Neutron scattering and the B1g phonon in the cuprates

被引：20

作者：

Devereaux, TP ^{[1
]}

Virosztek, A

Zawadowski, A

机构：

[1] George Washington Univ, Dept Phys, Washington, DC 20052 USA

[2] Hungarian Acad Sci, Inst Phys, H-1521 Budapest, Hungary

[3] Hungarian Acad Sci, Res Grp, H-1521 Budapest, Hungary

[4] Solid State Phys Res Inst, H-1525 Budapest, Hungary

来源：

PHYSICAL REVIEW B | 1999年 / 59卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.59.14618

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The momentum-dependent line shape of the out-of-phase oxygen vibration as measured in recent neutron-scattering measurements is investigated. Starting from a microscopic coupling of the phonon vibration to a local crystal field, the phonon line shift and broadening is calculated as a function of transferred momentum in the superconducting state of YBa2Cu3O7. The absolute magnitude of the shift is obtained as a function of momentum and is found to be in excellent agreement with experiment. It is shown that the anisotropy of the density of states, superconducting energy gap, and the electron-phonon coupling are all crucial in order to explain these experiments.

引用

页码：14618 / 14623

页数：6

共 29 条

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