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      Topological semimetal and Fermi-arc surface states in the electronic structure of pyrochlore iridates

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          The birth of topological insulators.

          Joel Moore (2010)
          Certain insulators have exotic metallic states on their surfaces. These states are formed by topological effects that also render the electrons travelling on such surfaces insensitive to scattering by impurities. Such topological insulators may provide new routes to generating novel phases and particles, possibly finding uses in technological applications in spintronics and quantum computing.
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            First-principles calculations of the electronic structure and spectra of strongly correlated systems: theLDA+Umethod

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              Phase-sensitive observation of a spin-orbital Mott state in Sr2IrO4.

              Measurement of the quantum-mechanical phase in quantum matter provides the most direct manifestation of the underlying abstract physics. We used resonant x-ray scattering to probe the relative phases of constituent atomic orbitals in an electronic wave function, which uncovers the unconventional Mott insulating state induced by relativistic spin-orbit coupling in the layered 5d transition metal oxide Sr2IrO4. A selection rule based on intra-atomic interference effects establishes a complex spin-orbital state represented by an effective total angular momentum = 1/2 quantum number, the phase of which can lead to a quantum topological state of matter.
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                Author and article information

                Journal
                PRBMDO
                Physical Review B
                Phys. Rev. B
                American Physical Society (APS)
                1098-0121
                1550-235X
                May 2011
                May 2 2011
                : 83
                : 20
                Article
                10.1103/PhysRevB.83.205101
                932ae916-d08c-4bd3-9703-3c3e5246795c
                © 2011

                http://link.aps.org/licenses/aps-default-license

                http://link.aps.org/licenses/aps-default-accepted-manuscript-license

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