High-pressure structure and electronic transport in hole-doped La3/4Ca1/4MnO3 perovskites -: art. no. 012111

被引：57

作者：

Meneghini, C

Levy, D

Mobilio, S

Ortolani, M

Nuñez-Reguero, M

Kumar, A

Sarma, DD

机构：

[1] European Synchrotron Radiat Facil, GILDA, INFM, F-38043 Grenoble, France

[2] Univ Roma Tre, Dipartimento Fis E Amaldi, I-00146 Rome, Italy

[3] Univ Turin, Dipartimento Sci Mineral & Petrol, I-0125 Turin, Italy

[4] INFM, Lab Nazl Frascati, I-00044 Frascati, Italy

[5] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy

[6] CNRS, Ctr Rech Tres Basses Temp, F-38042 Grenoble, France

[7] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 01期

关键词：

D O I：

10.1103/PhysRevB.65.012111

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structure and electronic transport properties of hole-doped La(3/4)Cat(1/4)MnO(3) perovskite have been investigated as a function of pressure up to about 15 GPa. Though the applied pressure enhances the electrical conductivity, the high-pressure resistivity data point out a competing mechanism interfering with the pressure-induced charge delocalization that prevent the system from reaching a fully metallic state around room temperature. X-ray diffraction results reveal unexpected structural modifications with increasing pressure that can be interpreted with changes in the coherence length of the Jahn-Teller distortions.

引用

页码：1 / 4

页数：4

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