Novel longitudinal mode in the coupled quantum chain compound KCuF3

被引：81

作者：

Lake, B ^{[1
]}

Tennant, DA ^{[1
]}

Nagler, SE ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.85.832

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Inelastic neutron scattering measurements are reported that show a new longitudinal mode in the antiferromagnetically ordered phase of the spin-1/2 quasi-one-dimensional antiferromagnet KCuF3. This mode signals the crossover from one-dimensional to three-dimensional behavior and indicates a reduction in the ordered spin moment of a spin-1/2 antiferromagnet. The measurements an compared with recent quantum field theory calculations and are found to be in excellent agreement. A feature of the data not predicted by theory is a damping of the mode by decay processes to the transverse spin-wave branches.

引用

页码：832 / 835

页数：4

共 17 条

[11] Polarized-neutron observation of longitudinal haldane-gap excitations in Nd2BaNiO5 [J].

Raymond, S ;

Yokoo, T ;

Zheludev, A ;

Nagler, SE ;

Wildes, A ;

Akimitsu, J .

PHYSICAL REVIEW LETTERS, 1999, 82 (11) :2382-2385

[12] NEUTRON-SCATTERING STUDY OF SPIN-WAVES IN ONE-DIMENSIONAL ANTI-FERROMAGNET KCUF3 [J].

SATIJA, SK ;

AXE, JD ;

SHIRANE, G ;

YOSHIZAWA, H ;

HIRAKAWA, K .

PHYSICAL REVIEW B, 1980, 21 (05) :2001-2007

[13] Dynamics of coupled quantum spin chains [J].

Schulz, HJ .

PHYSICAL REVIEW LETTERS, 1996, 77 (13) :2790-2793

[14] EFFECTS OF COUPLING BETWEEN CHAINS ON THE MAGNETIC EXCITATION SPECTRUM OF KCUF3 [J].

TENNANT, DA ;

NAGLER, SE ;

WELZ, D ;

SHIRANE, G ;

YAMADA, K .

PHYSICAL REVIEW B, 1995, 52 (18) :13381-13389

[15] MEASUREMENT OF THE SPIN-EXCITATION CONTINUUM IN ONE-DIMENSIONAL KCUF3 USING NEUTRON-SCATTERING [J].

TENNANT, DA ;

COWLEY, RA ;

NAGLER, SE ;

TSVELIK, AM .

PHYSICAL REVIEW B, 1995, 52 (18) :13368-13380

[16] UNBOUND SPINONS IN THE S = 1/2 ANTIFERROMAGNETIC CHAIN KCUF3 [J].

TENNANT, DA ;

PERRING, TG ;

COWLEY, RA ;

NAGLER, SE .

PHYSICAL REVIEW LETTERS, 1993, 70 (25) :4003-4006

[17] BaCu2Si2O7:: A quasi-one-dimensional S=1/2 antiferromagnetic chain system [J].

Tsukada, I ;

Sasago, Y ;

Uchinokura, K ;

Zheludev, A ;

Maslov, S ;

Shirane, G ;

Kakurai, K ;

Ressouche, E .

PHYSICAL REVIEW B, 1999, 60 (09) :6601-6607

← 1 2 →