Effect of Na content and hydration on the excitation spectrum of the cobaltite NaxCoO2•yH2O

被引：24

作者：

Lemmens, P ^{[1
]}

Gnezdilov, V

Kovaleva, NN

Choi, KY

Sakurai, H

Takayama-Muromachi, E

Takada, K

Sasaki, T

Chou, FC

Chen, DP

Lin, CT

Keimer, B

机构：

[1] Max Planck Inst Solid State Res, MPI, FKF, D-70569 Stuttgart, Germany

[2] NASU, BI Verkin Inst Low Temp Phys, UA-61164 Kharkov, Ukraine

[3] Rhein Westfal TH Aachen, Inst Phys 2, D-52056 Aachen, Germany

[4] NIMS, Supercond Mat Ctr, Tsukuba, Ibaraki 3050044, Japan

[5] NIMS, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan

[6] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2004年 / 16卷 / 11期

关键词：

D O I：

10.1088/0953-8984/16/11/041

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report on a Raman scattering study of the superconducting cobaltite Na(x)CoO(2)(.)yH(2)O as function of Na content and hydration (x approximate to 1/3, 3/4 and y approximate to 0, 2/3, 4/3). The observed scattering intensity is analysed in terms of lattice strain, structural misfit and disorder. Hydration, due to the intercalation of one or two H2O layers, releases a part of this strain. Our Raman data suggest a connection between disorder on the partly occupied Na sites and the narrow phase space of superconductivity.

引用

页码：S857 / S865

页数：9

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