PENGARUH MEDAN LISTRIK TERHADAP EFEK SEEBECK DAN NERNST ANOMALI PADA MONOLAYER NICKEL (III) BROMIDE MENGGUNAKAN DENSITY FUNCTIONAL THEORY

PUSPA ZUHROTUL KAMILAH, . (2025) PENGARUH MEDAN LISTRIK TERHADAP EFEK SEEBECK DAN NERNST ANOMALI PADA MONOLAYER NICKEL (III) BROMIDE MENGGUNAKAN DENSITY FUNCTIONAL THEORY. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

[img] Text
COVER.pdf

Download (2MB)
[img] Text
BAB I Pendahuluan.pdf

Download (349kB)
[img] Text
BAB II Landasan Teori.pdf
Restricted to Registered users only

Download (691kB) | Request a copy
[img] Text
BAB III Metodologi Penelitian.pdf
Restricted to Registered users only

Download (322kB) | Request a copy
[img] Text
BAB IV Hasil dan Pembahasan.pdf
Restricted to Registered users only

Download (322kB) | Request a copy
[img] Text
BAB V Penutup.pdf
Restricted to Registered users only

Download (322kB) | Request a copy
[img] Text
Daftar Pustaka.pdf

Download (205kB)
[img] Text
Lampiran dan Daftar Riwayat Hidup.pdf
Restricted to Registered users only

Download (349kB) | Request a copy

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh medan listrik eksternal terhadap respons termoelektrik monolayer NiBr₃, khususnya melalui efek Seebeck dan efek Nernst anomali, dengan menggunakan pendekatan Density Functional Theory (DFT). Simulasi dilakukan dengan mempertimbangkan interaksi spin–orbit coupling (SOC) serta variasi intensitas medan listrik yang diterapkan sepanjang sumbu-z dalam kisaran 0-30 V/nm. Hasil menunjukkan bahwa karakter metalik NiBr₃ tetap stabil, dengan perubahan lokal pada struktur pita dan momen magnetik. Medan listrik dan SOC menyebabkan penyempitan celah pita (<0.01 eV) tanpa pembukaan celah signifikan. Nilai koefisien Seebeck (±80 μV/K) dan Nernst anomali (~10⁻⁴ V/K·T) pada 100 K masih relatif rendah, menandakan bahwa medan listrik belum cukup efektif dalam meningkatkan performa termoelektrik. Dengan demikian, studi ini memberikan dasar awal bagi penelitian lanjutan melalui pendekatan alternatif seperti doping, rekayasa regangan (strain engineering), atau substitusi atomik untuk meningkatkan sensitivitas material terhadap pengaruh medan eksternal. ***** This study investigates the impact of external electric fields on the thermoelectric response of monolayer NiBr₃, focusing on the Seebeck and anomalous Nernst effects, through Density Functional Theory (DFT) simulations. The calculations incorporate spin–orbit coupling (SOC) effects and explore electric field intensities along the out-of-plane (z-axis) direction ranging from 0 to 30 V/nm. Results indicate that NiBr₃ retains its metallic or semimetallic character, with only localized modifications observed in its electronic band structure and magnetic moments. While the electric field and SOC interactions induce slight bandgap narrowing (<0.01 eV) and minor distortions in the crystal structure, no significant bandgap opening is found. The Seebeck coefficient (±80 μV/K) and anomalous Nernst signal (~10⁻⁴ V/K·T) at 100 K remain relatively modest, suggesting that the applied electric field within the tested range is insufficient to enhance thermoelectric performance significantly. These findings offer a foundational understanding for further research involving alternative strategies such as doping, strain engineering, or atomic substitution to enhance the material’s sensitivity to external fields.

Item Type: Thesis (Sarjana)
Additional Information: 1). Dr. Teguh Budi Prayitno, M.Si., 2). Dr. Edi Suprayoga
Subjects: Sains > Sains, Ilmu Pengetahuan Alam
Sains > Fisika
Divisions: FMIPA > S1 Fisika
Depositing User: Puspa Zuhrotul Kamilah .
Date Deposited: 12 Aug 2025 07:49
Last Modified: 12 Aug 2025 07:49
URI: http://repository.unj.ac.id/id/eprint/60126

Actions (login required)

View Item View Item