PHONON DENSITY OF STATES OF SUPERCONDUCTING AND NONSUPERCONDUCTING STATES IN LA1.85SR0.15CU1-XZNXO4 (X=0, 0.02)

被引：17

作者：

ARAI, M

YAMADA, K

HIDAKA, Y

TAYLOR, AD

ENDOH, Y

机构：

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

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

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

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1991年 / 181卷 / 1-3期

关键词：

D O I：

10.1016/0921-4534(91)90333-T

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Inelastic neutron scattering measurements have been performed on superconducting La1.85Sr0.15CuO4 (T(c) = 38 K) and non-superconducting La1.85Sr0.15Cu0.98Zn0.02O4 (T(c) < 5 K). We observed a small but systematic difference in the phonon density of states (PDOS) between the superconducting and the normal state of these samples. This reference in the PDOS mainly corresponds to a change of the Cu-O bond stretching mode in the CuO2 plane. The temperature variation of the PDOS of La1.85Sr0.15CuO4 below (T = 20 K) T(c) and above (T = 50 K) T(c) approximately corresponds to the change induced by the Zn-doping. The possible interpretation of the difference in the vibrational states between the two phases is discussed in terms of electron-phonon coupling and an anomalous local structure change.

引用

页码：45 / 50

页数：6

共 15 条

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