Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-12-12
Physics
Condensed Matter
Strongly Correlated Electrons
3 pages, 3 Postscript figures, submitted to Appl.Phys.Lett
Scientific paper
10.1063/1.1703841
An n-channel accumulation-type field effect transistor (FET) has been fabricated utilizing a KTaO3 single crystal as an active element and a sputtered amorphous Al2O3 film as a gate insulator. The device demonstrated an ON/OFF ratio of 10^4 and a field effect mobility of 0.4cm^2/Vs at room temperature, both of which are much better than those of the SrTiO3 FETs reported previously. The field effect mobility was almost temperature independent down to 200K. Our results indicate that the Al2O3 / KTaO3 interface is worthy of further investigations as an alternative system of future oxide electronics.
Akoh H.
Inoue Isao H.
Takagi Hidekazu
Tokura Yasuhiro
Ueno Kimio
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