Exact thermodynamics and phase diagram of integrable t-J model with chiral interaction

Abstract

We study the phase diagram and finite temperature properties of an integrable generalization of the one-dimensional super-symmetric t-J model containing interactions explicitly breaking parity-time reversal (PT) symmetries. To this purpose, we apply the quantum transfer matrix method which results in a finite set of non-linear integral equations. We obtain numerical solutions to these equations leading to results for thermodynamic quantities as function of temperature, magnetic field, particle density and staggering parameter. Studying the maxima lines of entropy at low but non zero temperature reveals the phase diagram of the model. There are ten different phases which we may classify in terms of the qualitative behaviour of auxiliary functions, closely related to the dressed energy functions.

33 pages, 12 figures

References in corpus (5)

• Thermodynamics of antiferromagnetic alternating spin chains
• Quantum phase transitions and thermodynamics of quantum antiferromagnets with competing interactions
• Magnetocaloric effect in the spin-$1/2$ chain with competing interactions
• Thermodynamics of quantum spin chains with competing interactions
• Next-nearest-neighbor spin-spin and chiral-spin correlation functions in generalized XXX chain