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

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

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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.

Original language	English
Article number	1274
Number of pages	5
Journal	Scientific Reports
Volume	3
Issue number	11
DOIs	https://doi.org/10.1038/srep01274
Publication status	Published - 14-Feb-2013

Keywords

EMISSION MICROSCOPY
ROOM-TEMPERATURE
INTERFACES
SCATTERING

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title = "Hot electron transport in a strongly correlated transition-metal oxide",

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.",

keywords = "EMISSION MICROSCOPY, ROOM-TEMPERATURE, INTERFACES, SCATTERING",

author = "Rana, {Kumari Gaurav} and Takeaki Yajima and Subir Parui and Kemper, {Alexander F.} and Devereaux, {Thomas P.} and Yasuyuki Hikita and Hwang, {Harold Y.} and Tamalika Banerjee",

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doi = "10.1038/srep01274",

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T1 - Hot electron transport in a strongly correlated transition-metal oxide

AU - Rana, Kumari Gaurav

AU - Yajima, Takeaki

AU - Parui, Subir

AU - Kemper, Alexander F.

AU - Devereaux, Thomas P.

AU - Hikita, Yasuyuki

AU - Hwang, Harold Y.

AU - Banerjee, Tamalika

PY - 2013/2/14

Y1 - 2013/2/14

N2 - 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.

AB - 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.

KW - EMISSION MICROSCOPY

KW - ROOM-TEMPERATURE

KW - INTERFACES

KW - SCATTERING

U2 - 10.1038/srep01274

DO - 10.1038/srep01274

M3 - Article

SN - 2045-2322

VL - 3

JO - Scientific Reports

JF - Scientific Reports

IS - 11

M1 - 1274

ER -

Hot electron transport in a strongly correlated transition-metal oxide

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