2 research outputs found
Spin-orbit interaction in a dual gated InAs/GaSb quantum well
The spin-orbit interaction is investigated in a dual gated InAs/GaSb quantum well. Using an electric field, the quantum well can be tuned between a single-carrier regime with exclusively electrons as carriers and a two-carrier regime where electrons and holes coexist. The spin-orbit interaction in both regimes manifests itself as a beating in the Shubnikov-de Haas oscillations. In the single-carrier regime the linear Dresselhaus strength is characterized by ÎČ=28.5 meV Ă
and the Rashba coefficient α is tuned from 75 to 53 meV Ă
by changing the electric field. In the two-carrier regime a quenching of the spin splitting is observed and attributed to a crossing of spin bands.QRD/Kouwenhoven LabQuTechQRD/Wimmer La
Measurement of charged particle multiplicities and densities in pp collisions at sâ=7 TeV in the forward region
Charged particle multiplicities are studied in
protonâproton collisions in the forward region at a centre-ofmass
energy of
â
s = 7 TeV with data collected by the LHCb
detector. The forward spectrometer allows access to a kinematic
range of 2.0 < η < 4.8 in pseudorapidity, momenta
greater than 2 GeV/c and transverse momenta greater than
0.2 GeV/c. The measurements are performed using events
with at least one charged particle in the kinematic acceptance.
The results are presented as functions of pseudorapidity and
transverse momentum and are compared to predictions from
several Monte Carlo event generators