Electronic characteristics of ultrathin SrRuO${}_3$ films and their relationship with the metal$-$insulator transition

Subeen Pang, Yoonkoo Kim, Yeong Jae Shin +4

SrRuO${}_3$ (SRO) films are known to exhibit insulating behavior as their thickness approaches four unit cells. We employ electron energy$-$loss (EEL) spectroscopy to probe the spati…