Spintronic and electrochromic device based on Li-intercalated transition-metal doped anatase $\rm TiO_2$

TL;DR

This study investigates how lithium intercalation influences the electronic and magnetic properties of transition-metal doped anatase TiO₂, proposing potential spintronic and electrochromic devices controlled by electric fields.

Contribution

It demonstrates the effects of Li intercalation on the electronic phases of TM-doped TiO₂ and proposes a novel device concept based on these properties.

Findings

Mn-doped TiO₂ becomes metallic upon Li intercalation.

Fe-doped TiO₂ transitions from insulator to metal with increased Li.

Potential for electric-field controlled spintronic and electrochromic devices.

Abstract

We have explored the effects of the Li intercalation on the electronic and magnetic properties of transition-metal (TM) doped anatase TiO$_2$. By Li intercalation, Mn-doped TiO$_2$ exhibits the insulator to metal transition. On the other hand, Li-intercalated Fe-doped TiO$_2$ has the insulating ground state for low concentration of Li/Ti=0.067, but the metallic ground state for high concentration of Li/Ti=0.133. We discuss the $n$-type carrier induced ferromagnetism in Li-intercalated TM-doped anatase TiO$_2$. Based on the Li-intercalated TM-doped anatase TiO$_2$, we propose a potential spintronic and electrochromic device controlled by the electric-field.