LATTICE INSTABILITIES IN CUPRATE SUPERCONDUCTORS - A POSSIBLE LIMITING MECHANISM FOR T(C)

被引：55

作者：

LANG, M

KURSCH, R

GRAUEL, A

GEIBEL, C

STEGLICH, F

RIETSCHEL, H

WOLF, T

HIDAKA, Y

KUMAGAI, K

MAENO, Y

FUJITA, T

机构：

[1] KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH, W-7500 KARLSRUHE 1, GERMANY

[2] NIPPON TELEGRAPH & TEL PUBL CORP, IBARAKI ELECT COMMUN LABS, TOKAI, IBARAKI 31911, JAPAN

[3] HOKKAIDO UNIV, DEPT PHYS, SAPPORO, HOKKAIDO 060, JAPAN

[4] HIROSHIMA UNIV, DEPT PHYS, HIROSHIMA 730, JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.69.482

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

High-resolution thermal-expansion experiments on (i) insulating La2CuO4+delta, (ii) its Sr- and Ba-doped metallic counterparts with reduced T(c) values, and (iii) Nd(1.85)Ce0.15CuO4-delta (T(c) congruent-to 24 K) reveal distinct lattice instabilities at T1 = 32 +/- 1 K and T2 = 36 +/- 1 K. T2 coincides with T(c)max found upon 15 at.% Sr doping. For YBa2Cu3O6.5 (T(c) = 49 K), a lattice instability occurs at T = 90 +/- 1 K, i.e., again close to T(c)max = 92 K.

引用

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页码：482 / 485

页数：4

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