Provider: Ingenta Connect
Database: Ingenta Connect
Content: application/x-research-info-systems
TY - ABST
AU - Akıncı, Özden
AU - Gürel, H. Hakan
AU - Ünlü, Hilmi
TI - Tight Binding Modelling of Energy Band Structure in Nitride Heterostructures
JO - Journal of Nanoscience and Nanotechnology
PY - 2008-02-01T00:00:00///
VL - 8
IS - 2
SP - 540
EP - 548
KW - BAND OFFSETS
KW - HETEROSTRUCTURES
KW - TIGHT BINDING THEORY
KW - III-V NITRIDES
KW - BAND GAPS
N2 - We studied the electronic structure of group III–V nitride ternary/binary heterostructures by using a semi-empirical sp
3
s* tight binding theory, parametrized to provide accurate description of both valence and conductions bands. It is shown that the
sp
3
s* basis, along with the second nearest neighbor (2NN) interactions, spin-orbit splitting of cation and anion atoms, and nonlinear composition variations of atomic energy levels and bond length of ternary, is sufficient to describe the electronic structure of
III–V ternary/binary nitride heterostructures. Comparison with experiment shows that tight binding theory provides good description of band structure of III–V nitride semiconductors. The effect of interface strain on valence band offsets in the conventional Al1−x
Ga
x
N/GaN
and In1−x
Ga
x
N/GaN and dilute GaAs1−x
N
x
/GaAs nitride heterostructures is found to be linear function of composition for the entire composition range (0 ≤ x ≤ 1) because of smaller valence band deformations.
UR - https://www.ingentaconnect.com/content/asp/jnn/2008/00000008/00000002/art00010
M3 - doi:10.1166/jnn.2008.A223
UR - https://doi.org/10.1166/jnn.2008.A223
ER -