Open AccessSubnanometer-resolved measurement of the tunneling effective mass using bulk plasmons
Author(s) -
Vlad Stolojan,
Philippe Moreau,
M. J. Goringe,
S. Ravi P. Silva
Publication year - 2006
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.2188593
Subject(s) - superlattice , quantum tunnelling , materials science , effective mass (spring–mass system) , amorphous solid , quantum well , optoelectronics , condensed matter physics , band gap , carbon fibers , amorphous carbon , chemistry , physics , optics , laser , organic chemistry , quantum mechanics , composite number , composite material
International audienceSuperlattices are periodic structures where the constituents alternate between low- and high-bandgap materials; the resulting quantum confinement tailors the resulting device properties and increases their operating speed. Amorphous carbon is an excellent candidate for both the well and barrier layers of the superlattices, leading to a fast and reliable device manufacturing process. We show theoretically and experimentally that, using low energy-loss spatially resolved spectroscopy, we can characterize the component layers of a superlattice. We measure quantum confinement of the electron wave function in the superlattice's wells and calculate the effective tunneling mass for amorphous carbon superlattices as m*=0.067me. This effective mass makes diamondlike carbon films as feasible candidate for electronic device
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom