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Mesoscopic Free Path of Nonthermalized Photogenerated Carriers in a Ferroelectric Insulator
Journal article   Open access   Peer reviewed

Mesoscopic Free Path of Nonthermalized Photogenerated Carriers in a Ferroelectric Insulator

Zongquan Gu, Dominic Imbrenda, Andrew L. Bennett-Jackson, Matthias Falmbigl, Adrian Podpirka, Thomas C. Parker, Daniel Shreiber, Mathew P. Ivill, Vladimir M. Fridkin and Jonathan E. Spanier
Physical review letters, v 118(9), pp 096601-096601
01 Mar 2017
PMID: 28306282
url
https://link.aps.org/accepted/10.1103/PhysRevLett.118.096601View
Accepted (AM)Open Access (Publisher-Specific) Open

Abstract

Physical Sciences Physics Physics, Multidisciplinary Science & Technology
We show how finite-size scaling of a bulk photovoltaic effect-generated electric field in epitaxial ferroelectric insulating BaTiO3(001)films and a photo-Hall response involving the bulk photovoltaic current reveal a large room-temperature mean free path of photogenerated nonthermalized electrons. Experimental determination of mesoscopic ballistic optically generated carrier transport opens a new paradigm for hot electron-based solar energy conversion, and for facile control of ballistic transport distinct from existing low-dimensional semiconductor interfaces, surfaces, layers, or other structures.

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Physics, Multidisciplinary
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