134 citations · 473 across the 11 of their papers we have counts for
11 papers
Extended point defects in crystalline materials: Ge and Si
Nick E. B. Cowern, Sergei Simdyankin, Chihak Ahn +10
B diffusion measurements are used to probe the basic nature of self-interstitial 'point' defects in Ge. We find two distinct self-interstitial forms - a simple one with low entropy…
Atomic-charge distribution in glasses by terahertz spectroscopy
S. N. Taraskin, S. I. Simdyankin, S. R. Elliott
It is demonstrated that the width of the uncorrelated atomic-charge distribution in glasses can be extracted from the frequency dependence of the coupling coefficient for the far-i…
Universal Features of Terahertz Absorption in Disordered Materials
S. N. Taraskin, S. I. Simdyankin, S. R. Elliott +2
Using an analytical theory, experimental terahertz time-domain spectroscopy data and numerical evidence, we demonstrate that the frequency dependence of the absorption coupling coe…
Influence of copper on the electronic properties of amorphous chalcogenides
S. I. Simdyankin, M. Elstner, T. A. Niehaus +2
We have studied the influence of alloying copper with amorphous arsenic sulfide on the electronic properties of this material. In our computer-generated models, copper is found in…
A new type of charged defect in amorphous chalcogenides
S. I. Simdyankin, T. A. Niehaus, G. Natarajan +2
We report on density-functional-based tight-binding (DFTB) simulations of a series of amorphous arsenic sulfide models. In addition to the charged coordination defects previously p…
Simulation of the physical properties of the chalcogenide glass AsS using a density-functional-based tight-binding method
S. I. Simdyankin, S. R. Elliott, Z. Hajnal +2
We have used a density-functional-based tight-binding method in order to create structural models of the canonical chalcogenide glass, amorphous (a-)AsS. The models range f…