First-Principles Combinatorial Design of Transition Temperatures in Multi-Component Systems: The Case of Mn in GaAs

A. Franceschetti, S. V. Dudiy, S. V. Barabash, A. Zunger, J. Xu, M. Van Schilfgaarde

Research output: Contribution to journalArticlepeer-review

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Abstract

The transition temperature TC of multicomponent systems-ferromagnetic, superconducting, or ferroelectric-depends strongly on the atomic arrangement, but an exhaustive search of all configurations for those that optimize TC is difficult, due to the astronomically large number of possibilities. Here we address this problem by parametrizing the TC of a set of ∼50 input configurations, calculated from first principles, in terms of configuration variables ("cluster expansion"). Once established, this expansion allows us to search almost effortlessly the transition temperature of arbitrary configurations. We apply this approach to search for the configuration of Mn dopants in GaAs having the highest ferromagnetic Curie temperature. Our general approach of cluster expanding physical properties opens the way to design based on exploring a large space of configurations.

Original languageAmerican English
Article number047202
Number of pages4
JournalPhysical Review Letters
Volume97
Issue number4
DOIs
StatePublished - 2006
Externally publishedYes

NREL Publication Number

  • NREL/JA-590-40219

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