### Skapa referens, olika format (klipp och klistra)

**Harvard**

Peelaers, H., Krishnaswamy, K., Gordon, L., Steiauf, D., Sarwe, A., Janotti, A. och Van de Walle, C. (2015) *Impact of electric-field dependent dielectric constants on two-dimensional electron gases in complex oxides*.

** BibTeX **

@article{

Peelaers2015,

author={Peelaers, H. and Krishnaswamy, K. and Gordon, L. and Steiauf, D. and Sarwe, Anna and Janotti, A. and Van de Walle, C. G.},

title={Impact of electric-field dependent dielectric constants on two-dimensional electron gases in complex oxides},

journal={Applied Physics Letters},

issn={0003-6951},

volume={107},

issue={18},

pages={4},

abstract={High-density two-dimensional electron gas (2DEG) can be formed at complex oxide interfaces such as SrTiO3/GdTiO3 and SrTiO3/LaAlO3. The electric field in the vicinity of the interface depends on the dielectric properties of the material as well as on the electron distribution. However, it is known that electric fields can strongly modify the dielectric constant of SrTiO3 as well as other complex oxides. Solving the electrostatic problem thus requires a self-consistent approach in which the dielectric constant varies according to the local magnitude of the field. We have implemented the field dependence of the dielectric constant in a Schrodinger-Poisson solver in order to study its effect on the electron distribution in a 2DEG. Using the SrTiO3/GdTiO3 interface as an example, we demonstrate that including the field dependence results in the 2DEG being confined closer to the interface compared to assuming a single field-independent value for the dielectric constant. Our conclusions also apply to SrTiO3/LaAlO3 as well as other similar interfaces.},

year={2015},

}

** RefWorks **

RT Journal Article

SR Electronic

ID 230015

A1 Peelaers, H.

A1 Krishnaswamy, K.

A1 Gordon, L.

A1 Steiauf, D.

A1 Sarwe, Anna

A1 Janotti, A.

A1 Van de Walle, C. G.

T1 Impact of electric-field dependent dielectric constants on two-dimensional electron gases in complex oxides

YR 2015

JF Applied Physics Letters

SN 0003-6951

VO 107

IS 18

AB High-density two-dimensional electron gas (2DEG) can be formed at complex oxide interfaces such as SrTiO3/GdTiO3 and SrTiO3/LaAlO3. The electric field in the vicinity of the interface depends on the dielectric properties of the material as well as on the electron distribution. However, it is known that electric fields can strongly modify the dielectric constant of SrTiO3 as well as other complex oxides. Solving the electrostatic problem thus requires a self-consistent approach in which the dielectric constant varies according to the local magnitude of the field. We have implemented the field dependence of the dielectric constant in a Schrodinger-Poisson solver in order to study its effect on the electron distribution in a 2DEG. Using the SrTiO3/GdTiO3 interface as an example, we demonstrate that including the field dependence results in the 2DEG being confined closer to the interface compared to assuming a single field-independent value for the dielectric constant. Our conclusions also apply to SrTiO3/LaAlO3 as well as other similar interfaces.

LA eng

DO 10.1063/1.4935222

LK http://dx.doi.org/10.1063/1.4935222

LK http://publications.lib.chalmers.se/records/fulltext/230015/local_230015.pdf

OL 30