Welcome to my webpage

I am an experimental physicist working as a permanent scientist at the University of Cologne in the group of Prof. Y. Ando.

Research Interests

• topological matter & devices
• transport in quantum devices
• Majorana fermions in TI/SC hybrid devices
• thermodynamics and transport
• quantum phase transitions
• low-dimensional spin systems

Scientific Carreer

• since 2020: principal investigator in CRC1238
• since 2015: Postdoc in the group of Prof. Y. Ando, University of Cologne
• 2011-2015: PhD Student, University of Cologne
  Dissertation: "Thermodynamics of the Spin-Chain Compounds Cs₂CoCl₄ and Cu(C₄H₄N₂)(NO₃)₂"
  Advisor: Prof. T. Lorenz
• 2011: Physics diploma
• 2004-2011: Physics studies

Other interests

In our clean room facilities at the Institute of Physics 2 we run a full set of user-operated tools for microfabrication of nanometer-scale devices based on topological matter. We gave this class of devices the name topological devices. Besides managing the scientific projects, significant efforts are also put into maintaining machines, optimizing processes and innovation of new instrumentation. As such we service all machines ourselves and develop new ideas and tools to enhance the research on topological devices. As such we designed:

• various type of out-of-plane and in plane chip carriers and holders for cryostats (3He and 3He/4He)
• custom 24-pin sample probe and carrier for QD  PPMS
• a complete setup for measuring fabricated chips without wire bonding down to mK temperatures, including prepatterned chip designs, spring-loaded pin connections, including back-gate connections, protective sample cases, full ESD safety, and more
• self-made evaporators for tube furnace in-situ thermal evaporation

Publications

https://scholar.google.com/citations?user=_yB-pPYAAAAJ&hl=en