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.
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页码：359 / 362
页数：4
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