corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 74 » Issue 7
< Previous Article | Next Article >

Phys. Rev. Lett. 74, 1226–1229 (1995)

Disorder Induced Phase Transition in a Two-Dimensional Random Quantum Antiferromagnet

Download: PDF (221 kB) Buy this article Export: BibTeX or EndNote (RIS)

Anders W. Sandvik* and Marco Vekić†
Department of Physics, University of California, Santa Barbara, California 93106

Received 13 June 1994; published in the issue dated 13 February 1995

A two-dimensional Heisenberg model with random antiferromagnetic nearest-neighbor exchange is studied using quantum Monte Carlo techniques. As the strength of the randomness is increased, the system undergoes a transition from an antiferromagnetically ordered ground state to a gapless disordered state. The finite-size scaling of the staggered structure factor and susceptibility is consistent with a dynamic exponent z=2.

© 1995 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.74.1226
DOI:
10.1103/PhysRevLett.74.1226
PACS:
75.10.Nr, 75.10.Jm, 75.40.Cx, 75.40.Mg

*On leave from Department of Physics, Åbo Akademi University, Finland. Present address: National High Magnetic Field Laboratory, 1800 E. Paul Dirac Dr., Tallahassee, FL 32308.

†Permanent address: Department of Physics, University of California, Davis, CA 95616.

 
< Previous Article | Next Article >