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Memristive Control of Plasmon-Mediated Nonlinear Photoluminescence in Au Nanowires

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Indium selenide: an insight into electronic band structure and surface excitations

Davide Campi

We have investigated the electronic response of single crystals of indium selenide by means of angle-resolved photoemission spectroscopy, electron energy loss spectroscopy and density functional theory. The loss spectrum of indium selenide shows the direct ...

Nature Publishing Group2017

Valley polarization by spin injection in a light-emitting van der Waals heterojunction

Andras Kis, Oriol López Sánchez, Dmitry Ovchinnikov, Adrien Victor Allain, Shikhar Misra

The band structure of transition metal dichalcogenides (TMDCs) with valence band edges at different locations in the momentum space could be harnessed to build devices that operate relying on the valley degree of freedom. To realize such valleytronic devic ...

American Chemical Society2016

Vacuum ultraviolet excitation luminescence spectroscopy of few-layered MoS2

Andras Kis, Daria Krasnozhon, Wei Cao

We report on vacuum ultraviolet (VUV) excited photoluminescence (PL) spectra emitted from a chemical vapor deposited MoS2 few-layered film. The excitation spectrum was recorded by monitoring intensities of PL spectra at similar to 1.9 eV. A strong wide exc ...

Institute of Physics2016

Absolute deformation potentials of two-dimensional materials

Alfredo Pasquarello, Julia Anna Wiktor

We present ab initio calculations of uniaxial absolute deformation potentials of the valence and the conduction bands in monolayer MoS2, MoSe2, WS2, WSe2, h-BN, and phosphorene. Calculations are performed using both semilocal and hybrid functionals. The ab ...

Amer Physical Soc2016

Ultrafast Optical Control of the Electronic Properties of ZrTe5

Marco Grioni, Arnaud Magrez, Helmuth Berger, Philippe Bugnon, Alberto Crepaldi

We report on the temperature dependence of the ZrTe5 electronic properties, studied at equilibrium and out of equilibrium, by means of time and angle resolved photoelectron spectroscopy. Our results unveil the dependence of the electronic band structure ac ...

Amer Physical Soc2015

Electronic Structure of Graphene and Topological Insulators

Jens Christian Johannsen

The study of the electronic band structure of solids is a central task in materials science. Indeed, knowing a material's band structure is key to an understanding of its macroscopic electronic properties. In recent years, a new class of materials has emer ...

EPFL2015

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We investigate the effect of asymmetric configurations on the heterogate germanium electron-hole bilayer tunnel field-effect transistor (HG-EHBTFET) and assess the improvement that they provide in terms of boosting the typically very low ON current levels ...

Institute of Electrical and Electronics Engineers2015

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Recently, bowtie-shaped apertures have received significant attention due to their extraordinary ability to generate dramatic field enhancement and light confinement in nanometer scale. In this article, we investigate both experimentally and theoretically ...

Brill Academic Publishers2015

Bi2Te3-xSex series studied by resistivity and thermopower

László Forró, Ana Akrap

We study the detailed temperature and composition dependence of the resistivity, rho(T), and thermopower, S(T), for a series of layered bismuth chalcogenides Bi2Te3-xSex, and report the stoichiometry dependence of the optical band gap. In the resistivity o ...

Epl Association, European Physical Society2014

Review and prospects of magnonic crystals and devices with reprogrammable band structure

Dirk Grundler

Research efforts addressing spin waves (magnons) in micro- and nanostructured ferromagnetic materials have increased tremendously in recent years. Corresponding experimental and theoretical work in magnonics faces significant challenges in that spin-wave d ...

Iop Publishing Ltd2014