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All Journal Indonesian Journal of Chemistry Jurnal Inovasi Penelitian dan Pembelajaran Fisika Indonesian Journal of Physics (IJP)
Adam Sukma Putra
Department Of Physics, Faculty Of Mathematics And Natural Sciences, Universitas Gadjah Mada, Sekip Utara BLS 21, Yogyakarta 55281, Indonesia
Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Physics Other

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Prediction of Rashba Effect on Two-dimensional MX Monochalcogenides (M = Ge, Sn and X = S, Se, Te) with Buckled Square Lattice Ibnu Jihad; Juhri Hendrawan; Adam Sukma Putra; Kuwat Triyana; Moh. Adhib Ulil Absor
Indonesian Journal of Chemistry Vol 20, No 3 (2020)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (725.678 KB) | DOI: 10.22146/ijc.49331

Abstract

The Rashba splitting are found in the buckled square lattice. Here, by applying fully relativistic density-functional theory (DFT) calculation, we confirm the existence of the Rashba splitting in the conduction band minimum of various two-dimensional MX monochalcogenides (M = Ge, Sn and X = S, Se, Te) exhibiting a pair inplane Rashba rotation of the spin textures. A strong correlation has also been found between the size of the Rashba parameter and the atomic number of chalcogen atom for Γ and M point in the first Brillouin zone. Our investigation clarifies that the buckled square lattice are promising for inducing the substantial Rashba splitting suggesting that the present system is promising for spintronics device.
NUMERICAL SIMULATION OF MAXWELL EQUATION USING FINITE DIFFERENCE METHOD IN CASE OF SUBSURFACE CONDUCTIVITY PARAMETER Adam Sukma Putra; Sismanto Sismanto
Jurnal Inovasi Penelitian dan Pembelajaran Fisika Vol 3, No 2 (2022): Volume 3 Number 2 Agustus 2022
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jippf.v3i2.55820

Abstract

The aim of this project is to solve the Maxwell’s Equation using the finite difference (FD) method. We test the governing equation by discretizing the equation in 1-Dimensional System to describe the distribution of the magnitude of Electric and Magnetic Field within the subsurface layer. We assume that earth layer has constant conductivity (σ) where σ>>εω as a consequence that the system is homogenous and isotropic. We consider that the distribution of the field is described by the diffusion equation. We apply the modified form of FD method with Crank-Nicholson to improve the precision of the simulation.
2-Dimensional Pressure Distribution in Saturated Petroleum Reservoir using Finite Difference Adam Sukma Putra; Wahyu Srigutomo
Indonesian Journal of Physics Vol 27 No 1 (2016): Vol 27 No 1 (2016), July 2016
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2155.734 KB) | DOI: 10.5614/itb.ijp.2016.27.1.4

Abstract

The aim of this project is to solve the Darcy’s Equation using the finite difference (FD) method. We test the governing equation by investigating a saturated petroleum reservoir in two-dimensional (2-D) system to describe the distribution of the pressure within the reservoir. We assume that the velocity of the fluid (oil) is incompressible and relatively slow as a consequence that the system is saturated. The model used is a flow in steady state 2-D porous media. We apply the modified form of FN method with Gauss-Seidel to improve the precision of the simulation.
An Application of Inversion Technique to 1-Dimensional Gravity Data in Bayesian Framework using Monte Carlo, Metropolis, and Simulated Annealing Algorithm Adam Sukma Putra; Wahyu Srigutomo; Yuant Tiandho; Herlin Tarigan; Yanti Yanti
Indonesian Journal of Physics Vol 30 No 1 (2019): Vol 30 No 1 (2019)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (716.912 KB) | DOI: 10.5614/itb.ijp.2019.30.1.1

Abstract

The purpose of this paper is to present a simulation to the inversion methods applied to geophysical exploration. Anapplication of Monte-Carlo, Metropolis, and Simulated Annealing techniques to 1-Dimensional gravity inversion inBayesian framework has been studied. Differences between these methods are observed in both single parameterinversion and simultaneous multi parameter inversion. After selecting the best inversion strategy from the three methods,a further investigation was investigated. Multi parameter inversion for two anomalies is simultaneously carried out andresults are observed. The synthetical data of GRAV2DC free source were used instead of observed data.
Co-Authors Herlin Tarigan Ibnu Jihad Juhri Hendrawan Kuwat Triyana Moh. Adhib Ulil Absor Sismanto Sismanto Wahyu Srigutomo Yanti Yanti Yuant Tiandho