Spinpolarized twodimensional electron/hole gases on LiCoO_2 layers.
Abstract
Firstprinciples 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 of LiCoO$_2$ in remarkable contrast with the bulk band structure stabilized by Li donating its electron to the CoO$_2$ layer forming a Co$dt_{2g}^6$ insulator. By mapping the firstprinciples computational results to a minimal tightbinding models corresponding to a nonchiral 3D generalization of the quadripartite SuSchrieferHeeger (SSH4) model, we show that these surface states have topological origin.
 Publication:

SciPost Physics
 Pub Date:
 March 2021
 DOI:
 10.21468/SciPostPhys.10.3.057
 arXiv:
 arXiv:2003.00061
 Bibcode:
 2021ScPP...10...57R
 Keywords:

 Condensed Matter  Strongly Correlated Electrons;
 Condensed Matter  Mesoscale and Nanoscale Physics;
 Condensed Matter  Materials Science;
 Condensed Matter  Other Condensed Matter