Effect of interchain electron transfer on the phase transition of quasi-one-dimensional electron systems

✍ Scribed by Yoshikazu Suzumura; Hidetoshi Fukuyama

• Publisher: Springer US
• Year: 1978
• Tongue: English
• Weight: 328 KB
• Volume: 31
• Category: Article
• ISSN: 0022-2291
• DOI: 10.1007/bf00116240

✦ Synopsis

The critical temperatures of phase transitions of quasi-one-dimensional systems are evaluated by assuming electron transfer between chains with intrachain interactions represented by the model of Bychkov, Gor'kov, and Dzyaloshinskii. We examine only the case of gl > 0, where the renorrealization group theory for an isolated chain gives reliable results. For small electron transfer energy t, the transition temperature Tc is an increasing function of t. As t gets larger, however, Tc becomes a decreasing function of t due to the tunneling of individual electrons, which destroys the coherent pairing states. A symmetry is found to exist between Tc of the triplet superconductivity and that of the spin density wave state which have the highest critical temperatures in the regions of gl > 2g2 and gl < 2g2, respectively.