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arXiv · 1610.07648

Engineering One-Dimensional Quantum Stripes from Superlattices of Two-Dimensional Layered Materials

J. H. Gruenewald·J. Kim·H. S. Kim·J. M. Johnson·J. Hwang·M. Souri·J. Terzic·S. H. Chang·A. Said·J. W. Brill·G. Cao·H. -Y. Kee·S. S. A. Seo
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Abstract

One-dimensional (1D) quantum systems, which are predicted to exhibit novel states of matter in theory, have been elusive in experiment. Here we report a superlattice method of creating artificial 1D quantum stripes, which offers dimensional tunability from two- to one-dimensions. As a model system, we have fabricated 1D iridium (Ir) stripes using a-axis oriented superlattices of a relativistic Mott insulator Sr2IrO4 and a wide bandgap insulator LaSrGaO4, both of which are crystals with layered structure. In addition to the successful formation of 1D Ir-stripe structure, we have observed 1D quantum-confined electronic states from optical spectroscopy and resonant inelastic x-ray scattering. Since this 1D superlattice approach can be applied to a wide range of layered materials, it opens a new era of 1D science.

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J. H. Gruenewald, J. Kim, H. S. Kim, J. M. Johnson, J. Hwang, M. Souri, J. Terzic, S. H. Chang, A. Said, J. W. Brill, G. Cao, H. -Y. Kee, S. S. A. Seo. 2016-10-24. Engineering One-Dimensional Quantum Stripes from Superlattices of Two-Dimensional Layered Materials. https://doi.org/10.1002/adma.201603798

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