QUANTUM SPIN DYNAMICS OF AN S=3/2 HEISENBERG ANTIFERROMAGNETIC CHAIN - INELASTIC PULSED-NEUTRON SCATTERING FROM CSVCL3

被引：30

作者：

ITOH, S

ENDOH, Y

KAKURAI, K

TANAKA, H

机构：

[1] TOHOKU UNIV,DEPT PHYS,AOBA KU,SENDAI,MIYAGI 980,JAPAN

[2] UNIV TOKYO,INST SOLID STATE PHYS,NEUTRON SCATTERING FACIL,TOKAI,IBARAKI 31911,JAPAN

[3] SOPHIA UNIV,DEPT PHYS,CHIYODA KU,TOKYO 102,JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.74.2375

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Well-defined spin-wave excitations were observed by using pulsed neutrons from CsVCl3, an S=3/2 Heisenberg antiferromagnetic chain. The observed spin-wave dispersion relation shows an enhancement of the excitation energy by a factor of 1.26, which must be compared with the quantum renormalization factor of /2 for an S=1/2 system. The linewidth of the spectrum at 40 K was broad and independent of q. The q-independent linewidth is the first experimental observation, which was predicted by rigorous theories for a classical chain at sufficiently low temperature. © 1995 The American Physical Society.

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页码：2375 / 2378

页数：4

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