نتایج جستجو برای: electron relaxation time

تعداد نتایج: 2206802  

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم 1393

in this thesis, structural, electronical, and optical properties of inverse pervskite(ca3pbo) in cubic phase have been investigated.the calculation have been done based on density functional theory and according to generalized gradiant approximate (gga) as correlating potential. in order to calculate the configurations, implementing in the wien2k code have been used from 2013 version. first of ...

2013
Mariateresa Scarongella Andrey Laktionov Ursula Rothlisberger Natalie Banerji

The development of conjugated materials bearing electron-rich and electron-poor units along their backbone introduces new possibilities to control functionality for organic electronic applications through charge transfer character in ground and excited states. A thorough understanding of intramolecular dipoles and their evolution during excited state relaxation is necessary in order to fully ex...

1997
C. Dalitz E H. de Groot

An explicit solution of the stationary one dimensional half-space boundary value problem for the linear Boltzmann equation is presented in the presence of an arbitrarily high constant external field. The collision kernel is assumed to be separable, which is also known as “relaxation time approximation”; the relaxation time may depend on the electron velocity. Our method consists in a transforma...

2003
M. G. Vavilov L. I. Glazman A. I. Larkin

We consider the effect of the Ruderman-Kittel-Kasuya-Yosida~RKKY! interaction between magnetic impurities on the electron relaxation rates in a normal metal. The interplay between the RKKY interaction and the Kondo effect may result in a nonmonotonic temperature dependence of the electron momentum relaxation rate, which determines the Drude conductivity. The electron phase relaxation rate, whic...

1999
Sanghyuk Lee Baldev R. Patyal Jack H. Freed

Nuclear modulation in electron-spin-echo spectroscopy is conventionally studied by onedimensional electron-spin-echo envelope modulation ( lD-ESEEM) . Two-dimensional Fourier transform electron-spin resonance (2D-FTESR) studies of nuclear modulation have the promise of enhancing the spectral resolution and clarifying the key details of the relaxation processes. We present a 2D-FTESR study on si...

1996
A. Y. Potekhin D. G. Yakovlev

We derive practical expressions for a rapid and accurate evaluation of electric and thermal conductivities and thermopower of degenerate relativistic electrons along quantizing magnetic elds in outer neutron star crusts. We consider the electron Coulomb scattering on ions in liquid matter, as well as on high-temperature phonons or charged impurities in solid matter. We propose also a reasonable...

Journal: :The Journal of chemical physics 2009
Graham B Griffin Oli T Ehrler Aster Kammrath Ryan M Young Ori Cheshnovsky Daniel M Neumark

Using femtosecond time-resolved photoelectron imaging, electron-hole pairs are created in size-selected Hg(n)(-) anion clusters (n=9-20), and the subsequent decay dynamics are measured. These clusters eject electrons via Auger decay on time scales of 100-600 fs. There is an abrupt increase in the Auger decay time for clusters larger than Hg(12)(-), coinciding with the onset of the transition fr...

1995
A. Y. Potekhin D. G. Yakovlev

We derive practical expressions for a rapid and accurate evaluation of electric and thermal conductivities and thermopower of degenerate relativistic electrons along quantizing magnetic fields in outer neutron star crusts. We consider the electron Coulomb scattering on ions in liquid matter, as well as on high-temperature phonons or charged impurities in solid matter. We propose also a reasonab...

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