Extended universal finite-T renormalization of excitations in a class of one-dimensional quantum magnets

被引：40

作者：

Zheludev, A. ^{[1
]}

Garlea, V. O. ^{[1
]}

Regnault, L. -P. ^{[2
]}

Manaka, H. ^{[3
]}

Tsvelik, A. ^{[4
]}

Chung, J. -H. ^{[5
]}

机构：

[1] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA

[2] CEA, DRFMC SPSMS MDN, F-38054 Grenoble 9, France

[3] Kagoshima Univ, Grad Sch Sci & Engn, Kagoshima 8900065, Japan

[4] Brookhaven Natl Lab, Upton, NY 11973 USA

[5] Natl Inst Stand & Technol, NCNR, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.100.157204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Temperature dependencies of gap energies and magnon lifetimes are measured in the quasi-one-dimensional S=1/2 gapped quantum magnets (CH(3))(2)CHNH(3)CuCL(3) (IPA-CuCl(3), where IPA denotes isopropyl ammonium) and Cu(2)Cl(4)center dot D(8)C(4)SO(2) (Sul-Cu(2)Cl(4)) using inelastic neutron scattering. The results are compared to those found in literature for S=1 Haldane spin chain materials and to theoretical calculations for the O(3)- and O(N)- quantum nonlinear sigma-models. It is found that when the T=0 energy gap Delta is used as the temperature scale, all experimental and theoretical curves are identical to within system-dependent but temperature-independent scaling factors of the order of unity. This quasi-universality extends over a surprising broad T range, at least up to kappa T similar to 1.5 Delta.

引用

页数：4

共 30 条

[1] EXCITATION SPECTRUM OF HEISENBERG SPIN LADDERS [J].

BARNES, T ;

DAGOTTO, E ;

RIERA, J ;

SWANSON, ES .

PHYSICAL REVIEW B, 1993, 47 (06) :3196-3203

[2] EXPERIMENTAL-EVIDENCE FOR THE HALDANE GAP IN A SPIN-1, NEARLY ISOTROPIC, ANTIFERROMAGNETIC CHAIN [J].

BUYERS, WJL ;

MORRA, RM ;

ARMSTRONG, RL ;

HOGAN, MJ ;

GERLACH, P ;

HIRAKAWA, K .

PHYSICAL REVIEW LETTERS, 1986, 56 (04) :371-374

[3] Spin dynamics and transport in gapped one-dimensional Heisenberg antiferromagnets at nonzero temperatures [J].

Damle, K ;

Sachdev, S .

PHYSICAL REVIEW B, 1998, 57 (14) :8307-8339

[4] Excitations from a Bose-Einstein condensate of magnons in coupled spin ladders [J].

Garlea, V. O. ;

Zheludev, A. ;

Masuda, T. ;

Manaka, H. ;

Regnault, L.-P. ;

Ressouche, E. ;

Grenier, B. ;

Chung, J.-H. ;

Qiu, Y. ;

Habicht, K. ;

Kiefer, K. ;

Boehm, M. .

PHYSICAL REVIEW LETTERS, 2007, 98 (16)

[5] Excitations in a four-leg antiferromagnetic Heisenberg spin tube [J].

Garlea, V. O. ;

Zheludev, A. ;

Regnault, L. -P. ;

Chung, J. -H. ;

Qiu, Y. ;

Boehm, M. ;

Habicht, K. ;

Meissner, M. .

PHYSICAL REVIEW LETTERS, 2008, 100 (03)

[6] HALDANE GAPS IN A SPIN-1 HEISENBERG CHAIN WITH EASY-PLANE SINGLE-ION-ANISOTROPY [J].

GOLINELLI, O ;

JOLICOEUR, T ;

LACAZE, R .

PHYSICAL REVIEW B, 1992, 45 (17) :9798-9805

[7] 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

[8] NON-LINEAR FIELD-THEORY OF LARGE-SPIN HEISENBERG ANTI-FERROMAGNETS - SEMI-CLASSICALLY QUANTIZED SOLITONS OF THE ONE-DIMENSIONAL EASY-AXIS NEEL STATE [J].

HALDANE, FDM .

PHYSICAL REVIEW LETTERS, 1983, 50 (15) :1153-1156

[9] SIGMA-MODEL STUDY OF HALDANE-GAP ANTIFERROMAGNETS [J].

JOLICOEUR, T ;

GOLINELLI, O .

PHYSICAL REVIEW B, 1994, 50 (13) :9265-9273

[10] Evolution of spin excitations in a gapped antiferromagnet from the quantum to the high-temperature limit [J].

Kenzelmann, M ;

Cowley, RA ;

Buyers, WJL ;

Coldea, R ;

Enderle, M ;

McMorrow, DF .

PHYSICAL REVIEW B, 2002, 66 (17) :1-14

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