The interactions between polarons and the anharmonic vibrations of the apical oxygen atoms in the normal state of YBa2Cu3O7-δ superconductors have been studied by using a path integral formalism. The temperature effects in the distribution of double-well potentials associated with the anharmonic modes have been taken into account. It is shown that the c-axis electrical resistivity depends linearly on temperature for intermediate values of the overall electron-phonon coupling, whereas strong anharmonicity induces a nonmetallic behavior as a consequence of trapping of the charge carriers.
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Titolo: | c-axis resistivity in high-Tc superconductors |
Autori: | |
Data di pubblicazione: | 1997 |
Rivista: | |
Abstract: | The interactions between polarons and the anharmonic vibrations of the apical oxygen atoms in the normal state of YBa2Cu3O7-δ superconductors have been studied by using a path integral formalism. The temperature effects in the distribution of double-well potentials associated with the anharmonic modes have been taken into account. It is shown that the c-axis electrical resistivity depends linearly on temperature for intermediate values of the overall electron-phonon coupling, whereas strong anharmonicity induces a nonmetallic behavior as a consequence of trapping of the charge carriers. |
Handle: | http://hdl.handle.net/11581/246577 |
Appare nelle tipologie: | Articolo |