Indian Journal of Pure and Applied Physics

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Pressure Induced Surface States and Wannier Charge Centers in Ytterbium Monoarsenide


Affiliations
1 Department of Applied Physics, Delhi Technological University, New Delhi, Delhi 110 042, India
 

We demonstrate that the XMR material ytterbium monoarsenide (YbAs) shows transitions from a trivial to a non-trivial topological phase with hydrostatic pressure of 20 GPa and maintains its topological character up to structural phase transition pressure. We observed band inversions close to the Fermi level at the X high symmetry point at 20 GPa and band parities are used to confirm the same with consideration of Spin-orbit coupling (SOC) effect. The evolution of the surface states and the bulk band structure in YbAs are discussed.

Keywords

Ytterbium monoarsenide; Topological phase; Fermi level; Spin-orbit coupling.
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  • Pressure Induced Surface States and Wannier Charge Centers in Ytterbium Monoarsenide

Abstract Views: 92  |  PDF Views: 47

Authors

Ramesh Kumar
Department of Applied Physics, Delhi Technological University, New Delhi, Delhi 110 042, India
Rajesh Kumar
Department of Applied Physics, Delhi Technological University, New Delhi, Delhi 110 042, India
Sangeeta
Department of Applied Physics, Delhi Technological University, New Delhi, Delhi 110 042, India
Mukhtiyar Singh
Department of Applied Physics, Delhi Technological University, New Delhi, Delhi 110 042, India

Abstract


We demonstrate that the XMR material ytterbium monoarsenide (YbAs) shows transitions from a trivial to a non-trivial topological phase with hydrostatic pressure of 20 GPa and maintains its topological character up to structural phase transition pressure. We observed band inversions close to the Fermi level at the X high symmetry point at 20 GPa and band parities are used to confirm the same with consideration of Spin-orbit coupling (SOC) effect. The evolution of the surface states and the bulk band structure in YbAs are discussed.

Keywords


Ytterbium monoarsenide; Topological phase; Fermi level; Spin-orbit coupling.

References