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Ferromagnetism of undoped GaN mediated by through-bond spin polarization between nitrogen dangling bonds
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10.1063/1.3123169
/content/aip/journal/apl/94/16/10.1063/1.3123169
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/16/10.1063/1.3123169

Figures

Image of FIG. 1.
FIG. 1.

(a) DOS plots calculated for the bulk wurtzite GaN with one Ga-vacancy. (b) DOS plots calculated for the surface of wurtzite GaN with one Ga-vacancy. The partial DOS plot is for the three N atoms surrounding the Ga-vacancy. (c) DOS plots calculated for the surface of wurtzite GaN with one N-vacancy. The partial DOS plot is for the three Ga atoms surrounding the N-vacancy.

Image of FIG. 2.
FIG. 2.

FM coupling between the spins of the N-dangling bonds on the surface of GaN with the (0, 3) configuration of two Ga-vacancies: (a) Illustration of the mechanism of through-bond spin polarization. (b) Spin densities on the N and Ga atoms calculated for the unrelaxed surface, where the N and Ga atoms of only the top two GaN-layers are shown. The up-spin and down-spin densities, represented by blue and red contour-surfaces, respectively, occur on the N and Ga atoms, respectively.

Tables

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Table I.

Relative formation energies calculated for an isolated Ga-vacancy and an isolated N-vacancy in the bulk GaN and on the surface of GaN.a

Generic image for table
Table II.

Values of the relative stability , the magnetic energy difference , the distance between the Ga-vacancy sites (in the unrelaxed surface structure) and the Curie temperature calculated for the (0, ) configurations of two Ga-vacancies on the surface of GaN.

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/content/aip/journal/apl/94/16/10.1063/1.3123169
2009-04-22
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ferromagnetism of undoped GaN mediated by through-bond spin polarization between nitrogen dangling bonds
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/16/10.1063/1.3123169
10.1063/1.3123169
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