Spin-density-wave instabilites for imperfectly nested fermi surfaces : application to bedt-ttf salts
We discuss criteria for determining the optimal nesting vector from the maximum of the zero-field susceptibility for imperfectly nested Fermi surfaces. In particular, we present results for some of the bis(ethylenedithio) tetrathiafulvalene charge-transfer salts, a family of quasi-two-dimensional or...
| Autores: | , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1996 |
| País: | Brasil |
| Institución: | Universidade Federal do Rio Grande do Sul (UFRGS) |
| Repositorio: | Repositório Institucional da UFRGS |
| Idioma: | inglés |
| OAI Identifier: | oai:www.lume.ufrgs.br:10183/104211 |
| Acceso en línea: | http://hdl.handle.net/10183/104211 |
| Access Level: | acceso abierto |
| Palabra clave: | Física da matéria condensada Ondas de spin Ondas de densidade spin |
| Sumario: | We discuss criteria for determining the optimal nesting vector from the maximum of the zero-field susceptibility for imperfectly nested Fermi surfaces. In particular, we present results for some of the bis(ethylenedithio) tetrathiafulvalene charge-transfer salts, a family of quasi-two-dimensional organic conductors. The criteria proposed gives better nesting than the previous criteria that has been applied to the tetramethyltetraselenafulvalene family, in which the nesting vector translates a point of inflection on the Fermi surface. We discuss the nesting vectors deduced, and consequences for Fermi-surface reconstruction and low-temperature behavior. |
|---|