Magnetoconductance due to weak localization beyond the diffusion approximation: The high-field limit

1994 ◽  
Vol 92 (8) ◽  
pp. 711-714 ◽  
Author(s):  
M.I. Dyakonov
Keyword(s):  
Diffusion Approximation ◽  
High Field ◽  
Weak Localization ◽  
Field Limit

Magnons in spin glasses: The high-field limit

1992 ◽  
Vol 46 (1) ◽  
pp. 223-230 ◽  
Author(s):  
I. Avgin ◽  
D. L. Huber ◽  
W. Y. Ching
Keyword(s):  
Spin Glasses ◽  
High Field ◽  
Field Limit

MAGNETO-OPTICAL ROTATION IN VERY HIGH FIELDS

1960 ◽  
Vol 38 (7) ◽  
pp. 941-944 ◽  
Author(s):  
Richard Stevenson
Keyword(s):  
Magnetic Field ◽  
High Field ◽  
Optical Rotation ◽  
Field Limit ◽  
Electron Theory ◽  
Important Data ◽  
Kerr Rotation ◽  
High Fields ◽  
The Magnetic Field ◽  
Very High

Magneto-optical rotation by transmission through or reflection from solids is examined by the classical free electron theory, with the view of taking such a measurement using fields in the megagauss range. In general the rotation is a markedly non-linear function of the magnetic field, and in some cases can change in sign as the field increases. For very low fields the rotation varies directly with B, but in the high field limit the rotation varies inversely with the field. For substances in which the intercollision time of the electron is small, measurements of the Kerr rotation (i.e. by reflection) will give the electron mobility as a function of the magnetic field, and thus will give important data which can be used in conjunction with high field magnetoresistance experiments.

Evidence of Two-Dimensional Weak Localization in Polycrystalline SnO2 Films by High Field Magnetoconductance Study

2010 ◽  
Vol 159 (1-2) ◽  
pp. 212-215 ◽  
Author(s):  
T. A. Dauzhenka ◽  
V. K. Ksenevich ◽  
I. A. Bashmakov ◽  
J. Galibert
Keyword(s):  
High Field ◽  
Weak Localization ◽  
Two Dimensional

scholarly journals HIGH-FIELD LIMIT OF THE VLASOV–POISSON–FOKKER–PLANCK SYSTEM: A COMPARISON OF DIFFERENT PERTURBATION METHODS

2001 ◽  
Vol 11 (08) ◽  
pp. 1457-1468 ◽  
Author(s):  
LUIS L. BONILLA ◽  
JUAN S. SOLER
Keyword(s):  
High Field ◽  
Three Dimensions ◽  
Field Limit ◽  
One Dimensional ◽  
System A ◽  
Reduced Equations ◽  
Hilbert Expansion ◽  
The One ◽  
Different Order ◽  
Fokker Planck

A reduced drift-diffusion (Smoluchowski–Poisson) equation is found for the electric charge in the high-field limit of the Vlasov–Poisson–Fokker–Planck system, both in one and three dimensions. The corresponding electric field satisfies a Burgers equation. Three methods are compared in the one-dimensional case: Hilbert expansion, Chapman–Enskog procedure and closure of the hierarchy of equations for the moments of the probability density. Of these methods, only the Chapman–Enskog method is able to systematically yield reduced equations containing terms of different order.

HIGH-FIELD LIMIT FROM A KINETIC EQUATION TO MULTIDIMENSIONAL SCALAR CONSERVATION LAWS

2007 ◽  
Vol 04 (01) ◽  
pp. 123-145 ◽  
Author(s):  
F. BERTHELIN ◽  
N. J. MAUSER ◽  
F. POUPAUD
Keyword(s):  
Kinetic Equation ◽  
Conservation Laws ◽  
High Field ◽  
Distribution Functions ◽  
Scalar Conservation Laws ◽  
Field Limit ◽  
Flux Function ◽  
Transport Operator ◽  
Scalar Conservation

We study the relaxation of kinetic BGK models involving a high-field term within the transport operator. They lead us to multidimensional scalar conservation laws with a flux-function which is perturbed with respect to classical relaxation. The proof of the relaxation limit makes modified Maxwellians to appear. We consider "pseudo distribution functions" which can take negative values and we introduce appropriate admissible states. This is a first step towards adapting this analysis to quantum kinetic BGK models.

HIGH FIELD MAGNETOCONDUCTIVITY OF IODINE DOPED HELICAL POLYACETYLENE

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3113-3116
Author(s):  
D.-S. SUH ◽  
T. J. KIM ◽  
A. N. ALESHIN ◽  
Y. W. PARK ◽  
G. PIAO ◽  
...  
Keyword(s):  
High Field ◽  
Three Dimensional ◽  
Weak Localization ◽  
Zero Field ◽  
Polymer Fiber ◽  
Resistivity Ratio ◽  
Partial Alignment ◽  
The Difference ◽  
The Magnetic Field ◽  
Linear Field

The effect of interfibrillar interaction on the charge transport of doped polyacetylene is investigated by studying the high field magnetoconductivity of iodine doped helical polyacetylene. The zero-field resistivity ratio, ρ r = ρ(1.2 K )/ρ(300 K ), is comparable to that of stretch-oriented high-density polyacetylene, which indicates the partial alignment of chains inside a polymer fiber. At low magnetic fields, the small negative component of magnetoconductivity was observed and its magnitude increases as the ρ r value increases. In the high field region, the magnetoconductivity is positive and it clearly shows the linear dependence on the magnetic field up to H = 30 T. The linear field dependence of magnetoconductivity is different from what is expected in the three-dimensional weak localization picture. For the same ρ r value samples, the magnitude of negative magnetoconductivity of S-polyacetylene is much bigger than that of R-polyacetylene, which could be attributed to the difference in the degree of helicity determining the strength of interfibrillar interaction.

Sign in / Sign up

Export Citation Format

Share Document