Doping dependence of the oxygen isotope effect in YBa2Cu3Ox

被引：26

作者：

Zech, D ^{[1
]}

Conder, K ^{[1
]}

Keller, H ^{[1
]}

Kaldis, E ^{[1
]}

Muller, KA ^{[1
]}

机构：

[1] ETH ZURICH, FESTKORPERPHYS LAB, CH-8093 ZURICH, SWITZERLAND

来源：

PHYSICA B-CONDENSED MATTER | 1996年 / 219-20卷

关键词：

D O I：

10.1016/0921-4526(95)00674-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Measurements of the total oxygen isotope shift lo and the condensate density n of YBa2Cu3Ox (6.53 < x < 6.99) are presented. The T-c(n) dependence exhibits a two-plateau behavior which is associated with the ortho-I and ortho-II phase, respectively. Around optimum doping (x similar or equal to 6.9) and at the onset of the 60 K plateau where T-c only weakly depends on n the small alpha(o) similar or equal to 0.02.5 is associated to changes in the phonon spectrum. A further decrease of T-c leads to a rapid increase of alpha(o) proportional to partial derivative T-c/partial derivative(n) suggesting that alpha(o) is related to a change of the condensate density n upon isotope exchange.

引用

页码：136 / 138

页数：3

共 14 条

[11]

ZECH D, 1995, ANHARMONIC PROPERTIE, P18

[12] OBSERVATION OF A POSSIBLE OXYGEN-ISOTOPE EFFECT ON THE EFFECTIVE-MASS OF CARRIERS IN YBA2CU3O6.94 [J].

ZHAO, GM ;

MORRIS, DE .

PHYSICAL REVIEW B, 1995, 51 (22) :16487-16490

[13] MUON-SPIN-ROTATION STUDIES OF THE TEMPERATURE-DEPENDENCE OF THE MAGNETIC PENETRATION DEPTH IN THE YBA2CU3OX FAMILY AND RELATED-COMPOUNDS [J].

ZIMMERMANN, P ;

KELLER, H ;

LEE, SL ;

SAVIC, IM ;

WARDEN, M ;

ZECH, D ;

CUBITT, R ;

FORGAN, EM ;

KALDIS, E ;

KARPINSKI, J ;

KRUGER, C .

PHYSICAL REVIEW B, 1995, 52 (01) :541-552

[14]

[No title captured]

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