This thesis is on characterizing the superconducting properties of NbTiN thin films under cryogenic conditions for potential applications in modular quantum computers. The characterization involves development of a measurement setup using a four-point probe method, which measures resistivityof magnetron sputtered thin films of NbTiN at room temperature and (cryogenic) temperature near ab- solute zero.
The results revealed unexpected resistivity values at 3.3 K, questioning the sample’s elemental com- position. Despite superconductivity not being reached by the setup, the research shows how impor- tant optimal elemental composition is and that the implementation of pulsed currents minimizes Joule Heating.
Despite not having characterized superconducting properties, taking steps back might be essential to take a step forward in developing a quantum computer.
This thesis was carried out at TU Delft as part of the Bachelor Final Project course.