Thermodynamics of the frustrated one-dimensional spin-1/2 Heisenberg ferromagnet in a magnetic field

Autor:	Härtel, M., Richter, J., Ihle, D.
Rok vydání:	2011
Předmět:	Condensed Matter - Strongly Correlated Electrons
Zdroj:	Phys. Rev. B 83, 214412 (2011)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.83.214412
Popis:	We calculate the low-temperature thermodynamic quantities (magnetization, correlation functions, transverse and longitudinal correlation lengths, spin susceptibility, and specific heat) of the frustrated one-dimensional spin-half J1-J2 Heisenberg ferromagnet, i.e. for J2< 0.25|J1|, in an external magnetic field using a second-order Green-function formalism and full diagonalization of finite systems. We determine power-law relations for the field dependence of the position and the height of the maximum of the uniform susceptibility. Considering the specific heat at low magnetic fields, two maxima in its temperature dependence are found. Comment: 9 pages, 9 figures, version as published in PRB
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1102.3581 Zobrazit plný text záznamu View this record from Arxiv