带隙8-Pmmn硼烯超晶格中的自旋相关电导。

Spin-dependent conductance in gapped 8-Pmmn borophene-superlattice.

作者信息

Sattari Farhad, Mirershadi Soghra

机构信息

Department of Physics, Faculty of Sciences, University of Mohaghegh Ardabili, P.O. Box 179, Ardabil, Iran.

Nanoscience and Nanotechnology Research Group, University of Mohaghegh Ardabili, Ardabil, Iran.

出版信息

Sci Rep. 2025 Jul 21;15(1):26441. doi: 10.1038/s41598-025-12028-0.

DOI:10.1038/s41598-025-12028-0

PMID:40691254

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12279991/

Abstract

The energy gap effect on the spin conductance and polarization of spin and valley in the 8-Pmmn borophene superlattice under Rashba interaction is studied. We show that the spin conductance in a superlattice based on the 8-Pmmn borophene can be easily tuned by the strength of Rashba interaction and the superlattice direction. Also, the energy gap is an important quantity to adjust the conductance with and without spin rotation. By adjusting the energy gap, electrons with a certain spin can be filtered. In addition, when the energy gap is greater than a threshold value, the conductance becomes zero for both electrons with and without spin flip. By adjusting the energy gap, superlattice direction, and Rashba strength the value and sign of polarization of spin and valley can be easily controlled.

摘要

研究了在Rashba相互作用下8-Pmmn硼烯超晶格中能隙对自旋电导以及自旋和谷极化的影响。我们表明，基于8-Pmmn硼烯的超晶格中的自旋电导可以通过Rashba相互作用的强度和超晶格方向轻松调节。此外，能隙是调节有无自旋旋转时电导的一个重要量。通过调节能隙，可以过滤具有特定自旋的电子。此外，当能隙大于阈值时，对于有自旋翻转和无自旋翻转的电子，电导都变为零。通过调节能隙、超晶格方向和Rashba强度，可以轻松控制自旋和谷极化的大小和符号。