Dimensionality-Driven Metal-Insulator Transition in Spin-Orbit-Coupled SrIrO_{3}.
Dimensionality-Driven Metal-Insulator Transition in Spin-Orbit-Coupled SrIrO_{3}.
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DOI：
10.1103/physrevlett.119.256404
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发表时间：
2017-06
影响因子：
8.6
通讯作者：
P. Schütz;D. D. Sante-D.;L. Dudy;J. Gabel;M. Stübinger;Martin Kamp;Yue-Wern Huang;Massimo Capone-
中科院分区：
文献类型：
--
作者：
P. Schütz;D. D. Sante-D.;L. Dudy;J. Gabel;M. Stübinger;Martin Kamp;Yue-Wern Huang;Massimo Capone-
当薄膜厚度减小时，我们在外延稳定、自旋轨道耦合的 SrIrO_{3} 超薄膜中观察到金属-绝缘体转变。通过将实验电子色散与不同复杂程度的密度泛函理论进行比较，我们确定了主要的微观机制，即维度引起的八面体旋转、磁性和电子相关性的重新调整。二维极限中的能带结构与块体 Sr_{2}IrO_{4} 的能带结构惊人的相似，通过电场选通的“干净”电子掺杂开辟了非常规超导的新途径。
Upon reduction of the film thickness we observe a metal-insulator transition in epitaxially stabilized, spin-orbit-coupled SrIrO_{3} ultrathin films. By comparison of the experimental electronic dispersions with density functional theory at various levels of complexity we identify the leading microscopic mechanisms, i.e., a dimensionality-induced readjustment of octahedral rotations, magnetism, and electronic correlations. The astonishing resemblance of the band structure in the two-dimensional limit to that of bulk Sr_{2}IrO_{4} opens new avenues to unconventional superconductivity by "clean" electron doping through electric field gating.