Topological Insulator States and Spin-Orbit Transport anomalies in Functionalized Antimonene Monolayers

International Journal of Physics | Vol. 11, No. 12, December 2020 | pp. 89–96

DOI: 10.46882/2020/IJP/000128

Research Article

Title: Topological Insulator States and Spin-Orbit Transport anomalies in Functionalized Antimonene Monolayers

Names of Authors: J. W. Park¹, E. C. Vance²

Authors’ Affiliations:
¹ Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, South Korea
² Department of Physics, University of California, Berkeley, California, USA

Abstract: Developing novel two-dimensional atomic frameworks that house large electronic energy gaps is a focal research directive for realizing ambient-temperature spintronic devices and dissipationless circuitry networks. This study evaluates topological insulator states and maps spin-orbit transport anomalies inside functionalized antimonene (Sb) monolayers. We performed relativistic tight-binding electronic structure modeling across the hexagonal Brillouin zone, incorporating local chemical decoration patterns. The calculations show that strong intrinsic spin-orbit coupling cross-links the valence and conduction bands, lifting state degeneracies at the high-symmetry boundaries to establish a wide topological bulk bandgap of 0.28 eV. The system reports a non-zero spin Chern number of Cs = +1, confirming strong quantum spin Hall configurations. We simulated spin-polarized electron wavepacket transport properties past single-atom missing vacancies and edge boundary roughness. The helical edge modes bypassed these structural disruptions with an absolute transmission efficiency calculation of 99.5% ± 0.2%, showing an complete suppression of backscattering losses protected by time-reversal symmetry guidelines.

Keywords: Antimonene; topological insulators; spin-orbit coupling; quantum spin Hall effect; edge states; spintronics

Manuscript Timeline: Received: August 18, 2020; Revised: October 10, 2020; Accepted: November 02, 2020; Published: December 15, 2020

Citation: Park, J. W., & Vance, E. C. (2020). Topological Insulator States and Spin-Orbit Transport anomalies in Functionalized Antimonene Monolayers. International Journal of Physics, 11(12), 89–96.

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