Shifting of the magnetic-resonance peak to lower energy in the superconducting state of underdoped YBa2Cu3O6.8

被引：21

作者：

Bourges, P

Regnault, LP

Sidis, Y

Bossy, J

Burlet, P

Vettier, C

Henry, JY

Couach, M

机构：

[1] CEA GRENOBLE,DEPT RECH FONDAMENTALE MATIERE CONDENSEE,F-38054 GRENOBLE 9,FRANCE

[2] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE 9,FRANCE

[3] EUROPEAN SYNCHROTRON RES FACIL,F-38043 GRENOBLE,FRANCE

来源：

EUROPHYSICS LETTERS | 1997年 / 38卷 / 04期

关键词：

D O I：

10.1209/epl/i1997-00244-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Inelastic neutron scattering has been used to determine the dynamic spin fluctuations in an underdoped high-temperature superconductor YBCO6.8 single crystal. The magnetic resonance, that occurs around 40 meV in overdoped samples, is shifted to a lower energy, E-r = 34 meV. A constant ratio, E-r/k(B)T(C) = 4.9 +/- 0.2, almost independent of the doping level, is found. According to numerous theoretical approaches, this finding supports the idea that the resonance energy is proportional (approximately twice) to the superconducting gap.

引用

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页码：313 / 318

页数：6

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