76 citations · 150 across the 3 of their papers we have counts for
5 papers
Surface magnetization in non-doped ZnO nanostructures
A. L. Schoenhalz, J. T. Arantes, A. Fazzio +1
We have investigated the magnetic properties of non-doped ZnO nanostructures by using {\it ab initio} total energy calculations. Contrary to many proposals that ferromagnetism in n…
Barrierless procedure for substitutionally doping graphene sheets with boron atoms: ab initio calculations
Renato B. Pontes, A. Fazzio, Gustavo M. Dalpian
Using ab initio methods, we propose a simple and effective way to substitutionally dope graphene sheets with Boron. The method consists of selectively exposing each side of the gra…
Pinned Magnetic Impurity Levels in Doped Quantum Dots
Nick S. Norberg, Gustavo M. Dalpian, James R. Chelikowsky +1
Spectroscopic data demonstrate that impurity D/A levels in doped semiconductor nanostructures are energetically pinned, resulting in variations in D/A binding energies with increas…
Electron-induced stabilization of ferromagnetism in GaGdN
Gustavo M. Dalpian, Su-Huai Wei
Using {\it ab initio} band structure calculations and symmetry arguments, we show that the magnetic property of GaGdN is drastically different from TM-doped GaN. The co…
Band structure model of magnetic coupling in semiconductors
Gustavo M. Dalpian, Su-Huai Wei, X. G. Gong +2
We present a unified band structure model to explain magnetic ordering in Mn-doped semiconductors. This model is based on the - and - level repulsions between the Mn io…