Effects of many-electron jumps in the relaxation and conductivity of Coulomb glasses

A numerical study of the energy relaxation and conductivity of the Coulomb glass is presented. The role of many-electron transitions is studied by two complementary methods: a kinetic Monte Carlo algorithm and a master equation in configuration space method. A calculation of the transition rate for two-electron transitions is presented, and the proper extension of this to multi-electron transitions is discussed. It is shown that two-electron transitions are important in bypassing energy barriers which effectively block sequential one-electron transitions. The effect of two-electron transitions is also discussed.

[1]  J. Bergli,et al.  Study of two‐electron jumps in relaxation of Coulomb glasses , 2009 .

[2]  F. Gay,et al.  Anomalous electric-field effect and glassy behaviour in granular aluminium thin films: electron glass? , 2007 .

[3]  A. Somoza,et al.  Collective variable-range hopping in the Coulomb gap: Computer simulations , 2006 .

[4]  E. Al,et al.  Variable range hopping in two-dimensional systems of interacting electrons. , 2002 .

[5]  A. Díaz-Sánchez,et al.  Coulomb interactions in Anderson insulators , 2001 .

[6]  Mark Lee,et al.  Evidence for many-electron composite charge excitations in a Coulomb glass , 2000 .

[7]  A. Mobius,et al.  Nonergodic effects in the Coulomb glass: Specific heat , 2000, cond-mat/0006229.

[8]  Ovadyahu,et al.  Aging effects in an anderson insulator , 2000, Physical review letters.

[9]  Adams,et al.  Coulomb gap: how a metal film becomes an insulator , 2000, Physical review letters.

[10]  D. Grupp,et al.  Anomalous Hopping Exponents of Ultrathin Films of Metals , 2000, cond-mat/0001162.

[11]  M. Pepper,et al.  Influence of parallel magnetic fields on a single-layer two-dimensional electron system with a hopping mechanism of conductivity , 1999, cond-mat/9910210.

[12]  A. Díaz-Sánchez,et al.  Dielectric susceptibility of the Coulomb glass , 1999, cond-mat/9902145.

[13]  E. Haller,et al.  Electrical properties of isotopically enriched neutron-transmutation-doped 70 Ge:Ga near the metal-insulator transition , 1998, cond-mat/9806267.

[14]  E. Cuevas,et al.  Conductivity of the two-dimensional Coulomb glass , 1997 .

[15]  Cummings,et al.  Hopping Conduction and Metal-Insulator Transition in Isotopically Enriched Neutron-Transmutation-Doped 70Ge:Ga. , 1996, Physical review letters.

[16]  Schreiber,et al.  Low-temperature many-electron hopping conductivity in the Coulomb glass. , 1995, Physical review. B, Condensed matter.

[17]  D. Parsons,et al.  Anomalously narrow Coulomb gap , 1993 .

[18]  Zhang,et al.  Hopping conduction in partially compensated doped silicon. , 1993, Physical review. B, Condensed matter.

[19]  C. J. Adkins.  Conduction in granular metals-variable-range hopping in a Coulomb gap? , 1989 .

[20]  Alexander L. Efros,et al.  Electronic Properties of Doped Semi-conductors , 1984 .

[21]  M. Pollak.  A theory for many-electron hopping rates , 1981 .

[22]  Nevill Mott,et al.  Conduction in glasses containing transition metal ions , 1968 .