Tunneling Modes and Local Structural Order in Amorphous Arsenic
- 21 May 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 42 (21), 1413-1416
- https://doi.org/10.1103/physrevlett.42.1413
Abstract
Pulsed nuclear-quadrupole-resonance (NQR) measurements have been performed in rhombohedral, orthorhombic, and amorphous ($a\ensuremath{-}$) arsenic. Measurements of ${T}_{1}$ provide evidence of low-frequency disorder modes in $a$-As, while the NQR frequencies indicate that the bonding is predominately $p$-like in all three materials. The asymmetric NQR line shape of $a$-As indicates that bond-angle distributions inferred from x-ray scattering and continuous-random-network models do not result primarily from a distribution in bond hydridizations.
Keywords
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