Spin-polarized two-dimensional electron/hole gases on LiCoO$_2$ layers.
Santosh Kumar Radha, Walter R. L. Lambrecht
SciPost Phys. 10, 057 (2021) · published 8 March 2021
- doi: 10.21468/SciPostPhys.10.3.057
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Abstract
First-principles calculations show the formation of a 2D spin polarized electron (hole) gas on the Li (CoO$_2$) terminated surfaces of finite slabs down to a monolayer, in remarkable contrast with the bulk band structure, which is stabilized by Li donating its electron to the CoO$_2$ layer forming a Co-$d-t_{2g}^6$ insulator. By mapping the first-principles computational results to a minimal tight-binding models corresponding to a non-chiral 3D generalization of the quadripartite Su-Schrieffer-Heeger (SSH4) model and symmetry analysis, we show that these surface states have topological origin.
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Authors / Affiliation: mappings to Contributors and Organizations
See all Organizations.- 1 Santosh Kumar Radha,
- Walter R. L. Lambrecht
Funder for the research work leading to this publication