Controlling interfacial states in amorphous/crystalline LaAlO₃/SrTiO₃ heterostructures by electric fields

TY - JOUR

T1 - Controlling interfacial states in amorphous/crystalline LaAlO3/SrTiO3 heterostructures by electric fields

AU - Christensen, D. V.

AU - Trier, F.

AU - Chen, Y. Z.

AU - Smith, A.

AU - Nygård, Jesper

AU - Pryds, Nini

PY - 2013/1/14

Y1 - 2013/1/14

N2 - The tunable metal-insulator transition in crystalline LaAlO 3/SrTiO3 heterostructures constitutes a central element in the range of remarkable interface properties that has made this oxide system subject to extensive research. Recently, metallic interfaces have also been realized when depositing amorphous LaAlO3 films on SrTiO3. Here, we present a non-volatile and reversible tuning of the interface conductivity by more than 3 orders of magnitude at room temperature by applying an electric field to such amorphous/crystalline heterostructures with amorphous LaAlO3 film thicknesses of ∼2 nm. We show that the tunability is strongly temperature dependent, and demonstrate a simple protocol for enhancing the tunability.

AB - The tunable metal-insulator transition in crystalline LaAlO 3/SrTiO3 heterostructures constitutes a central element in the range of remarkable interface properties that has made this oxide system subject to extensive research. Recently, metallic interfaces have also been realized when depositing amorphous LaAlO3 films on SrTiO3. Here, we present a non-volatile and reversible tuning of the interface conductivity by more than 3 orders of magnitude at room temperature by applying an electric field to such amorphous/crystalline heterostructures with amorphous LaAlO3 film thicknesses of ∼2 nm. We show that the tunability is strongly temperature dependent, and demonstrate a simple protocol for enhancing the tunability.

U2 - 10.1063/1.4775669

DO - 10.1063/1.4775669

M3 - Journal article

SN - 0003-6951

VL - 102

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 2

M1 - 021602

ER -