Abstract
We study the effect of quantum fluctuations on the spin stiffness of a disordered two-dimensional anisotropic spin model within an 1/S expansion. We find that these fluctuations, very weak in the pure system, may be quite strong in the presence of bond disorder provided the latter introduces frustration in the system. As a consequence of the disorder-induced increase in the amplitude of zero-point fluctuations, the spin stiffness constant of the system vanishes in certain regions of parameter space, leading to the appearance of a spin-liquid phase in parts of the phase diagram where a spin-glass phase would be expected classically. \textcopyright{} 1996 The American Physical Society.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
