161 citations · 1.1k across the 35 of their papers we have counts for
36 papers
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…
Geometry-controlled magnon-polaritons of double magnetic films in planar cavities
S. Solihin, Ahmad R. T. Nugraha, Muhammad Aziz Majidi
Planar cavity magnonics has been developed mainly for a single magnetic film, leaving multilayer behavior in spatially resolved cavity scattering largely unexplored. Here, we intro…
High-performance Kerr quantum battery
Muhammad Shoufie Ukhtary, Ahmad R. T. Nugraha, Adam B. Cahaya +2
We propose and investigate the performance of a hybrid quantum battery, the so-called Kerr quantum battery, which consists of two interacting quantum oscillators, i.e., the charger…
Phase transition in the majority rule model with the nonconformist agents
Roni Muslim, Sasfan A. Wella, Ahmad R. T. Nugraha
Independence and anticonformity are two types of social behaviors known in social psychology literature and the most studied parameters in the opinion dynamics model. These paramet…
Computational study of III-V direct-gap semiconductors for thermoradiative cell applications
Muhammad Y. Hanna, Muhammad Aziz Majidi, Ahmad R. T. Nugraha
We investigate the performance of thermoradiative (TR) cells using the III-V group of semiconductors, which include GaAs, GaSb, InAs, and InP, with the aim of determining their eff…
Trigonal warping effects on optical properties of anomalous Hall materials
Jyesta M. Adhidewata, Ravanny W. M. Komalig, M. Shoufie Ukhtary +3
The topological nature of topological insulators are related to the symmetries present in the material, for example, quantum spin Hall effect can be observed in topological insulat…
Enhancement of spin mixing conductance by - orbital hybridization in heavy metals
Adam B. Cahaya, Rico M. Sitorus, Anugrah Azhar +2
In a magnetic multilayer, the spin transfer between localized magnetization dynamics and itinerant conduction spin arises from the interaction between a normal metal and an adjacen…
Long-lived qubit entanglement by surface plasmon polaritons in a Weyl semimetal
M Shoufie Ukhtary, Eddwi H. Hasdeo, Andriyan B. Suksmono +1
We investigate spontaneous entanglement of two qubits mediated by nonreciprocal surface plasmon polaritons (SPPs) in a Weyl semimetal. In the absence of external magnetic fields, t…
Opinion dynamics involving contrarian and independence behaviors based on the Sznajd model with two-two and three-one agent interactions
Roni Muslim, M Jauhar Kholili, Ahmad R. T. Nugraha
We investigate the opinion evolution of outflow dynamics based on the Sznajd model on a complete graph involving contrarian and independence behaviors. We consider a group of four…
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…
Investigation of electron and phonon transport in Bi-doped CaMnO for thermoelectric applications
E. Suprayoga, W. B. K. Putri, K. Singsoog +8
Electron and phonon transports in CaMnO3 and its Bi-doped counterpart, Bi0.03Ca0.97MnO3, are investigated by thermoelectric transport measurements, Raman spectroscopy, and first-pr…
Optimal band gap for improved thermoelectric performance of two-dimensional Dirac materials
Eddwi H. Hasdeo, Lukas P. A. Krisna, Muhammad Y. Hanna +3
Thermoelectric properties of two-dimensional (2D) Dirac materials are calculated within linearized Boltzmann transport theory and relaxation time approximation. We find that the ga…
Intersubband plasmon excitations in doped carbon nanotubes
Daria Satco, Ahmad R. T. Nugraha, M. Shoufie Ukhtary +3
We theoretically investigate intersubband plasmon excitations in doped single wall carbon nanotubes (SWNTs) by examining the dependence of plasmon frequency on the nanotube diamete…
Thermoelectric properties of two-dimensional Dirac materials
Eddwi H. Hasdeo, Lukas P. A. Krisna, Ahmad R. T. Nugraha
We performed Boltzmann transport calculation to obtain the Seebeck coefficient, electrical conductivity, electronic thermal conductivity, and thermoelectric figure of merit (ZT) fo…
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…
Negative refraction in Weyl semimetals
M. Shoufie Ukhtary, Ahmad R. T. Nugraha, Riichiro Saito
We theoretically propose that Weyl semimetals may exhibit negative refraction at some frequencies close to the plasmon frequency, allowing transverse magnetic (TM) electromagnetic…
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…