scholarly journals Theory for dynamical short-range order and Fermi surface volume in strongly correlated systems

1996 ◽  
Vol 54 (6) ◽  
pp. 4336-4340 ◽  
Author(s):  
J. Schmalian ◽  
M. Langer ◽  
S. Grabowski ◽  
K. H. Bennemann
Keyword(s):  
Fermi Surface ◽  
Short Range ◽  
Short Range Order ◽  
Strongly Correlated Systems ◽  
Range Order ◽  
Strongly Correlated ◽  
Correlated Systems

ATOMIC SHORT RANGE ORDER AND SPIN DENSITY WAVE PROPAGATION IN CuMn

1993 ◽  
Vol 07 (01n03) ◽  
pp. 663-668
Author(s):  
J.W. CABLE ◽  
Y. TSUNODA
Keyword(s):  
Fermi Surface ◽  
Spin Density ◽  
Short Range ◽  
Short Range Order ◽  
Density Wave ◽  
Spin Density Wave ◽  
Range Order ◽  
Single Domain ◽  
Heat Treated Sample ◽  
High Degree

Neutron scattering studies of the atomic short range order (ASRO) and spin density waves (SDW) were carried out for a Cu-35% Mn sample with an unusually high degree of ASRO that develops mostly in a single tetragonal domain. The SDW peaks show a distinctly non-cubic distribution that is readily correlated with the ASRO and which corresponds to the propagation of SDW only in the c plane of the tetragonally based ASRO. The high degree of ASRO and single domain character of this carefully heat-treated sample produces an unusually stable SDW with a higher transition temperature and a larger correlation length than is observed for quenched alloys of the same Mn content. Since SDW stability depends on structural features in the conduction electron susceptibility and on flat, parallel sections of the Fermi surface, these observations suggest that the degree of ASRO and/or the presence of single domain ASRO influences the sharpness of the relevant Fermi surface features in these alloys.

scholarly journals Destruction of the Fermi surface due to pseudogap fluctuations in strongly correlated systems

JETP Letters ◽  
2005 ◽  
Vol 82 (4) ◽  
pp. 198-203 ◽  
Author(s):  
E. Z. Kuchinskii ◽  
I. A. Nekrasov ◽  
M. V. Sadovskii
Keyword(s):  
Fermi Surface ◽  
Strongly Correlated Systems ◽  
Strongly Correlated ◽  
Correlated Systems
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