Role of in-plane and out-of-plane dilution in CeFeAsO: Charge doping versus disorder

被引：28

作者：

Prando, G. ^{[1
]}

Vakaliuk, O. ^{[1
]}

Sanna, S. ^{[3
]}

Lamura, G. ^{[2
,4
,5
]}

Shiroka, T. ^{[6
,7
]}

Bonfa, P. ^{[8
,9
]}

Carretta, P. ^{[2
,3
]}

De Renzi, R. ^{[8
,9
]}

Klauss, H. -H. ^{[10
]}

Blum, C. G. F. ^{[1
]}

Wurmehl, S. ^{[1
,10
]}

Hess, C. ^{[1
]}

Buechner, B. ^{[1
,10
]}

机构：

[1] Leibniz Inst Festkorper & Werkstoffforsch IFW, D-01171 Dresden, Germany

[2] Univ Pavia, Dipartimento Fis, I-27100 Pavia, Italy

[3] Univ Pavia, Unita CNISM Pavia, I-27100 Pavia, Italy

[4] CNR SPIN, I-16146 Genoa, Italy

[5] Univ Genoa, I-16146 Genoa, Italy

[6] ETH Honggerberg, Lab Festkorperphys, CH-8093 Zurich, Switzerland

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

[8] Univ Parma, Dipartimento Fis, I-43124 Parma, Italy

[9] Univ Parma, Unita CNISM Parma, I-43124 Parma, Italy

[10] Tech Univ Dresden, Inst Festkorperphys, D-01062 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 17期

关键词：

HIGH-TEMPERATURE SUPERCONDUCTIVITY; ELECTRONIC PHASE-DIAGRAM; IRON;

D O I：

10.1103/PhysRevB.87.174519

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We provide direct experimental evidence for the identical effect of the in-plane Fe1-xCox and of the out-of-plane O-1 F-x(x) chemical dilution on the itinerant spin-density-wave (SDW) magnetic phase in CeFeAsO. Remarkably, the suppression of SDW is not sensitive at all to the different kinds of disorder introduced in the two cases. Still, it is clearly shown that the sizable in-plane disorder induced by the Fe1-xCox substitution is highly effective in suppressing T-c. Differently from what is observed in CeFeAsO1-xFx, the ordered magnetic phase of the Ce sublattice is preserved throughout the whole phase diagram in CeFe1-xCoxAsO (x <= 0.2). An intriguing effect is encountered, whereby the magnetic coupling among Ce3+ ions is enhanced by the superconducting phase.

引用

页数：8

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