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

共 39 条

[1] Exact two-spinon dynamical correlation function of the one-dimensional Heisenberg model [J].

Bougourzi, AH ;

Couture, M ;

Kacir, M .

PHYSICAL REVIEW B, 1996, 54 (18) :12669-12672

[2] Dynamics and transport in random antiferromagnetic spin chains [J].

Damle, K ;

Motrunich, O ;

Huse, DA .

PHYSICAL REVIEW LETTERS, 2000, 84 (15) :3434-3437

[3] LOW-TEMPERATURE PROPERTIES OF THE RANDOM HEISENBERG ANTI-FERROMAGNETIC CHAIN [J].

DASGUPTA, C ;

MA, S .

PHYSICAL REVIEW B, 1980, 22 (03) :1305-1319

[4]

Dender D. C., 1997, THESIS J HOPKINS U B

[5] Magnetic properties of a quasi-one-dimensional S=1/2 antiferromagnet: Copper benzoate [J].

Dender, DC ;

Davidovic, D ;

Reich, DH ;

Broholm, C ;

Lefmann, K ;

Aeppli, G .

PHYSICAL REVIEW B, 1996, 53 (05) :2583-2589

[6] Direct observation of field-induced incommensurate fluctuations in a one-dimensional S=1/2 antiferromagnet [J].

Dender, DC ;

Hammar, PR ;

Reich, DH ;

Broholm, C ;

Aeppli, G .

PHYSICAL REVIEW LETTERS, 1997, 79 (09) :1750-1753

[7] MAGNETIC-IMPURITIES IN HALF-INTEGER-SPIN HEISENBERG ANTIFERROMAGNETIC CHAINS [J].

EGGERT, S ;

AFFLECK, I .

PHYSICAL REVIEW B, 1992, 46 (17) :10866-10883

[8] WHAT IS THE SPIN OF A SPIN-WAVE [J].

FADDEEV, LD ;

TAKHTAJAN, LA .

PHYSICS LETTERS A, 1981, 85 (6-7) :375-377

[9] RANDOM ANTIFERROMAGNETIC QUANTUM SPIN CHAINS [J].

FISHER, DS .

PHYSICAL REVIEW B, 1994, 50 (06) :3799-3821

[10] LOCALIZATION AND INTERACTION IN ONE-DIMENSIONAL QUANTUM FLUIDS [J].

GIAMARCHI, T ;

SCHULZ, HJ .

EUROPHYSICS LETTERS, 1987, 3 (12) :1287-1293

← 1 2 3 4 →