Solitary magnetic excitations in the low-carrier density, one-dimensional S=1/2 antiferromagnet Yb4As3

被引：53

作者：

Köppen, M

Lang, M

Helfrich, R

Steglich, F

Thalmeier, P

Schmidt, B

Wand, B

Pankert, D

Benner, H

Aoki, H

Ochiai, A

机构：

[1] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[2] Tech Univ Darmstadt, Inst Solid State Phys, D-64289 Darmstadt, Germany

[3] Niigata Univ, Dept Mat Sci & Technol, Niigata 95021, Japan

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.82.4548

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report low-temperature measurements of the specific heat, thermal expansion, and thermal conductivity on the quasi-one-dimensional, effective S = 1/2 Heisenberg antiferromagnet Yb4As3. Distinct field-induced anomalies were found in the above quantities which are well described by the classical sine-Gordon soliton solution for an easy-plane Heisenberg antiferromagnet. Our findings strongly suggest that Yb4As3 represents the first example of an antiferromagnetic S = 1/2 spin-chain system where this type of nonlinear excitation could be identified. [S0031-9007(99)09295-9].

引用

页码：4548 / 4551

页数：4

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