The augmented space method and configuration averaging in disordered systems

2008 ◽  
pp. 248-272 ◽  
Author(s):  
Abhijit Mookerjee
Keyword(s):  
Disordered Systems ◽  
Augmented Space ◽  
Space Method

scholarly journals Augmented-space recursion for partially disordered systems

2001 ◽  
Vol 13 (45) ◽  
pp. 10149-10157 ◽  
Author(s):  
Atisdipankar Chakrabarti ◽  
Abhijit Mookerjee
Keyword(s):  
Disordered Systems ◽  
Augmented Space

AN ADAPTATION OF THE AUGMENTED SPACE APPROACH TO RANDOM MAGNETIC ALLOYS: AN APPLICATION TO Ni1−xFex

1990 ◽  
Vol 04 (04) ◽  
pp. 605-618 ◽  
Author(s):  
ABHIJIT MOOKERJEE ◽  
ARUN K. MISHRA
Keyword(s):  
Tight Binding ◽  
Coulomb Repulsion ◽  
Spin Fluctuations ◽  
Ferromagnetic Alloy ◽  
Binding Model ◽  
Anderson Hamiltonian ◽  
Augmented Space ◽  
Random Magnetic Alloys ◽  
Space Method ◽  
Space Approach

An application of CPA and cluster CPA to Ni rich Ni 1−x Fe x ferromagnetic alloy on the basis of multiband tight binding model is discussed. The augmented space method of Mookerjee1 has been extended to include the case where the potential is generated self-consistently. The tight binding Anderson Hamiltonian incorporates a term to account for the opposite Coulomb repulsion of electrons. The resulting Anderson-Hubbard Hamiltonian is used to consider the spin fluctuations and moment formation, on alloying, of the transition metal Ni with Fe.

Some comments on the augmented space method

1978 ◽  
Vol 11 (24) ◽  
pp. L949-L952 ◽  
Author(s):  
S Y Wu ◽  
Y C Chen ◽  
J J Sinai
Keyword(s):  
Augmented Space ◽  
Space Method

RECURSION METHOD IN AUGMENTED SPACE

1992 ◽  
Vol 06 (20) ◽  
pp. 3295-3308 ◽  
Author(s):  
ABHIJIT DATTA ◽  
ABHIJIT MOOKERJEE
Keyword(s):  
Density Of States ◽  
Binary Alloy ◽  
New Method ◽  
Recursion Method ◽  
Simple Cubic ◽  
Recursion Scheme ◽  
Augmented Space ◽  
Space Formalism ◽  
Cubic Structure ◽  
Space Method

A new method for configuration averaging in random binary alloy problem is proposed which combines the augmented space method with Haydock’s recursion scheme. The basis members of the augmented space are represented by a series of binary words (the multi-spin coding technique). Haydock’s recursion scheme is employed to obtain the resolvent of the Hamiltonian in the augmented space formalism. The configuration averaged DOS is obtained from the resolvent. The procedure is illustrated by applying it to a simple s-state model of random binary alloy on a simple cubic structure. We have also applied the method to calculate the density of states for CuAg alloys using both the LCAO and TB-LMTO methods.

On the stochastic transport in disordered systems

1988 ◽  
Vol 49 (10) ◽  
pp. 1731-1736 ◽  
Author(s):  
M.V. Feigel'man ◽  
V.M. Vinokur
Keyword(s):  
Disordered Systems ◽  
Stochastic Transport

TEMPERATURE DEPENDENCE OF THE HOPPING HALL MOBILITY IN SPATIALLY AND ENERGETICALLY DISORDERED SYSTEMS

1981 ◽  
Vol 42 (C4) ◽  
pp. C4-99-C4-102
Author(s):  
M. Grünewald ◽  
H. Müller ◽  
P. Thomas ◽  
D. Würtz
Keyword(s):  
Temperature Dependence ◽  
Hall Mobility ◽  
Disordered Systems
Sign in / Sign up

Export Citation Format

Share Document