Zobrazeno 1 - 10
of 38
pro vyhledávání: '"G. Gangadhar Reddy"'
Publikováno v:
Physica B: Condensed Matter. 405:1701-1705
The Hubbard model has been employed successfully to understand many aspects of correlation driven physical properties, in particular, the magnetic order in itenerant electron systems. In some systems such as Heusler alloys, manganites etc., it is kno
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::277231e96510f6b1170ddf53375dd3a2
https://doi.org/10.1016/j.physb.2009.12.071
https://doi.org/10.1016/j.physb.2009.12.071
Publikováno v:
International Journal of Modern Physics B. 22:423-434
In the presence of the electron–lattice interaction where the lattice strain is coupled to the difference in orbital occupancy, the metallic system whose Fermi level lies in an orbitally degenerate eg band undergoes a structural transition to a low
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e5d464144e59b375a141c9349747fc99
https://doi.org/10.1142/s0217979208038612
https://doi.org/10.1142/s0217979208038612
Publikováno v:
International Journal of Modern Physics B. 18:1161-1177
Motivated by the experimental studies on the temperature- and field-induced valence transitions in Yb- and Eu-based rare earth compounds, a model calculation is performed. For this purpose, the periodic Anderson model, supplemented by the Falicov–K
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0c2746dab42507ce41dd12623e9879d9
https://doi.org/10.1142/s0217979204024653
https://doi.org/10.1142/s0217979204024653
Publikováno v:
Pramana. 58:773-776
The magnetic-field-induced valence transition in rare-earth systems has been investigated using the periodic Anderson model supplemented by the Falicov-Kimball term. This model has been solved by first decoupling the Falicov-Kimball term as proposed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5401894f783d8ab9cdebc7958b6d5fce
https://doi.org/10.1007/s12043-002-0169-2
https://doi.org/10.1007/s12043-002-0169-2
Publikováno v:
Solid State Communications. 120:325-329
In rare-earth manganites the itinerant eg-electrons interact via exchange coupling with localized t2g-electrons which constitute the spin background. This fact is taken into account in the double exchange model DEM. The limit realistic to manganites
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d404cdeecc1abc8c4d9fec6edcdf80fb
https://doi.org/10.1016/s0038-1098(01)00361-1
https://doi.org/10.1016/s0038-1098(01)00361-1
Publikováno v:
International Journal of Modern Physics B. 15:2583-2594
Strongly correlated electron systems are studied with the help of periodic Anderson model (PAM). The PAM in which highly correlated nondegenerate localized states form a subsystem is considered and the focus of study is on magnetic ordering of electr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46cce45f1b558c129a92bb35df64fb16
https://doi.org/10.1142/s0217979201006434
https://doi.org/10.1142/s0217979201006434
Publikováno v:
Journal of Physics: Condensed Matter. 12:7463-7480
We introduce a new aproximation scheme for the periodic Anderson model (PAM). The modified alloy approximation represents an optimum alloy approximation for the strong coupling limit, which can be solved within the CPA-formalism. Zero-temperature and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::53487490b41de857fc369836b5beaed8
https://doi.org/10.1088/0953-8984/12/33/313
https://doi.org/10.1088/0953-8984/12/33/313
Publikováno v:
physica status solidi (b). 208:473-495
We introduce a new approach to the periodic Anderson model (PAM) that allows a detailed investigation of the magnetic properties in the Kondo as well as the intermediate valence regime. Our method is based on an exact mapping of the PAM onto an effec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32dfc4a59a9ee9ca7f1fa3765f1fe5ad
https://doi.org/10.1002/(sici)1521-3951(199808)208:2<473::aid-pssb473>3.0.co
https://doi.org/10.1002/(sici)1521-3951(199808)208:2<473::aid-pssb473>3.0.co
Publikováno v:
AIP Conference Proceedings.
The Kondo lattice model supplemented by the Jahn-Teller distortion is used in order to study the influence of structural distortion on the magnetoresistance. This model is solved for single particle Green's function using an interpolating self-energy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4f925721e944e3c69a962fd5a72ed62
https://doi.org/10.1063/1.4791419
https://doi.org/10.1063/1.4791419
Publikováno v:
AIP Conference Proceedings.
An interpolating self-energy approach to the single band Kondo lattice model is used to investigate the interplay of magnetic order and electrical conductivity in local moment systems. The model is solved for the single particle Green’s function us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad0d6626a52bc2143298656bb89c4e1b
https://doi.org/10.1063/1.4736901
https://doi.org/10.1063/1.4736901