Néel Order in Doped Quasi-One-Dimensional Antiferromagnets

Sebastian Eggert; Ian Affleck; Matthew D. P. Horton

doi:10.1103/PhysRevLett.89.047202

Néel Order in Doped Quasi-One-Dimensional Antiferromagnets

Sebastian Eggert, Ian Affleck, and Matthew D. P. Horton

Phys. Rev. Lett. 89, 047202 – Published 8 July 2002

Abstract

We study the Néel temperature of quasi-one-dimensional $S = 1 / 2$ antiferromagnets containing nonmagnetic impurities. We first consider the temperature dependence of the staggered susceptibility of finite chains with open boundary conditions, which shows an interesting difference for even and odd length chains. We then use a mean field theory treatment to incorporate the three-dimensional interchain couplings. The resulting Néel temperature shows a pronounced drop as a function of doping by up to a factor of 5.

Received 29 March 2002

DOI:https://doi.org/10.1103/PhysRevLett.89.047202

Authors & Affiliations

Sebastian Eggert¹, Ian Affleck^2,*, and Matthew D. P. Horton³

¹Institute of Theoretical Physics, Chalmers University of Technology and Göteborg University, S-412 96 Göteborg, Sweden
²Physics Department, Boston University, Boston, Massachusetts 02215
³99 John Street, New York, New York 10038

^*On leave from Canadian Institute for Advanced Research and Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, Canada V6T 1Z1.