1.
Phys Rev Lett
; 115(19): 196401, 2015 Nov 06.
Artículo
en Inglés
| MEDLINE
| ID: mdl-26588400
RESUMEN
The intrinsic field effect, the change in surface conductance with an applied transverse electric field, of prototypal strongly correlated VO(2) has remained elusive. Here we report its measurement enabled by epitaxial VO(2) and atomic layer deposited high-κ dielectrics. Oxygen migration, joule heating, and the linked field-induced phase transition are precluded. The field effect can be understood in terms of field-induced carriers with densities up to â¼5×10(13) cm(-2) which are trongly localized, as shown by their low, thermally activated mobility (â¼1×10(-3) cm(2)/V s at 300 K). These carriers show behavior consistent with that of Holstein polarons and strongly impact the (opto)electronics of VO(2).