ANOMALY OF PHONON STATE OF SUPERCONDUCTING YBA2CU3O7 STUDIED BY INELASTIC NEUTRON-SCATTERING

被引：121

作者：

ARAI, M

YAMADA, K

HIDAKA, Y

ITOH, S

BOWDEN, ZA

TAYLOR, AD

ENDOH, Y

机构：

[1] TOHOKU UNIV, FAC SCI, SENDAI, MIYAGI 980, JAPAN

[2] NIPPON TELEGRAPH & TEL PUBL CORP, APPL ELECTR LABS, TOKAI, IBARAKI, JAPAN

[3] NATL LAB HIGH ENERGY PHYS, TSUKUBA, IBARAKI 305, JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.69.359

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Inelastic neutron scattering measurements over a wide Q-E range have been performed on superconducting YBa2Cu3O7. Fine structure in its phonon density of states as well as the Q dependence of excitations was revealed by means of a high-energy-resolution chopper spectrometer at a pulsed neutron source. The temperature dependence showed an anomalous behavior at T(c) similar to critical phenomena, which could be due to a local distortion and an expansion of the dynamical correlation length. The distortion is associated with a [110] buckling structure, which is commonly observed in the orthorhombic phase-of La2-xBaxCuO4 and in Tl2Ba2CaCu2O8 in the superconducting state.

引用

页码：359 / 362

页数：4

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