Dimensionality Control of Electronic Phase Transitions in Nickel-Oxide Superlattices

被引：322

作者：

Boris, A. V. ^{[1
]}

Matiks, Y. ^{[1
]}

Benckiser, E. ^{[1
]}

Frano, A. ^{[1
]}

Popovich, P. ^{[1
]}

Hinkov, V. ^{[1
]}

Wochner, P. ^{[2
]}

Castro-Colin, M. ^{[2
]}

Detemple, E. ^{[2
]}

Malik, V. K. ^{[3
,4
]}

Bernhard, C. ^{[3
,4
]}

Prokscha, T. ^{[5
]}

Suter, A. ^{[5
]}

Salman, Z. ^{[5
]}

Morenzoni, E. ^{[5
]}

Cristiani, G. ^{[1
]}

Habermeier, H. -U. ^{[1
]}

Keimer, B. ^{[1
]}

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] Max Planck Inst Met Res, D-70569 Stuttgart, Germany

[3] Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland

[4] Fribourg Ctr Nano Mat, CH-1700 Fribourg, Switzerland

[5] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

来源：

SCIENCE | 2011年 / 332卷 / 6032期

基金：

瑞士国家科学基金会;

关键词：

METAL-INSULATOR-TRANSITION; ORDER;

D O I：

10.1126/science.1202647

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The competition between collective quantum phases in materials with strongly correlated electrons depends sensitively on the dimensionality of the electron system, which is difficult to control by standard solid-state chemistry. We have fabricated superlattices of the paramagnetic metal lanthanum nickelate (LaNiO(3)) and the wide-gap insulator lanthanum aluminate (LaAlO(3)) with atomically precise layer sequences. We used optical ellipsometry and low-energy muon spin rotation to show that superlattices with LaNiO(3) as thin as two unit cells undergo a sequence of collective metal-insulator and antiferromagnetic transitions as a function of decreasing temperature, whereas samples with thicker LaNiO(3) layers remain metallic and paramagnetic at all temperatures. Metal-oxide superlattices thus allow control of the dimensionality and collective phase behavior of correlated-electron systems.

引用

页码：937 / 940

页数：4

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