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pro vyhledávání: '"Cartoixà X"'
A fully predictive Kinetic Collective Model using first principles phonon spectra and relaxation times is presented. Thermal conductivity values obtained for Si, Ge, C (diamond) and GaAs in a wide range of sizes and temperatures have good agreement w
Externí odkaz:
http://arxiv.org/abs/1606.01149
Several hitherto unexplained features of thermal conductivity in group IV materials, such as the change in the slope as a function of sample size for pure vs. alloyed samples and the fast decay in thermal conductivity for low impurity concentration,
Externí odkaz:
http://arxiv.org/abs/1506.01522
Publikováno v:
Physical Status Solidi C 7(2010) 11-12
The direct solution of the many-particle Schr\"odinger equation is computationally inaccessible for more than very few electrons. In order to surpass this limitation, one of the authors [X. Oriols, Phys. Rev. Lett. 2007, 98 (066803)] has recently pro
Externí odkaz:
http://arxiv.org/abs/1408.4346
Publikováno v:
J Phys Condens Matter. 2013 Aug 14;25(32):325601
Following Ref. [Oriols X 2007 Phys. Rev. Lett., 98 066803], an algorithm to deal with the exchange interaction in non-separable quantum systems is presented. The algorithm can be applied to fermions or bosons and, by construction, it exactly ensures
Externí odkaz:
http://arxiv.org/abs/1408.0388
Publikováno v:
Nanotechnology 18, 025201 (2007).
We report on a new computational model to efficiently simulate carbon nanotubebased field effect transistors (CNT-FET). In the model, a central region is formed by a semiconducting nanotube that acts as the conducting channel, surrounded by a thin ox
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610882
We have developed a method to systematically compute the form of Rashba- and Dresselhaus-like contributions to the spin Hamiltonian of heterostructures to an arbitrary order in the wavevector k. This is achieved by using the double group representati
Externí odkaz:
http://arxiv.org/abs/cond-mat/0511538
Publikováno v:
Phys. Rev. B, v. 71 (4), 045313 (2005)
We apply the D'yakonov-Perel' (DP) formalism to [111]-grown zincblende quantum wells (QWs) to compute the spin lifetimes of electrons in the two-dimensional electron gas. We account for both bulk and structural inversion asymmetry (Rashba) effects. W
Externí odkaz:
http://arxiv.org/abs/cond-mat/0402237
We have developed an 8-band Effective Mass Approximation model that describes the zero field spin splitting in the band structure of zincblende heterostructures due to bulk inversion asymmetry (BIA). We have verified that our finite difference Hamilt
Externí odkaz:
http://arxiv.org/abs/cond-mat/0212394
The injection of spin polarized electrons from ferromagnetic metals (Fe and Co) into gallium nitride (GaN) via scanning tunneling microscopy (STM) is demonstrated. Electrons from STM tips are injected into the semiconductor. Net circular polarization
Externí odkaz:
http://arxiv.org/abs/cond-mat/0010058
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