Quantum Phase Transition in Frustrated Two-Dimensional Antiferromagnets

Abstract

We study frustrated, two-dimensional, quantum antiferromagnets in the vicinity of a quantum transition from a non-collinear, magnetically-ordered ground state to a quantum disordered phase. The general scaling properties of this transition are described. A detailed study of a particular field-theoretic model of the transition, with bosonic spin-1/2 spinon fields, is presented. Explicit universal scaling forms for a variety of observables are obtained and the results are compared with numerical data on the spin-1/2 triangular antiferromagnet. Universal properties of an alternative field-theory, with confined spinons, are also briefly noted.

51 pages, REVTEX 3.0, 5 uuencoded EPS figures appended, YCTP-xxzz

References in corpus (8)

• Theory of Two-Dimensional Quantum Heisenberg Antiferromagnets with a Nearly Critical Ground State
• Destructive quantum interference in spin tunneling problems
• Large N expansion for frustrated and doped quantum antiferromagnets
• Universal Magnetic Properties of $L{a}_{2-\delta }S{r}_{\delta }Cu{O}_4$ at Intermediate Temperatures
• Possible Quantum Spin Liquid States on the Triangular and Kagome Lattices
• Polylogarithm Identities in a Conformal Field Theory in Three Dimensions
• A Renormalization Group Study of Helimagnets in D=2+EPSILON Dimensions
• Spin liquid phase for the frustrated Quantum Heisenberg Antiferromagnet on a square lattice

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