Numerical study of the one-dimensional quantum compass model
Department of Physics, University of Guilan, P.O. Box 41335, -1914, Rasht, Iran
Corresponding author: a email@example.com
Revised: 25 May 2010
Published online: 13 September 2010
The ground state magnetic phase diagram of the one-dimensional quantum compass model (QCM) is studied using the numerical Lanczos method. A detailed numerical analysis of the low energy excitation spectrum is presented. The energy gap and the spin-spin correlation functions are calculated for finite chains. Two kind of the magnetic long-range orders, the Néel and a type of the stripe-antiferromagnet, in the ground state phase diagram are identified. Based on the numerical analysis, the first and second order quantum phase transitions in the ground state phase diagram are identified.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010