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Phononic and structural response to strain in wurtzite-gallium nitride nanowires
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10.1063/1.4716476
/content/aip/journal/jap/111/10/10.1063/1.4716476
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/10/10.1063/1.4716476
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Side-view schematic of wurtzite-gallium nitride nanostructure with (a) a rectangular by cross-section, and (b) a triangular by by cross-section. The orange and green circles refer to the gallium and nitrogen atoms, respectively. Dashed box depicts a Ga-N unit cell, with diagonal and parallel bonds.

Image of FIG. 2.
FIG. 2.

Variation of thermal conductivity with strain for both rectangular by and triangular by GaN nanostructures.

Image of FIG. 3.
FIG. 3.

Change of mean bond length with strain for different regions in (a) rectangular and (b) triangular GaN nanostructures.

Image of FIG. 4.
FIG. 4.

Changes in bond energy with strain at vertex and non-vertex regions.

Image of FIG. 5.
FIG. 5.

Vibrational density of states for both (a) rectangular and (b) triangular GaN nanostructures at different strains.

Image of FIG. 6.
FIG. 6.

A Comparison of VDoS peak shifts in both rectangular and triangular GaN nanostructures at different strains.

Image of FIG. 7.
FIG. 7.

Temperature profiles of face of triangular GaN nanostructure with strain (a) ɛ = −3.40%, (b) ɛ = 0, and (c) ɛ = 3.40%.

Image of FIG. 8.
FIG. 8.

Schematic of (a) symmetrically strained, and (b) asymmetrically strained rectangular GaN nanostructures.

Image of FIG. 9.
FIG. 9.

Modulation of phonon softening/stiffening in asymmetrically strained rectangular GaN nanostructures.

Image of FIG. 10.
FIG. 10.

Change of κ–ɛ relationship in asymmetrically strained rectangular GaN nanostructure.

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/content/aip/journal/jap/111/10/10.1063/1.4716476
2012-05-17
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Phononic and structural response to strain in wurtzite-gallium nitride nanowires
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/10/10.1063/1.4716476
10.1063/1.4716476
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