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dc.contributor.authorZhang, Muwei
dc.contributor.authorLi, Xiaohang
dc.date.accessioned2017-10-03T12:49:29Z
dc.date.available2017-10-03T12:49:29Z
dc.date.issued2017-06-14
dc.identifier.citationZhang M, Li X (2017) Structural and electronic properties of wurtzite B x Al1-x N from first-principles calculations. physica status solidi (b) 254: 1600749. Available: http://dx.doi.org/10.1002/pssb.201600749.
dc.identifier.issn0370-1972
dc.identifier.doi10.1002/pssb.201600749
dc.identifier.urihttp://hdl.handle.net/10754/625612
dc.description.abstractThe structural and electronic properties of wurtzite BAlN (0≤x≤1) are studied using density functional theory. The change of lattice parameters with increased B composition shows small bowing parameters and thus slightly nonlinearity. The bandgap exhibits strong dependence on the B composition, where transition from direct to indirect bandgap occurs at a relatively low B composition (x∼0.12) is observed, above which the bandgap of BAlN maintained indirect, thus desirable for low-absorption optical structures. The Γ-A and Γ-K indirect bandgaps are dominant at lower and higher B compositions, respectively. Density of states (DOS) of the valence band is susceptible to the B incorporation. Strong hybridization of Al, B, and N in p-states leads to high DOS near the valence band maximum. The hybridization of Al and B in s-states at lower B compositions and p-states of B at higher B compositions give rise to high DOS near lower end of the upper valence band. Charge density analysis reveals the B-N chemical bond is more covalent than the Al-N bond. This will lead to more covalent crystal with increasing B composition. Dramatic change of the heavy hole effective mass is found due to significant curvature increase of the band by minor B incorporation.
dc.description.sponsorshipThe authors would like to acknowledge the support of Gulf Cooperation Council (GCC) Research Program REP/1/3189-01-01, KAUST Baseline BAS/1/1664-01-01, and KAUST Equipment Fund BAS/1/1664-01-07.
dc.publisherWiley
dc.relation.urlhttp://onlinelibrary.wiley.com/doi/10.1002/pssb.201600749/full
dc.subjectBAlN
dc.subjectBand structure
dc.subjectEffective mass
dc.subjectFirst-principles calculations
dc.titleStructural and electronic properties of wurtzite Bx Al1-x N from first-principles calculations
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.identifier.journalphysica status solidi (b)
kaust.personZhang, Muwei
kaust.personLi, Xiaohang
kaust.grant.numberBAS/1/1664-01-01
kaust.grant.numberBAS/1/1664-01-07
dc.date.published-online2017-06-14
dc.date.published-print2017-08


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