior…