155 citations · 463 across the 24 of their papers we have counts for
15 papers · 1 filter
High Strain Engineering of a Suspended WSSe Monolayer Membrane by Indentation and Measured by Tip-enhanced Photoluminescence
Anis Chiout, Agnès Tempez, Thomas Carlier +9
Straintronics involves the manipulation and regulation of the electronic characteristics of 2D materials through the use of macro- and nano-scale strain engineering. In this study,…
Probing local emission properties in InGaN/GaN quantum wells by scanning tunneling luminescence microscopy
Mylène Sauty, Natalia Alyabyeva, Cheyenne Lynsky +7
Scanning tunneling electroluminescence microscopy is performed on a 3-nm-thick InGaN/GaN quantum well with x = 0.23 such that the main light emission occurs in the green. The techn…
Anomalous ambipolar transport in depleted GaAs nanowires
H. Hijazi, D. Paget, A C. H. Rowe +7
We have used a polarized microluminescence technique to investigate photocarrier charge and spin transport in n-type depleted GaAs nanowires ( cm doping le…
Spin/Valley pumping of resident electrons in WSe2 and WS2 monolayers
Cedric Robert, Sangjun Park, Fabian Cadiz +14
Monolayers of transition metal dichalcogenides are ideal materials to control both spin and valley degrees of freedom either electrically or optically. Nevertheless, optical excita…
Mechanical stress dependence of the Fermi level pinning on an oxidized silicon surface
H. Li, L. Martinelli, F. Cadiz +4
A combination of micro-Raman spectroscopy and micro-XPS (X-ray photo-electron spectroscopy) mapping on statically deflected p-type silicon cantilevers is used to study the mechanic…
Exciton diffusion in WSe2 monolayers embedded in a van der Waals heterostructure
F. Cadiz, C. Robert, E. Courtade +9
We have combined spatially-resolved steady-state micro-photoluminescence (PL) with time-resolved photoluminescence (TRPL) to investigate the exciton diffusion in a WSe monol…
Giant, anomalous piezo-impedance of silicon-on-insulator
Heng Li, Christopher Tao-Kuan Lew, Brett Johnson +3
A giant, anomalous piezo-response of fully-depleted silicon-on-insulator (FD-SOI) devices under mechanical stress is demonstrated using impedance spectroscopy. This piezo-response…
Luminescence imaging of photoelectron spin precession during drift in p-type GaAs
V. Notot, D. Paget, A. C. H. Rowe +3
Using a microfabricated, p-type GaAs Hall bar, is it shown that the combined application of co-planar electric and magnetic fields enables the observation at 50 K of spatial oscill…
Ambipolar spin-spin coupling in p-GaAs
F. Cadiz, D. Paget, A. C. H. Rowe +1
A novel spin-spin coupling mechanism that occurs during the transport of spin-polarized minority electrons in semiconductors is described. Unlike the Coulomb spin drag, this coupli…
Anomalous temperature dependence of photoelectron charge and spin mobilities in p+-GaAs
F. Cadiz, D. Paget, A. C. H. Rowe +2
The effect of an electric field on the spatial charge and spin profiles of photoelectrons in p+-GaAs is studied as a function of lattice and electron temperature. The charge and sp…
VLS-HVPE growth of ultra-long and defect-free GaAs nanowires investigated by ab initio simulation coupled to near-field microscopy
Yamina Andre, Kaddour Lekhal, Philip Hoggan +13
High aspect ratio, rod-like and single crystal phase GaAs nanowires (NWs) were grown by gold catalyst-assisted hydride vapor phase epitaxy (HVPE). High resolution transmission elec…
Effect of the Pauli principle on photoelectron spin transport in GaAs
F. Cadiz, D. Paget, A. C. H. Rowe +3
In p+ GaAs thin films, the effect of photoelectron degeneracy on spin transport is investigated theoretically and experimentally by imaging the spin polarization profile as a funct…
Imaging ambipolar diffusion of photocarriers in GaAs thin films
Daniel Paget, Fabian Cadiz, Alistair Rowe +3
Images of the steady-state luminescence of passivated GaAs self-standing films under excitation by a tightly-focussed laser are analyzed as a function of light excitation power. Wh…
On giant piezoresistance effects in silicon nanowires and microwires
J. S. Milne, S. Arscott, C. Renner +1
The giant piezoresistance (PZR) previously reported in silicon nanowires is experimentally investigated in a large number of surface depleted silicon nano- and micro-structures. Th…
Photoassisted tunneling from free-standing GaAs thin films into metallic surfaces
D. Vu, S. Arscott, E. Peytavit +7
The tunnel photocurrent between a gold surface and a free-standing semiconducting thin film excited from the rear by above bandgap light has been measured as a function of applied…