TY - JOUR
T1 - Exchange-enhanced spin-orbit splitting and its density dependence for electrons in monolayer transition metal dichalcogenides
AU - Rozhanskiy, Igor
AU - Falko, Vladimir
PY - 2024/10/16
Y1 - 2024/10/16
N2 - We show that spin-orbit splitting (SOS) in monolayers of semiconducting transition metal dichalcogenides (TMDs) is substantially enhanced by electron-electron interaction. This effect, similar to the exchange-enhancement of the electron g-factor, is most pronounced for conduction band electrons (in particular, in MoS2), and it has a non-monotonic dependence on the carrier sheet density, n. That is, the SOS enhancement is peaked at the onset of filling of the higher-energy spin-split band by electrons, 𝑛*, which also separates the regimes of slow (at 𝑛𝑛*) spin and valley relaxation of charge carriers. Moreover, this density itself is determined by the enhanced SOS value, making the account of exchange renormalisation important for the analysis of spintronic performance of field-effect transistors based on two-dimensional TMDs.
AB - We show that spin-orbit splitting (SOS) in monolayers of semiconducting transition metal dichalcogenides (TMDs) is substantially enhanced by electron-electron interaction. This effect, similar to the exchange-enhancement of the electron g-factor, is most pronounced for conduction band electrons (in particular, in MoS2), and it has a non-monotonic dependence on the carrier sheet density, n. That is, the SOS enhancement is peaked at the onset of filling of the higher-energy spin-split band by electrons, 𝑛*, which also separates the regimes of slow (at 𝑛𝑛*) spin and valley relaxation of charge carriers. Moreover, this density itself is determined by the enhanced SOS value, making the account of exchange renormalisation important for the analysis of spintronic performance of field-effect transistors based on two-dimensional TMDs.
U2 - 10.1103/physrevb.110.l161404
DO - 10.1103/physrevb.110.l161404
M3 - Article
SN - 2469-9969
VL - 110
JO - Physical Review B
JF - Physical Review B
M1 - L161404
ER -