Now showing items 1-10 of 423
Thomas-Fermi approximation in two p-type delta-doped quantum wells in GaAs and Si
(Revista Mexicana de Física, 2009)
Absence of Cooper-type bound states in three- and few-electron systems
It is shown that the appearance of a fixed-point singularity in the kernel of the two-electron Cooper problem is responsible for the formation of the Cooper pair for an arbitrarily weak attractive interaction between two ...
A theoretical analysis of Sb5+ incorporation in highly doped SnO2 matrix
We have used the periodic quantum-mechanical method with density functional theory at the B3LYP hybrid functional level in order to study the doping of SnO2 with pentavalent Sb5+. The 72-atom 2x3x2 supercell SnO2 (Sn24O48) ...
A generalized theory of electrical characteristics of schottky barriers for amorphous materials
In the present paper, we discuss a generalized theory of electrical characteristics for amorphous semiconductor (or insulator) Schottky barriers, considering: (i) surface states, (ii) doping impurity states at a single ...
Modelo simple del proceso de condensación de electrones
(Universidad Nacional de Ingeniería, 2019)
Determination of density of states in PPS from space-charge-limited current measurements
Space-charge-limited currents measurements have been carried out on undoped amorphous poly p-phenylene sulfide. The scaling law is checked for different samples with varying thickness, and J-V data analyzed. The position ...
Insulator-to-metal transition driven by clustering of solitons in polyacetylene
It's believed that the simple Su-Schrieffer-Heeger Hamiltonian can not predict the insulator to metal transition of transpolyacetylene (t-PA). The soliton lattice configuration at a doping level y=6% still has a semiconductor ...