Raj Kumar Paudel
Postdoctoral Research Fellow
Department of Physics, National Cheng Kung University, Tainan, Taiwan
About Me
I am currently a Postdoctoral Research Fellow under Prof. Ming-Hao Liu in the Department of Physics at National Cheng Kung University (NCKU), Taiwan. My research focuses on computational condensed matter physics and quantum materials, combining first-principles calculations, many-body theory, and quantum transport simulations to investigate electronic, optical, and excitonic phenomena in low-dimensional systems.
I received my Ph.D. in Physics through the Taiwan International Graduate Program (TIGP) at Academia Sinica in collaboration with National Central University. Under the supervision of Prof. Yia-Chung Chang, I worked on developing and applying the Semi-Empirical Pseudopotential Method (SEPM) to study the electronic structure and optical properties of two-dimensional materials. My current research interests include excitons in layered semiconductors, moiré materials, quantum transport, and large-scale electronic structure calculations of nanoscale systems.
Research Interests
Computational Methods
- Density Functional Theory (DFT)
- Semi-Empirical Pseudopotential Method (SEPM)
- GW-BSE and Exciton Theory
- Quantum Transport (NEGF)
- High-Performance Scientific Computing
Materials and Systems
- Transition Metal Dichalcogenides (TMDCs)
- Twisted and Moiré Materials
- Graphene and Graphene Nanostructures
- Fullerenes (C60 and Related Systems)
- Quantum Transport (F4TCNQ adsorption on graphene)
- Low-Dimensional Quantum Materials
Current Research Projects
Excitons in Layered and Twisted TMDCs
Investigating interlayer and intralayer excitons in bilayer and twisted transition metal dichalcogenides, including the effects of electric fields, moiré potentials, and dielectric screening on exciton energies and optical properties.
Quantum Transport in Molecular and 2D Systems
Developing first-principles quantum transport workflows using DFT, Wannier methods, and non-equilibrium Green's functions (NEGF) to study charge transport in molecular junctions, graphene-based devices, and low-dimensional nanostructures.
SEPM Development for layer TMDCs
Extending the Semi-Empirical Pseudopotential Method to efficiently model electronic and optical properties of large-scale systems, including layered materials, moiré superlattices, and fullerene-based nanostructures.