Ditemukan 3 dokumen yang sesuai dengan query
Wojciech Gwidzala
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ABSTRACTWe studied ultrathin layers of 𝑛 cyanobiphenyl (𝑛 = 5,6,7,8) mesogene molecules
forming thin films on a graphene plane using molecular dynamics simulations in a wide temperature
range (220 420 K). Each modeled ensemble was heated to the maximum temperature and
then cooled (reverse procedure). We calculated the second rank order parameter as a measure
of the molecular order of mesogene molecules and we discuss the distribution of angles between
them and the global sample director."
Gdansk: TASK, 2018
600 SBAG 22:2 (2017)
Artikel Jurnal Universitas Indonesia Library
"The numerical solution of the-dependen ginzbur-landau equatation,was done to seek the dynamics of an of an external magnetic field applied into the type II superconductor"
Artikel Jurnal Universitas Indonesia Library
Rangkuti, Choirun Nisaa
"Kami melakukan perhitungan konduktivitas optis pada layered (perovskite) Pr0.5Ca1.5MnO4 untuk mengidentifikasi fenomena charge-ordering. Pemodelan melibatkan orbital Mn dan O yang berada pada bidang MnO2 dari layered Pr0.5Ca1.5MnO4. Interaksi yang diperhitungkan dalam pemodelan yaitu interaksi Coulomb inter-orbital dan intra-orbital, distorsi Jahn-Teller dan exchange interaction dengan menerapkan beberapa asumsi. Perhitungan dilakukan menggunakan Dynamical Mean Field Theory untuk mencapai self-consistency. Hasil perhitungan menunjukkan profile yang mendekati hasil eksperimen dengan puncak charge-ordering berada di bawah 1 eV dan puncak charge-transfer pada 3-3.7 eV. Di bawah temperatur TCO/OO (~325 K), puncak charge-ordering mengalami blue shift seiring dengan penurunan temperatur.
We calculate the optical conductivity of layered (perovskite) Pr0.5Ca1.5MnO4 to capture charge-ordering phenomena. The calculations are based on a model which considers Mn and O orbitals within the MnO2 plane of layered Pr0.5Ca1.5MnO4. Interaction terms included in the model with some assumptions are the inter-orbital and intra-orbital Coulomb repulsions, the static Jahn-Teller distortion and the exchange interaction. We calculate within Dynamical Mean Field Theory to achieve self-consistency. The result shows a profile similar to recent experimental data, where the charge-ordering peak appears below 1 eV and charge-transfer peak at 3-3.7 eV. For temperature lower than TCO/OO (~325 K), the charge-ordering peak undergoes a blue shift as the temperature is decreased.
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Depok: Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2019
T52594
UI - Tesis Membership Universitas Indonesia Library