Unidirectional spin density wave state in metallic (Sr1-xLax)2IrO4

被引：38

作者：

Chen, Xiang ^{[1
,2
]}

Schmehr, Julian L. ^{[2
]}

Islam, Zahirul ^{[3
]}

Porter, Zach ^{[4
]}

Zoghlin, Eli ^{[2
]}

Finkelstein, Kenneth ^{[5
]}

Ruff, Jacob P. C. ^{[5
]}

Wilson, Stephen D. ^{[2
]}

机构：

[1] Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA

[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

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

[4] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[5] Cornell Univ, Cornell High Energy Synchrotron Source, Ithaca, NY 14853 USA

来源：

NATURE COMMUNICATIONS | 2018年 / 9卷

基金：

美国国家科学基金会; 美国国家卫生研究院;

关键词：

MAGNETIC CORRELATIONS; PHASE;

D O I：

10.1038/s41467-017-02647-1

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：

Materials that exhibit both strong spin-orbit coupling and electron correlation effects are predicted to host numerous new electronic states. One prominent example is the J(eff) = 1/2 Mott state in Sr2IrO4, where introducing carriers is predicted to manifest high temperature superconductivity analogous to the S = 1/2 Mott state of La2CuO4. While bulk super-conductivity currently remains elusive, anomalous quasiparticle behaviors paralleling those in the cuprates such as pseudogap formation and the formation of a d-wave gap are observed upon electron-doping Sr2IrO4. Here we establish a magnetic parallel between electron-doped Sr2IrO4 and hole-doped La2CuO4 by unveiling a spin density wave state in electron-doped Sr2IrO4. Our magnetic resonant X-ray scattering data reveal the presence of an incommensurate magnetic state reminiscent of the diagonal spin density wave state observed in the monolayer cuprate (La1-xSrx)(2)CuO4. This link supports the conjecture that the quenched Mott phases in electron-doped Sr2IrO4 and hole-doped La2CuO4 support common competing electronic phases.

引用

页数：7

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