ArticleNanoscale advances2026
Quantum engineering of GaAs nanoribbons for advanced thermoelectric energy conversion.
Article in Nanoscale advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Gallium arsenide (GaAs) nanoribbons are promising candidates for advanced thermoelectric applications due to their unique quantum confinement effects, low-dimensional electronic properties, and tunable vibrational characteristics. In this study, we employed a robust computational approach combining the Non-Equilibrium Green's Function (NEGF) formalism with density functional-based tight binding (DFTB) to investigate the electronic, phononic, and thermoelectric transport properties of GaAs nanoribbons. A distinct ≈40 meV acoustic-optical phonon gap is identified, which suppresses acoustic-optical scattering but is counterbalanced by dominant size effects including strong boundary/edge scattering, confinement-induced reductions in group velocity, and acoustic-acoustic umklapp scattering at elevated temperatures, collectively reducing lattice thermal conductivity. Quantum confinement-induced modifications in electron transport mechanisms yield pronounced peaks and sign reversals in Seebeck and Peltier coefficients near the Fermi level, with calculated
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