Engineering One-Dimensional Quantum Stripes from Superlattices of   Two-Dimensional Layered Materials
  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. 
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. C...
cond-mat.mtrl-sci cond-mat.other cond-mat.str-el cond-mat.supr-con