Abstract:
We study the Mott transition in the Hubbard model within the dynamical mean field theory approach where the density matrix renormalization group method is used to solve its self-consistent equations. The DMRG technique solves the associated impurity problem. We obtain accurate estimates of the critical values of the metal-insulator transitions. For the Hubbard model away from the particle-hole symmetric case we focus our study on the region of strong interactions and finite doping where two solutions coexist. In this region we demonstrate the capabilities of this method by obtaining the frequency-dependent optical conductivity spectra. With this algorithm, more complex models having a larger number of degrees of freedom can be considered and finite-size effects can be minimized. © 2007 Elsevier B.V. All rights reserved.
Registro:
Documento: |
Artículo
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Título: | Metal-insulator transition in correlated systems: A new numerical approach |
Autor: | García, D.J.; Miranda, E.; Hallberg, K.; Rozenberg, M.J. |
Filiación: | Instituto de Física Gleb Wataghin, Unicamp, CEP 13083-970 Campinas, SP, Brazil Instituto Balseiro, Centro Atómico Bariloche, CNEA, 8400 San Carlos de Bariloche, Argentina Laboratoire de Physique des Solides, CNRS-UMR8502, Université de Paris-Sud, Orsay, 91405, France Departamento de Física, FCEN, Universidad de Buenos Aires, Pabellón 1, Buenos Aires (1428), Argentina
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Palabras clave: | Density matrix renormalization group; Dynamical mean field theory; Mott transition; Density matrix renormalization groups; Dynamical mean field theory; Mott transitions; Self-consistent equations; Degrees of freedom (mechanics); Matrix algebra; Mean field theory; Optical conductivity; Semiconductor doping; Spectrum analysis; Metal insulator boundaries |
Año: | 2007
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Volumen: | 398
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Número: | 2
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Página de inicio: | 407
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Página de fin: | 411
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DOI: |
http://dx.doi.org/10.1016/j.physb.2007.04.049 |
Título revista: | Physica B: Condensed Matter
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Título revista abreviado: | Phys B Condens Matter
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ISSN: | 09214526
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CODEN: | PHYBE
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214526_v398_n2_p407_Garcia |
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Citas:
---------- APA ----------
García, D.J., Miranda, E., Hallberg, K. & Rozenberg, M.J.
(2007)
. Metal-insulator transition in correlated systems: A new numerical approach. Physica B: Condensed Matter, 398(2), 407-411.
http://dx.doi.org/10.1016/j.physb.2007.04.049---------- CHICAGO ----------
García, D.J., Miranda, E., Hallberg, K., Rozenberg, M.J.
"Metal-insulator transition in correlated systems: A new numerical approach"
. Physica B: Condensed Matter 398, no. 2
(2007) : 407-411.
http://dx.doi.org/10.1016/j.physb.2007.04.049---------- MLA ----------
García, D.J., Miranda, E., Hallberg, K., Rozenberg, M.J.
"Metal-insulator transition in correlated systems: A new numerical approach"
. Physica B: Condensed Matter, vol. 398, no. 2, 2007, pp. 407-411.
http://dx.doi.org/10.1016/j.physb.2007.04.049---------- VANCOUVER ----------
García, D.J., Miranda, E., Hallberg, K., Rozenberg, M.J. Metal-insulator transition in correlated systems: A new numerical approach. Phys B Condens Matter. 2007;398(2):407-411.
http://dx.doi.org/10.1016/j.physb.2007.04.049