Spin thermal conductivity of the Haldane chain compound Y2BaNiO5

被引：30

作者：

Kordonis, K. ^{[1
]}

Sologubenko, A. V.

Lorenz, T.

Cheong, S. -W.

Freimuth, A.

机构：

[1] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[2] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.97.115901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the thermal conductivity of the spin S=1 chain compound Y2BaNiO5. Analyzing the anisotropy of the thermal transport allows us to identify a definite spin-mediated thermal conductivity kappa(s) along the chain direction. The calculated spin-related energy diffusion constant D-E(T) shows a broad peak around 120 K. Close to room temperature, D-E(T) approaches the theoretically predicted high-temperature value, while scattering of spin excitations by magnetic impurities seems to be the major limiting factor of kappa(s) at low temperature.

引用

页数：4

共 43 条

[1] Thermal conductivity of the spin-Peierls compound CuGeO3 [J].

Ando, Y ;

Takeya, J ;

Sisson, DL ;

Doettinger, SG ;

Tanaka, I ;

Feigelson, RS ;

Kapitulnik, A .

PHYSICAL REVIEW B, 1998, 58 (06) :R2913-R2916

[2] HALDANE SPIN-STATE IN Y2BA(NI, ZN OR MG)O5 [J].

BATLOGG, B ;

CHEONG, SW ;

RUPP, LW .

PHYSICA B, 1994, 194 :173-174

[3] Magnetic heat transport in R2CuO4 (R=La, Pr, Nd, Sm, Eu, and Gd) [J].

Berggold, K ;

Lorenz, T ;

Baier, J ;

Kriener, M ;

Senff, D ;

Roth, H ;

Severing, A ;

Hartmann, H ;

Freimuth, A ;

Barilo, S ;

Nakamura, F .

PHYSICAL REVIEW B, 2006, 73 (10)

[4]

Berman R., 1976, THERMAL CONDUCTION S

[5] LOWER LIMIT TO THE THERMAL-CONDUCTIVITY OF DISORDERED CRYSTALS [J].

CAHILL, DG ;

WATSON, SK ;

POHL, RO .

PHYSICAL REVIEW B, 1992, 46 (10) :6131-6140

[6] INTEGRABILITY AND IDEAL CONDUCTANCE AT FINITE TEMPERATURES [J].

CASTELLA, H ;

ZOTOS, X ;

PRELOVSEK, P .

PHYSICAL REVIEW LETTERS, 1995, 74 (06) :972-975

[7] THE COMPOUND Y2BANIO5 - A NEW EXAMPLE OF A HALDANE-GAP IN A S = 1 MAGNETIC CHAIN [J].

DARRIET, J ;

REGNAULT, LP .

SOLID STATE COMMUNICATIONS, 1993, 86 (07) :409-412

[8] Comparison of S=0 and S=1/2 impurities in the Haldane chain compound Y2BaNiO5 -: art. no. 144404 [J].

Das, J ;

Mahajan, AV ;

Bobroff, J ;

Alloul, H ;

Alet, F ;

Sorensen, ES .

PHYSICAL REVIEW B, 2004, 69 (14) :144404-1

[9] PHONON LOCALIZATION IN GLASSES [J].

GRAEBNER, JE ;

GOLDING, B ;

ALLEN, LC .

PHYSICAL REVIEW B, 1986, 34 (08) :5696-5701

[10] CONTINUUM DYNAMICS OF THE 1-D HEISENBERG ANTI-FERROMAGNET - IDENTIFICATION WITH THE O(3) NON-LINEAR SIGMA-MODEL [J].

HALDANE, FDM .

PHYSICS LETTERS A, 1983, 93 (09) :464-468

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