STUDY OF THE CHAIN RELATED FERMI-SURFACE IN (R) BA2CU3O7-DELTA

被引：62

作者：

HOFFMANN, L

MANUEL, AA

PETER, M

WALKER, E

GAUTHIER, M

SHUKLA, A

BARBIELLINI, B

MASSIDDA, S

ADAM, G

ADAM, S

HARDY, WN

LIANG, RX

机构：

[1] PHB ECUBLENS, INST ROMAND RECH NUMER, CH-1015 LAUSANNE, SWITZERLAND

[2] UNIV NAPLES, I-80138 NAPLES, ITALY

[3] INT CTR THEORET PHYS, I-34100 TRIESTE, ITALY

[4] INST ATOM PHYS, DEPT THEORET PHYS, BUCHAREST, ROMANIA

[5] UNIV BRITISH COLUMBIA, VANCOUVER V6T 1W5, BC, CANADA

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.71.4047

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have observed, by 2D positron annihilation, the rigid-shaped Fermi surface related to the chains in the compound series (R)Ba2Cu3O7-delta for R = Y, Dy, Ho, and Pr. In the case of Y we have sighted the clear signature of the ridge in the fourth Brillouin zone and have observed the effect of substituting Cu with Ni, Zn, and Al. The presence of the ridge is also seen in PrBa2Cu3O7-delta which has an insulating character. This shows that chains have a Fermi surface but contribute little to conductivity. This observation is discussed in view of the above alloying experiments, and in view of the recent model of Fehren-bacher and Rice.

引用

页码：4047 / 4050

页数：4

共 19 条

[11] POSITRON-ANNIHILATION AND HIGH-TEMPERATURE SUPERCONDUCTIVITY [J].