TY - JOUR

T1 - Exact dynamical structure factor of the degenerate haldane-shastry model

AU - Yamamoto, Takashi

AU - Saiga, Yasuhiro

AU - Arikawa, Mitsuhiro

AU - Kuramoto, Yoshio

PY - 2000

Y1 - 2000

N2 - The dynamical structure factor S(q, w) of the K-component (K = 2, 3, 4) spin chain with a 1/r2 interaction is derived exactly at zero temperature for the arbitrary size of the system. The result is interpreted in terms of a free quasiparticle picture which is a generalization of the spinon picture in the SU(2) case. The excited states consist of K quasiparticles each of which is characterized by a set of K − 1 quantum numbers. Divergent singularities of s(q, w) at the spectral edges are derived analytically. The analytic result is checked numerically for finite systems.

AB - The dynamical structure factor S(q, w) of the K-component (K = 2, 3, 4) spin chain with a 1/r2 interaction is derived exactly at zero temperature for the arbitrary size of the system. The result is interpreted in terms of a free quasiparticle picture which is a generalization of the spinon picture in the SU(2) case. The excited states consist of K quasiparticles each of which is characterized by a set of K − 1 quantum numbers. Divergent singularities of s(q, w) at the spectral edges are derived analytically. The analytic result is checked numerically for finite systems.

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U2 - 10.1103/PhysRevLett.84.1308

DO - 10.1103/PhysRevLett.84.1308

M3 - Article

AN - SCOPUS:0242384643

VL - 84

SP - 1308

EP - 1311

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 6

ER -