搜索结果: 1-15 共查到“理学 impurity”相关记录25条 . 查询时间(0.078 秒)
Impurity and quaternions in nonrelativistic scattering from a quantum memory
Impurity and quaternions nonrelativistic scattering quantum memory
2015/10/16
Models of quantum computing rely on transformations of the states of a quantum memory. We study mathematical aspects of a model proposed by Wu in which the memory state is changed via the scattering o...
Binding of a 3He Impurity to a Screw Dislocation in Solid 4He
Based on simulation the probability density solid atom the nucleus
2014/12/19
Using first-principles simulations for the probability density of finding a 3He atom in the vicinity of the screw dislocation in solid 4He, we determine the binding energy to the dislocation nucleus E...
Effect of charged impurity correlation on transport in monolayer and bilayer graphene
charged impurity correlation transport monolayer bilayer graphene
2012/2/27
We study both monolayer and bilayer graphene transport properties taking into account the presence of correlations in the spatial distribution of charged impurities. In particular we find that the exp...
Impurity-assisted Andreev reflection at a spin-active half-metal-superconductor interface
Impurity-assisted Andreev reflection spin-active half-metal-superconductor interface
2012/2/27
The Andreev reflection amplitude at a clean interface between a half-metallic ferromagnet (H) and a superconductor (S) for which the half metal's magnetization has a gradient perpendicular to the inte...
Impurity-trapped excitons and electron traps in CaF$_2$:Yb$^{2+}$ and SrF$_2$:Yb$^{2+}$ probed by transient photoluminescence enhancement
rare-earth Yb2+ CaF2 two-color spectroscopy exciton electron trap
2011/8/18
Abstract: CaF$_2$:Yb$^{2+}$ and SrF$_2$:Yb$^{2+}$ crystals have been investigated by a two-color UV + IR transient photoluminescence enhancement technique. The enhancement gives information about both...
Transient photoluminescence enhancement as a probe of the structure of impurity-trapped excitons in CaF$_2$:Yb$^{2+}$
photoluminescence enhancement impurity-trapped excitons Materials Science
2011/8/17
Abstract: We demonstrate a direct measurement of the energy levels of impurity-trapped excitons in CaF$_2$:Yb$^{2+}$. The radically different radiative decay rates of the lowest exciton state and high...
On the resonances and eigenvalues for a 1D half-crystal with localised impurity
resonances scattering periodic potential S-matrix
2011/9/6
Abstract: We consider the Schr\"odinger operator $H$ on the half-line with a periodic potential $p$ plus a compactly supported potential $q$. For generic $p$, its essential spectrum has an infinite se...
Impurity transport in temperature gradient driven turbulence
Impurity transport temperature gradient driven turbulence Plasma Physics
2011/8/2
Abstract: In the present paper the transport of impurities by TE and ITG mode driven turbulence is studied. Results obtained using a multi-fluid model are compared with quasilinear (QL) and nonlinear ...
Full orbit simulations of collisional impurity transport in spherical tokamak plasmas with strongly-sheared electric fields
sheared electric fields strongly-sheared electric fields tokamak plasmas
2011/8/31
The collisional dynamics of test impurity ions in spherical tokamak plasmas with strongly-sheared radial electric fields is investigated by means of a test
particle full orbit simulation code. The st...
Possible mechanism responsible for observed impurity outward flow under radio frequency heating
Possible mechanism radio frequency heating
2011/8/26
The effect of poloidal asymmetry of impurities on impurity transport driven by electrostatic turbulence in tokamak plasmas is analyzed. It is found that in
the presence of in-out asymmetric impurity ...
Strong coupling treatment of the polaronic system consisting of an impurity in a condensate
Other Bose-Einstein condensation phenomena
2010/11/18
The strong coupling treatment of the Fr¨ohlich-type polaronic system, based on a canonical
transformation and a standard Landau-Pekar type variational wave function, is applied to the
polaronic syst...
Spin wave calculation of the field-dependent magnetization pattern around an impurity in Heisenberg antiferromagnets
Spin wave calculation field-dependent magnetization pattern Heisenberg antiferromagnets
2010/11/18
We consider the magnetic- eld dependent spatial magnetization pattern around a general impurity embedded in a Heisenberg antiferromagnet using both an analytical and a numerical spin wave approach. Th...
A semiquantitative approach to the impurity-band-related transport properties of GaMnAs nanolayers
semiquantitative impurity-band-related
2010/11/18
We investigate the spin-polarized transport of GaMnAs nanolayers in which a ferromagnetic order
exists below a certain transition temperature. Our calculation for the self-averaged resistivity takes ...
Striking Zn impurity effect on the Fe-based superconductor BaFe1.87Co0.13As2
Striking Zn impurity effect superconductor BaFe1.87Co0.13As2
2010/11/17
Nonmagnetic impurity effect was studied on the n-type Fe-based superconductor BaFe1.87Co0.13As2 (Tc = 25 K) by a successful Zn substitution for Fe up to 7 at.%. Magnetic susceptibility, electrical res...
Effects of Impurity on the Ground-State Transitions of a
Quantum Dot in Strong Magnetic Field
impurity states quantum dots
2007/8/15
2001Vol.35No.6pp.735-739DOI:
Effects of Impurity on the Ground-State Transitions of a
Quantum Dot in Strong Magnetic Field
K.S. CHAN,1 H.P. HO,1 E.Y.B. PUN2 and W.Y. RUAN3
...