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Master Thesis in Epitaxy

Master Thesis - Distributed polarization doping of group-III nitride alloys by molecular beam epitaxy

Wurtzite group III-nitride semiconductor heterostructures exhibit strong spontaneous and piezoelectric polarization fields on the order of a few MV/cm along the polar c-axis. As electrostatics dictates, when polarization changes in space, corresponding polarization charges are induced at those locations. These polarization charges can be utilized for band diagram engineering of polar-nitride heterostructures for various purposes, including 2D electron gas formation and tunnel junctions. In this MSc thesis study, the successful candidate will work on distributed polarization doping of group-III nitride alloys to develop optimal growth recipes for such alloys at PDI. If time permits, an attempt will be made to demonstrate a polarization-induced dopant-free graded AlxGa1-xN p-n junction.

Your responsibilities

  • Growth of nitride heterostructures by molecular beam epitaxy
  • Sample characterization by x-ray diffractometry, atomic force microscopy, and Hall-effect and C-V measurements
  • Band diagram simulation using 1D Poisson-Schrödinger solver
  • Data analysis and planning of experiments

 

Your profile

  • Bachelor degree in physics, electrical engineering, materials science, or a related field
  • Courses in semiconductor physics, nanotechnology, or a related subject are advantageous

What we offer

  • Modern laboratories with a wide range of experimental techniques
  • Supportive environment with experts for various scientific sub-fields
  • International and culturally diverse community
  • Location in the heart of Berlin with excellent public transport connections

About PDI

The Paul Drude Institute is part of the Forschungsverbund Berlin e.V. and a member of the Leibniz Association. The institute carries out basic and applied research at the nexus of materials science, condensed matter physics, and device engineering. In the Epitaxy department at PDI, a dedicated team of scientists, technicians, postdocs, and students operates 13 MBE systems for the synthesis of a wide range of material systems, including arsenides, nitrides, oxides, and 2D materials. This in-house collaborative environment offers abundant opportunities for both direct and indirect learning in various MBE technologies, making it an ideal place to start a career in the field.

Inclusive & equal opportunity employer

With approximately 100 employees and more than 15 nationalities, PDI is committed to building a talented, inclusive, and culturally diverse workforce. We understand that our shared future is guided by basic principles of fairness and mutual respect.
Among equally qualified applicants, preference will be given to candidates from marginalized groups. As an equal opportunity and family-friendly employer, we offer highly flexible employment conditions, such as flexible working hours, parental leave, and home office, and we strive to create a family- and life-conscious working environment.

Project - Contact

Dr. YongJin Cho

How to apply

Please upload your application by October 03, 2024. 
Your documents should include

  • a dedicated cover letter
  • CV
  • diploma(s) and transcript(s)
  • publication list (if so)
  • letter(s) of recommendation/contact information of references (if so)