Accession Number : ADA329782

Title :   Ballistic Electron Emission Spectroscopy Study of Transport through Semiconductor Quantum Wells and Quantum Dots

Descriptive Note : Final rept. 15 Jul 94-14 Jul 97

Corporate Author : CALIFORNIA UNIV SANTA BARBARA

Personal Author(s) : Narayanamurti, Venkatesh

PDF Url : ADA329782

Report Date : 01 SEP 1997

Pagination or Media Count : 15

Abstract : This report summarizes the development and use of Ballistic Electron Emission Microscopy (BEEM) for nondestructive, local characterization of semiconductor heterostructures under AFOSR grant No. F49620-94-1-0378. The technique has been applied for measuring heterojunction band offsets, for studying band structure effects in electron tunneling through double barrier resonant tunneling structures, and for imaging current flow through buried mesoscopic structures such as quantum dots (approx. 10nm in size) and misfit dislocations 80nm below the surface. Monte Carlo simulations of the transport have also been performed. The results suggest that BEEM is a powerful new low energy electron microscopy for materials physics study on the nm scale.

Descriptors :   *ELECTRON TRANSPORT, *ELECTRON MICROSCOPY, *ELECTRON EMISSION, SPECTROSCOPY, QUANTUM WELLS, TUNNELING(ELECTRONICS), SEMICONDUCTORS.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE