LOW-ENERGY INCOMMENSURATE SPIN EXCITATIONS IN SUPERCONDUCTING LA1.85SR0.15CUO4

被引：150

作者：

THURSTON, TR

GEHRING, PM

SHIRANE, G

BIRGENEAU, RJ

KASTNER, MA

ENDOH, Y

MATSUDA, M

YAMADA, K

KOJIMA, H

TANAKA, I

机构：

[1] MIT,DEPT PHYS,CAMBRIDGE,MA 02139

[2] TOHOKU UNIV,DEPT PHYS,SENDAI,MIYAGI 980,JAPAN

[3] YAMANASHI UNIV,FAC ENGN,INORGAN SYNTH FACIL,KOFU,YAMANASHI 400,JAPAN

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.46.9128

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Neutron-scattering experiments with markedly improved signal-to-noise ratios have been performed on single-crystal superconducting La1.85Sr0.15CuO4 (T(c) = 33 K) at energies down to 1.5 meV. The measurements provide quantitative information on the temperature dependence of chi"(q,omega). Surprisingly, chi"(q(peak),omega) is approximately constant below T(c) for the measured energies 1.5 meV less-than-or-equal-to omega less-than-or-equal-to 6 meV, that is, for energies much less than the mean-field BCS gap energy of approximately 10 meV, hence implying other than conventional s-wave superconductivity.

引用

页码：9128 / 9131

页数：4

共 14 条

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[10]

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