Microstrain sensitivity of orbital and electronic phase separation in SrCrO3

被引：73

作者：

Ortega-San-Martin, Luis ^{[1
,2
]}

Williams, Anthony J. ^{[1
,2
]}

Rodgers, Jennifer ^{[1
,2
]}

Attfield, J. Paul ^{[1
,2
]}

Heymann, Gunter ^{[3
]}

Huppertz, Hubert ^{[3
]}

机构：

[1] Univ Edinburgh, Ctr Sci Extreme Condit, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JZ, Midlothian, Scotland

[3] Univ Munich, Dept Chem, D-81377 Munich, Germany

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 25期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.99.255701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An orbital ordering transition and electronic phase coexistence have been discovered in SrCrO3. This cubic, orbitally-degenerate perovskite transforms to a tetragonal phase with partial orbital order. The tetragonal phase is antiferromagnetic below 35-40 K, whereas the cubic phase remains paramagnetic at low temperatures. The orbital ordering temperature (35-70 K) and coexistence of the two electronic phases are very sensitive to lattice strain. X-ray measurements show a preferential conversion of the most strained regions in the cubic phase. This reveals that small fluctuations in microstrain are sufficient to drive long range separation of competing electronic phases even in undoped cubic oxides.

引用

页数：4

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