E. Cuevas et al., ELECTRODE SCREENING OF THE COULOMB GAP, Philosophical magazine. B. Physics of condensed matter. Structural, electronic, optical and magnetic properties, 70(6), 1994, pp. 1231-1235
Computer simulation of tunnelling into materials with a Coulomb gap is
presented. The model system is a three-dimensional Coulomb glass lyin
g to one side of an infinite plane. An equipotential near the plane si
mulates the electrode, which screens the Coulomb interaction between l
ocalized electrons in the Coulomb glass. The depth-dependent one-parti
cle density of states is computed, and the results are then used to ob
tain the tunnelling conductance of the system as a function of voltage
.