Spin-wave condensation and quantum melting of long-range antiferromagnetic order in t-J model

Details Spin-wave condensation and quantum melting of long-range antiferromagnetic order in t-J model Spin-wave condensation and quantum melting of long-range antiferromagnetic order in t-J model

1995-09-04

arxiv.org/abs/cond-mat/9509011v1

Physics

Condensed Matter

LaTeX 19 pages, 13 figures

Scientific paper

10.1103/PhysRevB.54.9988

Ground state wave function of two-dimensional t-J model is found at doping close to half filling. It is shown that the condensation of Cooper pairs (superconducting pairing of mobile holes) and the condensation of spin-waves into spin-liquid state are closely connected. The effective spectrum of $S=1$ excitations, spin-wave gap pseudo-gap $\Delta_M$, magnetic correlation length $\xi_M$, and static magnetic formfactor $S_M(\bf q)$ are calculated.

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