Possible quantum critical point in La2/3Ca1/3Mn1-xGaxO3 -: art. no. 207205

被引：38

作者：

De Teresa, JM ^{[1
]}

Algarabel, PA

Ritter, C

Blasco, J

Ibarra, MR

Morellon, L

Espeso, JI

Gómez-Sal, JC

机构：

[1] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, Zaragoza, Spain

[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

[3] Univ Zaragoza, Inst Nanociencia Aragon, Zaragoza, Spain

[4] Univ Cantabria, Dept CITIMAC, E-39005 Santander, Spain

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.94.207205

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the magnetic ground state in La2/3Ca1/3Mn1-xGaxO3 manganites, where a quantum critical point (QCP) has been theoretically predicted. The metallic ferromagnetic ground state for low Ga doping breaks down for x >= 0.11, an insulating state being established at low temperatures. Long-range ferromagnetism coexists with short-range magnetic correlations in the concentration range 0.11 <= x <= 0.145 while only the short-range correlations survive for x >= 0.16. We discuss the implications of such a QCP to the physics of manganites and compare to other QCP systems.

引用

页数：4

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