Results 21 to 30 of about 1,261,954 (334)

Charge carrier correlation in the electron-doped t-J model [PDF]

open access: yes, 2006
We study the t-t'-t''-J model with parameters chosen to model an electron-doped high temperature superconductor. The model with one, two and four charge carriers is solved on a 32-site lattice using exact diagonalization.
P. Fulde, P. W. Leung, W. Stephan
core   +1 more source

Towards automated design of quantum cascade lasers [PDF]

open access: yes, 2005
We present an advanced technique for the design and optimization of GaAs/AlGaAs quantum cascade laser structures. It is based on the implementation of the simulated annealing algorithm with the purpose of determining a set of design parameters that ...
Aleksandra Mirčetić   +8 more
core   +1 more source

Generation of spin-polarized currents via cross-relaxation with dynamically pumped paramagnetic impurities [PDF]

open access: yes, 2014
Key to future spintronics and spin-based information processing technologies is the generation, manipulation, and detection of spin polarization in a solid state platform.
Doherty, Marcus W., Meriles, Carlos A.
core   +2 more sources

Slow cooling and efficient extraction of C-exciton hot carriers in MoS2 monolayer [PDF]

open access: yes, 2016
In emerging optoelectronic applications, such as water photolysis, exciton fission and novel photovoltaics involving low-dimensional nanomaterials, hot-carrier relaxation and extraction mechanisms play an indispensable and intriguing role in their photo ...
Bao, Q   +14 more
core   +1 more source

Direct and Simultaneous Observation of Ultrafast Electron and Hole Dynamics in Germanium [PDF]

open access: yes, 2017
Understanding excited carrier dynamics in semiconductors is crucial for the development of photovoltaics and efficient photonic devices. However, overlapping spectral features in optical/NIR pump-probe spectroscopy often render assignments of separate ...
Borja, Lauren J.   +12 more
core   +3 more sources

Ultrafast nonlinear optical response of Dirac fermions in graphene [PDF]

open access: yes, 2018
The speed of solid-state electronic devices, determined by the temporal dynamics of charge carriers, could potentially reach unprecedented petahertz frequencies through direct manipulation by optical fields, consisting in a million-fold increase from ...
Baudisch, Matthias   +10 more
core   +2 more sources

Thickness-dependent optical response and ultrafast carrier dynamics of PtSe2 films

open access: yesResults in Physics, 2022
As a novel transition metal dichalcogenide material with high carrier mobility, adjustable band gap and excellent stability, the photocarrier ultrafast dynamics of PtSe2 films with the different thickness is researched by ultrafast transient absorption ...
ZeSong Zheng   +8 more
doaj   +1 more source

HYPOCATALASEMIA: A NEW GENETIC CARRIER STATE* [PDF]

open access: yesJournal of Clinical Investigation, 1960
A clinical, biochemical and genetic study has been made of a rare hereditary disease, acatalasemia, characterized by the absence of activity of the enzyme catalase from the blood and other tissues. Clinically, about half of the acatalasemics suffer from a peculiar type of oral gangrene (Takahara's disease) in childhood.
S, TAKAHARA   +5 more
openaire   +2 more sources

Dominant role of many-body effects on the carrier distribution function of quantum dot lasers [PDF]

open access: yes, 2016
The effects of free-carrier-induced shift and broadening on the carrier distribution function are studied considering different extreme cases for carrier statistics (Fermi–Dirac and random carrier distributions) as well as quantum dot (QD) ensemble ...
Childs, David   +3 more
core   +1 more source

Superconductivity from Undressing

open access: yes, 2000
Photoemission experiments in high $T_c$ cuprates indicate that quasiparticles are heavily 'dressed' in the normal state, particularly in the low doping regime.
A. Bhattacharya   +55 more
core   +1 more source

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