Title page for ETD etd-09092011-104434


Type of Document Dissertation
Author Shimer, Matthew Timothy
Author's Email Address mshimer5@vt.edu
URN etd-09092011-104434
Title Nonequilibrium Relaxation and Aging Scaling Properties of the Coulomb Glass and Bose Glass
Degree PhD
Department Physics
Advisory Committee
Advisor Name Title
Tauber, Uwe C. Committee Chair
Kulkarni, Rahul V. Committee Member
Pleimling, Michel J. F. Committee Member
Robinson, Hans D. Committee Member
Keywords
  • bose glass
  • coulomb glass
  • disordered semiconductors
  • aging
Date of Defense 2011-08-26
Availability unrestricted
Abstract
We use Monte Carlo simulations in order to investigate the density of states and the two-time

density autocorrelation function for the two- and three-dimensional Coulomb glass as well

as the Bose glass phase of flux lines in type-II superconductors. We find a very fast forming

gap in the density of states and explore the dependence of temperature and filling fraction.

By studying two scaling methods, we find that the nonequilibrium relaxation properties can

be described sufficiently by a full-aging scaling analysis. The scaling exponents depend on

both temperature and filling fraction, and are thus non-universal. We look at the trends of

these exponents and found that as either the temperature decreases or the filling fraction

deviates more from half-filling, the exponents reflect slower relaxation kinetics. With two

separate interaction potentials, a comparison of relaxation rates and the gap in the density

of states is made.

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