@article {Villagonzalo200016446, title = {Behavior of the thermopower in amorphous materials at the metal-insulator transition}, journal = {Phys. Rev. B}, volume = {62}, number = {24}, year = {2000}, note = {cited By 4}, pages = {16446-16452}, abstract = {
We study the behavior of the thermal transport properties in three-dimensional disordered systems close to the metal-insulator transition within linear response. Using a suitable form for the energy-dependent conductivity σ, we show that the value of the dynamical scaling exponent for noninteracting disordered systems such as the Anderson model of localization can be reproduced. Furthermore, the values of the thermopower S have the right order of magnitude close to the transition as compared to the experimental results. A sign change in the thermoelectric power S {\textemdash} as is often observed in experiments {\textemdash} can also be modeled within the linear response formulation using modified experimental σ data as input.
}, doi = {10.1103/PhysRevB.62.16446}, author = {Cristine Villagonzalo and Rudolf A R{\"o}mer and Michael Schreiber and Angus MacKinnon} } @article {Villagonzalo1999179, title = {Thermoelectric transport properties in disordered systems near the Anderson transition}, journal = {Eur. Phys. J. B}, volume = {12}, number = {2}, year = {1999}, note = {cited By 12}, pages = {179-189}, abstract = {
We study the thermoelectric transport properties in the three-dimensional Anderson model of localization near the metal-insulator transition (MIT). In particular, we investigate the dependence of the thermoelectric power S, the thermal conductivity K, and the Lorenz number L0 on temperature T. We first calculate the T dependence of the chemical potential μ from the number density n of electrons at the MIT using an averaged density of states obtained by diagonalization. Without any additional approximation, we determine from the behavior of S, K and L0 at low T as the MIT is approached. We find that the d.c. conductivity and K decrease to zero at the MIT as T -\> 0 and show that S does not diverge. Both S and L0 become temperature independent at the MIT and depend only on the critical behavior of the conductivity.
}, doi = {10.1007/s100510050994}, author = {Cristine Villagonzalo and Rudolf A R{\"o}mer and Michael Schreiber} }