Bosonization study of quantum phase transitions in the one-dimensional asymmetric Hubbard model

Autor:	Wang, Z. G., Chen, Y. G., Gu, S. J.
Rok vydání:	2007
Předmět:	Condensed Matter - Strongly Correlated Electrons
Zdroj:	Z. G. Wang, Y. G. Chen, and S. J. Gu, Phys. Rev. B 75, 165111 (2007)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.75.165111
Popis:	The quantum phase transitions in the one-dimensional asymmetric Hubbard model are investigated with the bosonization approach. The conditions for the phase transition from density wave to phase separation, the correlation functions and their exponents are obtained analytically. Our results show that the difference between the hopping integrals for up- and down-spin electrons is crucial for the happening of the phase separation. When the difference is large enough, the phase separation will appear even if the on-site interaction is small. Comment: 6 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0705.1611 Zobrazit plný text záznamu View this record from Arxiv