Spin Pseudogap in Ni-Doped SrCuO2

被引：39

作者：

Simutis, G. ^{[1
]}

Gvasaliya, S. ^{[1
]}

Mansson, M. ^{[1
]}

Chernyshev, A. L. ^{[2
]}

Mohan, A. ^{[3
]}

Singh, S. ^{[3
]}

Hess, C. ^{[3
]}

Savici, A. T. ^{[4
]}

Kolesnikov, A. I. ^{[4
]}

Piovano, A. ^{[5
]}

Perring, T. ^{[6
]}

Zaliznyak, I. ^{[7
]}

Buechner, B. ^{[3
,8
]}

Zheludev, A. ^{[1
]}

机构：

[1] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland

[2] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[3] Leibniz Inst Solid State & Mat Res IFW Dresden, D-01171 Dresden, Germany

[4] Oak Ridge Natl Lab, NScD, Oak Ridge, TN 37831 USA

[5] Inst Laue Langevin, F-38042 Grenoble 9, France

[6] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 OQX, Oxon, England

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

[8] Tech Univ Dresden, Dept Phys, D-01069 Dresden, Germany

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 06期

关键词：

HEISENBERG ANTIFERROMAGNETIC CHAIN; DIMENSIONAL S=1/2 ANTIFERROMAGNET; DYNAMICS; LOCALIZATION; TRANSPORT; SYSTEMS; FIELD;

D O I：

10.1103/PhysRevLett.111.067204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The S = 1/2 spin chain material SrCuO2 doped with 1% S = 1 Ni impurities is studied by inelastic neutron scattering. At low temperatures, the spectrum shows a pseudogap Delta approximate to 8 meV, absent in the parent compound, and not related to any structural phase transition. The pseudogap is shown to be a generic feature of quantum spin chains with dilute defects. A simple model based on this idea quantitatively accounts for the experimental data measured in the temperature range from 2 to 300 K, and allows us to represent the momentum-integrated dynamic structure factor in a universal scaling form.

引用

页数：5

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