Journal ArticleDOI
Wedge-shaped potential and Airy-function electron localization in oxide superlattices.
Zoran S. Popović,Sashi Satpathy +1 more
TLDR
Density-functional studies of the recently fabricated, lattice-matched perovskite titanates (SrTiO3)n/(LaTiO 3)m reveal a classic wedge-shaped potential well for the monolayer structure, originating from the Coulomb potential of a two-dimensional charged La sheet.Abstract:
Oxide superlattices and microstructures hold the promise for creating a new class of devices with unprecedented functionalities. Density-functional studies of the recently fabricated, lattice-matched perovskite titanates (SrTiO3)n/(LaTiO3)m reveal a classic wedge-shaped potential well for the monolayer (m = 1) structure, originating from the Coulomb potential of a two-dimensional charged La sheet. The potential in turn confines the electrons in the Airy-function-localized states. Magnetism is suppressed for the monolayer structure, while in structures with a thicker LaTiO3 part, bulk antiferromagnetism is recovered, with a narrow transition region separating the magnetic LaTiO3 and the nonmagnetic SrTiO3.read more
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Journal ArticleDOI
Oxide Interfaces—An Opportunity for Electronics
TL;DR: The state of the art of this emerging field of electronics is traced and some of the challenges and pitfalls that may lie ahead are discussed.
Journal ArticleDOI
Theory of nonequilibrium intrinsic spin torque in a single nanomagnet
Aurelien Manchon,Shufeng Zhang +1 more
TL;DR: In this article, the authors show that the spin torque can be effectively used to switch the direction of the magnetization and the critical switching current density could be as low as ${10}^{4}--{10}€6}\text{ }\text{A}/{\text{cm}}^{2}$ for a number of magnetic systems.
Journal ArticleDOI
Thermo-mechanical behavior of low-dimensional systems: The local bond average approach
TL;DR: Local bond average (LBA) as mentioned in this paper has been proposed to compare the measurable quantities of a specimen to the identities of its representative bonds and the energetic responses of these bonds (bond nature, order, length and strength) to external stimuli, such as changes in temperatures and coordination environments.
Journal ArticleDOI
Two-Dimensional Electron Gases at Oxide Interfaces
TL;DR: In this article, the status and prospects of oxide 2DEGs are reviewed and a review of the current state of the art can be found in Section 2.1.1].
Journal ArticleDOI
Electrostatic carrier doping of GdTiO3/SrTiO3 interfaces
Pouya Moetakef,Tyler A. Cain,Daniel G. Ouellette,Jack Y. Zhang,Dmitri O. Klenov,Anderson Janotti,Chris G. Van de Walle,Siddharth Rajan,S. James Allen,Susanne Stemmer +9 more
TL;DR: In this paper, the sheet carrier densities in all structures containing more than one unit cell of SrTiO3 are independent of layer thicknesses and growth sequences, indicating that the mobile carriers are in a high concentration, two-dimensional electron gas bound to the interface.