A
Ahmad R. T. Nugraha
Researcher at Indonesian Institute of Sciences
Publications - 95
Citations - 1831
Ahmad R. T. Nugraha is an academic researcher from Indonesian Institute of Sciences. The author has contributed to research in topics: Phonon & Thermoelectric effect. The author has an hindex of 19, co-authored 78 publications receiving 1355 citations. Previous affiliations of Ahmad R. T. Nugraha include Tohoku University.
Papers
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Journal ArticleDOI
Anisotropic Electron-Photon and Electron-Phonon Interactions in Black Phosphorus
Xi Ling,Shengxi Huang,Eddwi H. Hasdeo,Liangbo Liang,William M. Parkin,Yuki Tatsumi,Ahmad R. T. Nugraha,Alexander A. Puretzky,Paul Masih Das,Bobby G. Sumpter,David B. Geohegan,Jing Kong,Riichiro Saito,Marija Drndic,Vincent Meunier,Mildred S. Dresselhaus +15 more
TL;DR: It is shown that once understood, the anisotropic optical absorption appears to be a reliable and simple way to identify the crystalline orientation of BP, which cannot be determined from Raman spectroscopy without the explicit consideration of excitation wavelength and flake thickness, as commonly used previously.
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Quantum Effects in the Thermoelectric Power Factor of Low-Dimensional Semiconductors
TL;DR: The interplay between the confinement length L and the thermal de Broglie wavelength Λ is investigated to optimize the thermoelectric power factor of semiconducting materials and an analytical formula for the power factor is derived based on the one-band model assuming nondegenerate semiconductors.
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Two-dimensional InSe as a potential thermoelectric material
TL;DR: In this paper, Boltzmann transport theory and first-principles calculations as a function of Fermi energy and crystal orientation were used to investigate thermoelectric properties of monolayer indium selenide (InSe).
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Diameter dependence of thermoelectric power of semiconducting carbon nanotubes
TL;DR: In this paper, the Boltzmann transport formalism combined with an extended tight-binding model was used to calculate the thermoelectric power of many semiconducting single wall carbon nanotubes.
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Dielectric constant model for environmental effects on the exciton energies of single wall carbon nanotubes
TL;DR: In this article, a dielectric constant κ which depends on the subband index, nanotube diameter, and exciton size was defined for single wall carbon nanotubes, that are modified by surrounding materials around the tubes (known as the environmental effect).