Physics

 

Research Interests:

I am a member of the Novel Materials Laboratory, headed by Professor Kevin Smith. My research is broadly aimed at determining the electronic structure of new and unusual condensed matter systems. Primarily, I use synchrotron based soft x-ray spectroscopy to extract band structure information from these novel systems. In particular I focus on the techniques of resonant x-ray emission spectroscopy (RXES) and angle resolved photoemission spectroscopy (ARPES). I am also interested in the theoretical basis for the novel electronic structures found in these materials, and regularly use calculations based on the density functional theory and Hartree-Fock approximations in concert with my experimental work.

Selected papers:

• 12/01/10 Soft x-ray spectroscopic study of the ferromagnetic insulator V{_0.82}Cr{_0.18}O{_2}
• 06/22/10 Direct evidence of metallicity at ZnO (0001bar)-(1x1) surfaces from angle-resolved photoemission spectroscopy
• 02/19/10 Tunable electrical and optical properties of hafnium nitride thin films
• 02/10/10 Electronic structure of N,N'-ethylene-bis(1,1,1-trifluoropentane-2,4-dioneiminato)-copper(II) (Cu-TFAC), from soft X-ray spectroscopies and density functional theory calculations
• 01/28/10 Electronic Structure of the Rare-Earth Nitrides
• 01/19/10 Electronic band structure information of GdN extracted from x-ray absorption and emission spectroscopy
• 01/18/10 Magnetic properties of ErN films
• 01/11/10 Electronic structure of C60/Phthalocyanine/ITO interfaces studied using soft x-ray spectroscopies
• 09/23/09 Growth and properties of epitaxial GdN
• 02/12/09 Vibrational properties of rare-earth nitrides: Raman spectra and theory
• 11/19/08 Electronic properties of (Ga,Mn)N thin films with high Mn content
• 11/06/08 Near-zero moment ferromagnetism in the semiconductor SmN
• 10/14/08 Band structure of ZnO from resonant x-ray emission spectroscopy
• 12/20/07 Comparison between experiment and calculated band structures for DyN and SmN
• 08/29/07 Ferromagnetic redshift of the optical gap in GdN
• 03/24/07 Photocurrent diffusion length in disordered GaN
• 06/20/06 Semiconducting ground state of GdN thin films
• 02/13/06 Photoconductivity in nanocrystalline GaN and amorphous GaON

Mailing address:

Andrew Preston X1B NSLS, Building 725 Brookhaven National Lab Upton, NY 11973 (map)

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