SIMULASI DINAMIKA MOLEKULER KUANTUM DARI DENSITAS MUATAN PLASMA UNTUK SISTEM SEDERHANA

Albert Zicko Johannes

Abstract


Pemodelan ab-initio Dinamika Molekuler Kuantum dari densitas muantan plasma telah telah dilakukan. Metode yang digunakan adalah Dinamika Molekuler Car-Parrinello, dimana metode ini dapat mensimulasikan pergerakan dinamis dari elektron dan ion pada suatu temperatur rata-rata. Penelitian ini bertujuan  mensimulasikan perubahan densitas muatan dari kluster atom Hidrogen dan atom Oksigen (10 atom) pada temperatur 1300 K. Hasil menunjukkan densitas muatan setelah perubahan waktu 0.120 ps untuk setiap kluster mengalami perubahan bandwidth distribusi densitas. Untuk kluster H sebesar 0.021 bohr-3, kluster H-O (50% H - 50% O) sebesar 0.069 bohr-3 dan kluster O sebesar -0.241 bohr-3. Perubahan ini menunjukkan sebaran densitas dipengaruhi oleh jenis ion plasma.

Kata Kunci   :  Dinamika Molekuler Kuantum, Plasma, Densitas muatan, Dinamika Molekul Car-Parrinello.

The ab-initio Quantum Molecular Dynamics modeling of plasma charge density is performed. The Method used in this research is Car-Parrinello Molecular Dynamics, which is can simulate the dynamics of electrons and ions at some average temperature. This research purpose is to simulate the change in charge density of Hidrogen and Oxygen atom cluster  (10 atoms) at the average temperature 1300 K. The results show the charge density after time difference 0.120 ps for each clusters experience change in bandwidth. For H cluster is 0.021 bohr-3, H-O cluster (50% H - 50% O)  is 0.069 bohr-3 and O cluster is -0.241 bohr-3. This change shows that the density distribution is influenced by the types of plasma ions.

Keywords  :  Quantum Molecular Dynamics, Plasma, Charge Density, Car-  

  Parrinello Molecular Dynamics.


References


Miloshevsky,G. and Hassanein, A. (2014) Quantum Modeling of Electronic Charge Density in Warm Dense Matter, IEEE Transctions on Plasma Science, 42(10): 2508-2509

Collins, L., Kwon, I., Kress, J., Troullier, N. and Lynch, D. (1995) Quantum Molecular Dynamics Simulations of Hot, Dense Hydrogen. Physical Review E, 52: 6202-6219.

Kahane, S. (2017) Quantum Molecular Dynamics Simulations of Warm Dense Li Plasma. Open Journal of Modelling and Simulation , 5: 189-217.

Dipojono, H.K.(2001) Simulasi Dinamika Mokekul (Sebuah Pengantar), di dalam Prosiding Seminar Nasional Hamburan Neutron dan Sinar-X ke 4: 11-12, Serpong, ISSN 1410-7686

Giannozzi, P., Andreussi, O., Brumme, T., Bunau O., Nardelli, M.B., Calandra,M., Car, R., Cavazzoni,C.,Ceresoli,D.,Cococcioni, M., Colonna N.,Carnimeo,I. ,Corso, A.D., de Gironcoli, S., Delugas, P., DiStasio Jr, R.A.,Ferretti, A., Floris, A., Fratesi, G., Fugallo, G. , Gebauer, R., Gerstmann, U., Giustino,F., Gorni, T., Jia,J., Kawamura,M.,Ko,H.-Y., Kokalj,A., Küçükbenli, E., Lazzeri, M., Marsili, M., Marzari,N., Mauri, F., Nguyen, N.L., Nguyen,H.-V., Otero-de-la-Roza,A., Paulatto, L., Poncé,S., Rocca,D., Sabatini,R., Santra, B., Schlipf, M., Seitsonen, A.P., Smogunov,A.,Timrov,I., Thonhauser ,T., Umari,P., Vast.N., Wu,X. and Baroni, S. (2017) Advanced Capabilities for Materials Modelling with Quantum ESPRESSO, J.Phys. Condens.Matter 29: 465901

Kokalj, A. , XCrySDen - a New Program for Displaying Crystalline Structures and Electron Densities (1999) J. Mol. Graphics Modelling, 17:171-179.




DOI: https://doi.org/10.17509/wafi.v3i1.11083

Refbacks

  • There are currently no refbacks.


Copyright (c) 2018 Wahana Fisika

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Wahana Fisika e-ISSN : 2549-1989 (SK no. 0005.25491989/JI.3.1/SK.ISSN/2017.02 ) published by Physics Program ,  Universitas Pendidikan Indonesia Jl. Dr.Setiabudhi 229 Bandung. The journal is indexed by DOAJ (Directory of Open Access Journal) SINTA and Google Scholar. Contact: Here

Creative Commons License Lisensi : Creative Commons Attribution-ShareAlike 4.0 International License.

View Stats