161 citations · 1.1k across the 35 of their papers we have counts for
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Spin Response Properties in Electronically Robust Ferromagnetic Strained CrSiSe Monolayer under External Electric Fields
S. Solihin, Ahmad R. T. Nugraha, Muhammad Aziz Majidi
Integrating two-dimensional van der Waals magnets into field-effect spintronic devices requires robust charge stability and tunable spin responses. In this study, we investigate th…
Spin-tunable thermoelectric performance in monolayer chromium pnictides
Melania S. Muntini, Edi Suprayoga, Sasfan A. Wella +6
Historically, finding two-dimensional (2D) magnets is well known to be a difficult task due to instability against thermal spin fluctuations. Metals are also normally considered po…
Enhanced thermoelectric performance by van Hove singularities in the density of states of type-II nodal-line semimetals
Nguyen T. Hung, Jyesta M. Adhidewata, Ahmad R. T. Nugraha +1
The effects of the unique density of states (DOS) of a topological type-II nodal-line semimetal (NLS) on its thermoelectric (TE) transport properties are investigated through a com…
Thermoelectric properties of semiconducting materials with parabolic and pudding-mold band structures
Jyesta M. Adhidewata, Ahmad R. T. Nugraha, Eddwi H. Hasdeo +2
We theoretically investigate the thermoelectric properties of semiconducting (gapped) materials by varying the degrees of polynomials in their energy dispersion relations, in which…
Anomalous Phonon-mode Dependence in Polarized Raman Spectroscopy of Topological Weyl Semimetal TaP
Kunyan Zhang, Xiaoqi Pang, Tong Wang +8
Topological Weyl semimetals (WSMs) have attracted widespread interests due to the chiral Weyl fermions and surface Fermi arcs that enable unique optical and transport phenomena. In…
Two-dimensional MoS electromechanical actuators
Nguyen T. Hung, Ahmad R. T. Nugraha, Riichiro Saito
We investigate electromechanical properties of two-dimensional MoS monolayers in the 1H, 1T, and 1T structures as a function of charge doping by using density function…
Universal curve of optimum thermoelectric figures of merit for bulk and low-dimensional semiconductors
Nguyen T. Hung, Ahmad R. T. Nugraha, Riichiro Saito
Analytical formulas for thermoelectric figure of merit and power factor are derived based on the one-band model. We find that there is a direct relationship between the optimum fig…
Three-dimensional carbon Archimedean lattices for high-performance electromechanical actuators
Nguyen T. Hung, Ahmad R. T. Nugraha, Riichiro Saito
We propose three-dimensional carbon (3D-C) structures based on the Archimedean lattices (ALs) by combining bonding in the polygon edges and bonding in the polygon ver…
Two-dimensional InSe as a potential thermoelectric material
Nguyen T. Hung, Ahmad R. T. Nugraha, R. Saito
Thermoelectric properties of monolayer indium selenide (InSe) are investigated by using Boltzman transport theory and first-principles calculations as a function of Fermi energy an…
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…
Excitonic effects on coherent phonon dynamics in single wall carbon nanotubes
Ahmad R. T. Nugraha, Eric Rosenthal, Eddwi H. Hasdeo +4
We discuss how excitons can affect the generation of coherent radial breathing modes in ultrafast spectroscopy of single wall carbon nanotubes. Photoexcited excitons can be localiz…
Origin of electronic Raman scattering and the Fano resonance in metallic carbon nanotubes
Eddwi H. Hasdeo, Ahmad R. T. Nugraha, Kentaro Sato +2
Fano resonance spectra for the G band in metallic carbon nanotubes are calculated as a function of laser excitation energy in which the origin of the resonance is given by an inter…