182 citations · 2.3k across the 53 of their papers we have counts for
8 papers · 1 filter
Charge-induced electrochemical actuation of armchair carbon nanotube bundles
Nguyen T. Hung, Ahmad R. T. Nugraha, Riichiro Saito
The effects of charge doping on the structural deformation and on the electronic structure of armchair single wall carbon nanotube (SWNT) bundles are investigated through first-pri…
Phonon-assisted indirect transitions in angle-resolved photoemission spectra of graphite and graphene
Pourya Ayria, Shin-ichiro Tanaka, Ahmad R. T. Nugraha +2
Indirect transitions of electrons in graphene and graphite are investigated by means of angle-resolved photoemission spectroscopy (ARPES) with several different incident photon ene…
Fermi energy dependence of first- and second-order Raman spectra in graphene: Kohn anomaly and quantum interference effect
Eddwi H. Hasdeo, Ahmad R. T. Nugraha, Mildred Dresselhaus +1
Intensity of the first- and the second-order Raman spectra are calculated as a function of the Fermi energy. We show that the Kohn anomaly effect, i.e., phonon frequency renormaliz…
Broadband Transverse Electric Surface Wave in Silicene
M. Shoufie Ukhtary, Ahmad R. T. Nugraha, Eddwi H. Hasdeo +1
Transverse electric (TE) surface wave in silicine is theoretically investigated. The TE surface wave in silicene is found to exhibit better characteristics compared with that in gr…
Selective coherent phonon mode generation in single wall carbon nanotubes
Ahmad R. T. Nugraha, Eddwi H. Hasdeo, Riichiro Saito
The pulse-train technique within ultrafast pump-probe spectroscopy is theoretically investigated to enhance a specific coherent phonon mode while suppressing the other phonon modes…
Quantum effects in the thermoelectric power factor of low-dimensional semiconductors
Nguyen T. Hung, Eddwi H. Hasdeo, Ahmad R. T. Nugraha +2
We theoretically investigate the interplay between the confinement length and the thermal de Broglie wavelength to optimize the thermoelectric power factor of semiconductin…