Site-selective oxygen isotope effect on the magnetic-field penetration depth in underdoped Y0.6Pr0.4Ba2Cu3O7-δ -: art. no. 220506

被引：39

作者：

Khasanov, R

Shengelaya, A

Morenzoni, E

Angst, M

Conder, K

Savic, IM

Lampakis, D

Liarokapis, E

Tatsi, A

Keller, H

机构：

[1] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

[2] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

[3] ETH, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[4] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[5] Univ Belgrade, Fac Phys, YU-11001 Belgrade, Serbia Monteneg, Serbia

[6] Natl Tech Univ Athens, Dept Phys, Athens 15780, Greece

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.68.220506

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report site-selective oxygen isotope (O-16/O-18) effect (OIE) measurements on the in-plane penetration depth lambda(ab) in underdoped Y0.6Pr0.4Ba2Cu3O7-delta, using the muon-spin rotation technique. A pronounced OIE on the transition temperature T-c as well as on lambda(ab)(-2)(0) was observed, which mainly arises from the oxygen sites within the superconducting CuO2 planes (100% within error bar). The values of the corresponding relative isotope shifts were found to be DeltaT(c)/T-c=-3.7(4)% and Deltalambda(ab)(-2)(0)/lambda(ab)(-2)(0)=-6.2(1.0)%. Our results imply that in this compound the phonon modes involving the movement of planar oxygen are dominantly coupled to the electrons.

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