Accession Number : ADA271180

Title :   Theoretical and Experimental Studies of Quantum Wells.

Descriptive Note : Final rept. 15 Mar 90-15 Jul 93,

Corporate Author : NORTH CAROLINA UNIV AT CHAPEL HILL

Personal Author(s) : Tsu, Raphael

Report Date : 15 SEP 1993

Pagination or Media Count : 12

Abstract : As the dimension of devices continues to shrink below the mean free path of the electrons, the physics is dominated by the wave nature of the electrons. The transport through a cluster of nanoscale Si-particles in a diode configuration shows discrete steps and peaks in conductance vs voltage at room temperature, attributed to the formation Coulomb blockade, results of Pauli's exclusion principle for the occupation of quantum states in these dots. The extrinsic conduction in these nanoparticles generally disappears due to a significant increase of the binding energy of donors and acceptors because: (1) the decrease of the dielectric screening, and (2) the attractive interaction of the quantized electrons with their images at the interface. The disappearance of the extrinsic conduction constitutes a self-limiting factor in the electrochemical etching of porous silicon. Conduction steps in quantum dots, Conduction peaks in quantum dots, Doping in quantum dots, Porous silicon.

Descriptors :   *QUANTUM ELECTRONICS, *ELECTRONIC STATES, *TRANSPORT PROPERTIES, CONFIGURATIONS, DIELECTRICS, DIODES, DOPING, ELECTRONS, ETCHING, INTERACTIONS, MEAN FREE PATH, ROOM TEMPERATURE, SILICON, VOLTAGE.

Subject Categories : Quantum Theory and Relativity
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE