Optimal doping for d-wave superconducting ground states within the generalized Hubbard model
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| Format: | Artículo científico |
| Language: | en |
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Sociedad Mexicana de Física A.C.
2018
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| author | B. Millan |
| author_facet | B. Millan |
| contents | Optimal doping for d-wave superconducting ground states within the generalized Hubbard model B. Millan L.A. Perez J. Samuel Millan Física, Astronomía y Matemáticas wave) pseudogap regime pairing symmetries (other than s Theories and models of superconducting state A single-band generalized Hubbard model that describes two-dimensional superconductivity with d-wave symmetry on a square lattice within the BCS formalism is considered. For a set of Hamiltonian parameters and varying the ratio between nearest-neighbor and nextnearest neighbor hoppings (t 0 /t); an optimal electron density (nop) can be found for each t 0 /t value, where the temperature is maximum (Tc-max). After calculating the superconducting gap at T=0 K and the corresponding ground state energy (Eg) for all the carrier concentrations, a ground state energy minimum (Eg-min) is found close to half filling. Since Tc-max is the highest critical temperature for a given ratio t 0 /t, the minimum of all the Tc-max values defines a supreme for this set of temperatures, named as Tc-max-sup. The corresponding optimal doping for Tc-max-sup will be called nop-sup, and the results show that Eg-min is located at nop-sup. The Fermi surface (FS) is analyzed for carrier concentrations close to nop-sup and it is suggested that the location for over (OD) and under (UD) doping regimes (nOD > nop-sup > nUD) could define a pseudogap zone for high critical temperature superconductors. 2018 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57082913005 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.3 Vol.64 |
| format | Artículo científico |
| id | redalyc_57082913005 |
| institution | Redalyc |
| language | en |
| publishDate | 2018 |
| publisher | Sociedad Mexicana de Física A.C. |
| spellingShingle | Optimal doping for d-wave superconducting ground states within the generalized Hubbard model B. Millan Física, Astronomía y Matemáticas wave) pseudogap regime pairing symmetries (other than s Theories and models of superconducting state Optimal doping for d-wave superconducting ground states within the generalized Hubbard model B. Millan L.A. Perez J. Samuel Millan Física, Astronomía y Matemáticas wave) pseudogap regime pairing symmetries (other than s Theories and models of superconducting state A single-band generalized Hubbard model that describes two-dimensional superconductivity with d-wave symmetry on a square lattice within the BCS formalism is considered. For a set of Hamiltonian parameters and varying the ratio between nearest-neighbor and nextnearest neighbor hoppings (t 0 /t); an optimal electron density (nop) can be found for each t 0 /t value, where the temperature is maximum (Tc-max). After calculating the superconducting gap at T=0 K and the corresponding ground state energy (Eg) for all the carrier concentrations, a ground state energy minimum (Eg-min) is found close to half filling. Since Tc-max is the highest critical temperature for a given ratio t 0 /t, the minimum of all the Tc-max values defines a supreme for this set of temperatures, named as Tc-max-sup. The corresponding optimal doping for Tc-max-sup will be called nop-sup, and the results show that Eg-min is located at nop-sup. The Fermi surface (FS) is analyzed for carrier concentrations close to nop-sup and it is suggested that the location for over (OD) and under (UD) doping regimes (nOD > nop-sup > nUD) could define a pseudogap zone for high critical temperature superconductors. 2018 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57082913005 en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.3 Vol.64 |
| title | Optimal doping for d-wave superconducting ground states within the generalized Hubbard model |
| topic | Física, Astronomía y Matemáticas wave) pseudogap regime pairing symmetries (other than s Theories and models of superconducting state |
| url | https://www.redalyc.org/articulo.oa?id=57082913005 |