Richard Zallen
Professor Emeritus
...
Ph.D.: Harvard
Robeson 301B
(540)231-4566
FAX: (540)-231-7511
rzallen@vt.edu

Physics of Amorphous Solids

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Research Interests
Experimental condensed-matter physics
  • Optical properties of solids
  • Semiconductors
  • Percolation theory
  • Cell patterns during morphogenesis
Some Recent Publications
  • "Raman studies of sol-gel alumina: finite-size effects in nanocrystalline AlO(OH)", C.J. Doss and R. Zallen, Phys. Rev. B 48, 15626 (1993).
  • "Infrared Activity in Elemental Crystals", R. Zallen, R.M. Martin, and V. Natoli, Phys. Rev. B 49, 7032 (1994). To download a 304 KB PDF file of this paper, click here
  • "Infrared Reflectivity and Lattice Fundamentals in Anatase TiO2," R.J. Gonzalez, R. Zallen, and H. Berger, Phys. Rev. B 55, 7014 (1997).  To download a 108 KB PDF file of this paper, click here
  • "Infrared Activity in the Aurivillius Layered Ferroelectric SrBi2Ta2O9", M.P. Moret, R. Zallen, R.E. Newnham, P.C. Joshi, and S.B. Desu, Phys. Rev. B 57, 5715 (1998). To download a 164 KB PDF file of this paper, click here
  • "Brookite-rich Titania Films made by Pulsed Laser Deposition",
    M.P. Moret, R. Zallen, D.P. Vijay, and S.B. Desu, Thin Solid Films 366, 8 (2000).  To download a 112 KB PDF file of this paper, click here.
  • "Infrared Studies of Hole-Plasmon Excitations in Heavily-Doped p-type MBE-grown GaAs:C", W. Songprakob, R. Zallen, 
    W.K. Liu, and K.L. Bacher, Phys. Rev. B 62, 4501 (2000).
    To download a 276 KB PDF file of this paper, click here.
  • "The Sixteen-Percent Solution: Critical Volume Fraction for Percolation", R. Zallen, in Phase Transitions and Self-Organization in Electronic and Molecular Networks, edited by M.F. Thorpe and J.C. Phillips (Kluwer/Plenum, 2001), p. 37. To download a 48 KB PDF file of this paper, click here.
  • "Intervalenceband and plasmon optical absorption in heavily doped GaAs:C", W. Songprakob, R. Zallen, D.V. Tsu, and W.K. Liu, J. Appl. Phys. 91, 171 (2002). To download a 104 KB PDF file of this paper, click here.
  • "Percolation study of defect tolerance in missing-crossbar networks", M.P. Zwolak, R. Zallen, and M. Di Ventra, Solid State Communications 124, 167 (2002). To download a 96 KB PDF file of this paper, click here.
  • "Cell-pattern disordering during convergent extension in Drosophila", J.A. Zallen and R. Zallen, J. Phys.: Condensed Matter 16, S5073 (2004). To download a 188 KB PDF file of this paper, click here.
  • "The optical absorption edge of brookite TiO2", R. Zallen and M.P. Moret, Solid State Communications 137, 154 (2006). To download a 104 KB PDF file of this paper, click here.