Physics – Condensed Matter – Materials Science
Scientific paper
2009-06-24
Physics
Condensed Matter
Materials Science
4 figures
Scientific paper
We discuss the mechanism responsible for the observed improvement in the structural properties of In doped GaSe, a layered material of great current interest. Formation energy calculations show that by tuning the Fermi energy, In can substitute for Ga or can go as an interstitial charged defect$(\text{In}_{\text{i}}^{\text{3+}})$. We find that $\text{In}_{\text{i}}^{\text{3+}}$ dramatically increases the shear stiffness of GaSe, explaining the observed enhancement in the rigidity of In doped p-GaSe. The mechanism responsible for rigidity enhancement discussed here is quite general and applicable to a large class of layered solids with weak interlayer bonding.
Fernelius N. C.
Mahanti S. D.
Mandal K. C.
Rak Zs.
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