TY - JOUR

T1 - Exact calculation of the ground-state dynamical spin correlation function of a S=1/2 antiferromagnetic Heisenberg chain with free spinons

AU - Haldane, F. D.M.

AU - Zirnbauer, M. R.

PY - 1993

Y1 - 1993

N2 - We calculate the exact dynamical magnetic structure factor S(Q,E) in the ground state of a one-dimensional S=1/2 antiferromagnet with gapless free S=1/2 spinon excitations, the Haldane-Shastry model with inverse-square exchange, which is in the same low-energy universality class as Bethe's nearest-neighbor exchange model. Only two-spinon excited states contribute, and S(Q,E) is found to be a very simple integral over these states.

AB - We calculate the exact dynamical magnetic structure factor S(Q,E) in the ground state of a one-dimensional S=1/2 antiferromagnet with gapless free S=1/2 spinon excitations, the Haldane-Shastry model with inverse-square exchange, which is in the same low-energy universality class as Bethe's nearest-neighbor exchange model. Only two-spinon excited states contribute, and S(Q,E) is found to be a very simple integral over these states.

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U2 - 10.1103/PhysRevLett.71.4055

DO - 10.1103/PhysRevLett.71.4055

M3 - Article

C2 - 10055142

AN - SCOPUS:4244178531

SN - 0031-9007

VL - 71

SP - 4055

EP - 4058

JO - Physical Review Letters

JF - Physical Review Letters

IS - 24

ER -