Letter pubs.acs.org/NanoLett
Anomalous High Mobility in LaAlO3/SrTiO3 Nanowires Patrick Irvin,† Joshua P. Veazey,† Guanglei Cheng,† Shicheng Lu,† Chung-Wung Bark,‡ Sangwoo Ryu,‡ Chang-Beom Eom,‡ and Jeremy Levy*,† †
Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
‡
ABSTRACT: Nanoscale control of the metal−insulator transition at the interface between LaAlO3 and SrTiO3 provides a pathway for reconfigurable, oxide-based nanoelectronics. Four-terminal transport measurements of LaAlO3/SrTiO3 nanowires at room temperature (T = 300 K) reveal an equivalent 2D Hall mobility greatly surpassing that of bulk SrTiO3 and approaching that of n-type Si nanowires of comparable dimensions. This large enhancement of mobility is relevant for roomtemperature device applications.
KEYWORDS: LaAlO3/SrTiO3, 2DEG, mobility, nanowire
T
mobility of the n-type LaAlO3/SrTiO3 interface at room temperature is identical to that of bulk n-type SrTiO3. The LaAlO3/SrTiO3 interface can be reversibly controlled with high precision (
