Hot electron transport in a strongly correlated transition-metal oxide

Kumari Gaurav Rana; Takeaki Yajima; Subir Parui; Alexander F Kemper; Thomas P Devereaux; Yasuyuki Hikita; Harold Y Hwang; Tamalika Banerjee

doi:10.1038/srep01274

Hot electron transport in a strongly correlated transition-metal oxide

Sci Rep. 2013:3:1274. doi: 10.1038/srep01274.

Authors

Kumari Gaurav Rana¹, Takeaki Yajima, Subir Parui, Alexander F Kemper, Thomas P Devereaux, Yasuyuki Hikita, Harold Y Hwang, Tamalika Banerjee

Affiliation

¹ Physics of Nanodevices, Zernike Institute for Advanced Materials, University of Groningen, The Netherlands.

Abstract

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.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.