Počet záznamů: 1  

Strain-induced nonsymmorphic symmetry breaking and removal of Dirac semimetallic nodal line in an orthoperovskite iridate

  1. 1.
    0471257 - FZÚ 2017 RIV US eng J - Článek v odborném periodiku
    Liu, J. - Kriegner, D. - Horák, L. - Puggioni, D. - Serrao, C.R. - Chen, R. - Yi, D. - Frontera, C. - Holy, V. - Vishwanath, A. - Rondinelli, J.M. - Martí, Xavier - Ramesh, R.
    Strain-induced nonsymmorphic symmetry breaking and removal of Dirac semimetallic nodal line in an orthoperovskite iridate.
    Physical Review B. Roč. 93, č. 8 (2016), s. 1-7, č. článku 085118. ISSN 2469-9950. E-ISSN 2469-9969
    Grant CEP: GA ČR GB14-37427G
    Klíčová slova: topological insulators * metal * transition * SrIrO3
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 3.836, rok: 2016

    Using a combination of heteroepitaxial growth, structure refinement based on synchrotron x-ray diffraction, and first-principles calculations, we show that the symmetry-protected Dirac line nodes in the topological semimetallic perovskite SrIrO3 can be lifted simply by applying epitaxial constraints. In particular, the Dirac gap opens without breaking the Pbnm mirror symmetry. In virtue of a symmetry-breaking analysis, we demonstrate that the original symmetry protection is related to the n-glide operation, which can be selectively broken by different heteroepitaxial structures. This symmetry protection renders the nodal line a nonsymmorphic Dirac semimetallic state. The results highlight the vital role of crystal symmetry in spin-orbit-coupled correlated oxides and provide a foundation for experimental realization of topological insulators in iridate-based heterostructures.
    Trvalý link: http://hdl.handle.net/11104/0268652

     
     
Počet záznamů: 1  

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