Oxide heterointerfaces are ideal for investigating strong correlation effects to electron transport, relevant for oxide-electronics. Using hot-electrons, we probe electron transport perpendicular to the La0.7Sr0.3MnO3 (LSMO)- Nb-doped SrTiO3 (Nb:STO) interface and find the characteristic hot-electron attenuation length in LSMO to be 1.48 ± 0.10 unit cells (u.c.) at -1.9 V, increasing to 2.02 ± 0.16 u.c. at -1.3 V at room temperature. Theoretical analysis of this energy dispersion reveals the dominance of electron-electron and polaron scattering. Direct visualization of the local electron transport shows different transmission at the terraces and at the step-edges.
@article{arxiv.1302.4177,
title = {Hot electron transport in a strongly correlated transition metal oxide},
author = {Kumari Gaurav Rana and Takeaki Yajima and Subir Parui and Alexander F. Kemper and Thomas P. Devereaux and Yasuyuki Hikita and Harold Y. Hwang and Tamalika Banerjee},
journal= {arXiv preprint arXiv:1302.4177},
year = {2013}
}