Large band offset as driving force of 2-dimensional electron confinement: the case of SrTiO$_3$/SrZrO$_3$ interface

P. Delugas; A. Filippetti; A. Gadaleta; I. Pallecchi D. Marré; V. Fiorentini

doi:10.1103/PhysRevB.88.115304

Large band offset as driving force of 2-dimensional electron confinement: the case of SrTiO$_3$/SrZrO$_3$ interface

Mesoscale and Nanoscale Physics 2013-09-20 v1 Materials Science

Authors: P. Delugas , A. Filippetti , A. Gadaleta , I. Pallecchi D. Marré , V. Fiorentini

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Abstract

Using advanced first-principles calculations we predict that the non-polar SrTiO $_3$ /SrZrO $_3$ (001) interface, designed as either thin SrZrO $_3$ film deposited on SrTiO $_3$ or short-period (SrTiO $_3$ ) $_m$ /(SrZrO $_3$ ) $_n$ superlattice, host a 2-dimensionally confined electron gas. Mobile electron charge due to native impurities, field-effect, or modulation doping remains tightly trapped at the interface. Key ingredients for this occurrence are a) the peculiar chemistry of 3d orbitals, b) the large band offset at titanate-zirconate interface.

Keywords

band offset electron confinement SrTiO3/SrZrO3 interface superlattices first-principles calculations 2D electron gas titanate-zirconate

Cite

@article{arxiv.1309.4965,
  title  = {Large band offset as driving force of 2-dimensional electron confinement: the case of SrTiO$_3$/SrZrO$_3$ interface},
  author = {P. Delugas and A. Filippetti and A. Gadaleta and I. Pallecchi D. Marré and V. Fiorentini},
  journal= {arXiv preprint arXiv:1309.4965},
  year   = {2013}
}

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7 pages, 5 figures

Large band offset as driving force of 2-dimensional electron confinement: the case of SrTiO$_3$/SrZrO$_3$ interface

Abstract

Keywords

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