Spin pseudogap in the S=1/2 chain material Sr2CuO3 with impurities

被引：9
|
作者：
Simutis, G. [1 ]
Gvasaliya, S. [1 ]
Beesetty, N. S. [2 ]
Yoshida, T. [3 ]
Robert, J. [4 ]
Petit, S. [4 ]
Kolesnikov, A. I. [5 ]
Stone, M. B. [6 ]
Bourdarot, F. [7 ,8 ]
Walker, H. C. [9 ]
Adroja, D. T. [9 ]
Sobolev, O. [10 ]
Hess, C. [11 ]
Masuda, T.
Revcolevschi, A. [2 ]
Buechner, B. [11 ]
Zheludev, A. [1 ]
机构：
[1] ETH, Solid State Phys Lab, Neutron Scattering & Magnetism, Zurich, Switzerland
[2] Univ Paris 11, Synth Proprietes & Modelisat Mat, F-91405 Orsay, France
[3] Univ Tokyo, Inst Solid State Phys, 5-1-5 Kashiwanoha, Kashiwa, Chiba 2778581, Japan
[4] CEA Saclay, CEACNRS, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France
[5] Oak Ridge Natl Lab, Chem & Engn Mat Div, Oak Ridge, TN 37831 USA
[6] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA
[7] Univ Grenoble Alpes, Modelisat & Dexplorat Mat, 17 Rue Martyrs, F-38054 Grenoble, France
[8] CEA, INAC, 17 Rue Martyrs, F-38054 Grenoble, France
[9] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 OQX, Oxon, England
[10] Tech Univ Munich, Forsch Neutronenquelle Heinz Maier Leibnitz FRM 2, D-85747 Garching, Germany
[11] Leibniz Inst Solid State & Mat Res IFW Dresden, POB 270116, D-01171 Dresden, Germany
来源：
PHYSICAL REVIEW B | 2017年 / 95卷 / 05期
基金：
瑞士国家科学基金会;
关键词：
HEISENBERG ANTIFERROMAGNETIC CHAIN; MAGNETIC-SUSCEPTIBILITY; TEMPERATURE; LOCALIZATION; TRANSPORT; SRCUO2;
D O I：
10.1103/PhysRevB.95.054409
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The low-energy magnetic excitation spectrum of the Heisenberg antiferromagnetic S = 1/2 chain system Sr2CuO3 with Ni and Ca impurities is studied by neutron spectroscopy. In all cases, a defect-induced spectral pseudogap is observed and shown to scale proportionately to the number of scattering centers in the spin chains.
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页数：6
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