Accession Number : ADA622929


Title :   Novel Quantum Phases at Interfaces


Descriptive Note : Final rept. 16 Sep 2009-15 Sep 2014


Corporate Author : TEXAS UNIV AT AUSTIN


Personal Author(s) : Fiete, Gregory A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a622929.pdf


Report Date : 12 Dec 2014


Pagination or Media Count : 43


Abstract : In this project we studied topological phases at transition metal oxide interfaces. Over the course of the 5-year project, a fairly detailed understanding of these systems was acquired. By using a combination of model Hamiltonian studies and first-principles calculations, we made a number of predictions for specific material systems that might exhibit topological phases, with the most promising candidate being the zero magnetic field quantum Hall state known as a Chern insulator or quantum anomalous Hall state. [111] grown thin films of LaNiO3 and Y2Ir2O7 may support this phase under the right conditions (which appear to be close to current experimental conditions). The main technological advantage of this topological phase is that its one-dimensional edge state allows for dissipationless current flow, and can be used for low-power electronics, potentially at room temperature (which a superconductor cannot do).


Descriptors :   *NETWORK TOPOLOGY , *QUANTUM EFFICIENCY , ANOMALIES , CORRELATION , COUPLING(INTERACTION) , EPITAXIAL GROWTH , HALL EFFECT , HAMILTONIAN FUNCTIONS , INSULATION , INTERFACES , LATTICE DYNAMICS , LOW POWER , METAL COMPOUNDS , MOLECULAR BEAM EPITAXY , ONE DIMENSIONAL FLOW , OXIDES , PHASE TRANSFORMATIONS , QUANTUM THEORY , ROOM TEMPERATURE , THIN FILMS


Subject Categories : Electrical and Electronic Equipment
      Quantum Theory and Relativity
      Solid State Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE