Asymmetric Orbital-Lattice Interactions in Ultrathin Correlated Oxide Films

被引：148

作者：

Chakhalian, J. ^{[1
]}

Rondinelli, J. M. ^{[2
,3
]}

Liu, Jian ^{[1
,4
]}

Gray, B. A. ^{[1
]}

Kareev, M. ^{[1
]}

Moon, E. J. ^{[1
]}

Prasai, N. ^{[5
]}

Cohn, J. L. ^{[5
]}

Varela, M. ^{[6
]}

Tung, I. C. ^{[7
]}

Bedzyk, M. J. ^{[7
]}

Altendorf, S. G. ^{[8
]}

Strigari, F. ^{[8
]}

Dabrowski, B. ^{[9
]}

Tjeng, L. H. ^{[10
]}

Ryan, P. J. ^{[3
]}

Freeland, J. W. ^{[3
]}

机构：

[1] Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA

[2] Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA

[3] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

[5] Univ Miami, Dept Phys, Coral Gables, FL 33124 USA

[6] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[7] Northwestern Univ, Evanston, IL 60208 USA

[8] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[9] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA

[10] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 11期

基金：

美国国家科学基金会;

关键词：

METAL-INSULATOR-TRANSITION; RNIO3; R; PHASE; PEROVSKITES; ELECTRONICS; INTERFACE; CHARGE; PR; ND;

D O I：

10.1103/PhysRevLett.107.116805

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using resonant x-ray spectroscopies combined with density functional calculations, we find an asymmetric biaxial strain-induced d-orbital response in ultrathin films of the correlated metal LaNiO3 which are not accessible in the bulk. The sign of the misfit strain governs the stability of an octahedral "breathing" distortion, which, in turn, produces an emergent charge-ordered ground state with an altered ligand-hole density and bond covalency. Control of this new mechanism opens a pathway to rational orbital engineering, providing a platform for artificially designed Mott materials.

引用

页数：4

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