Research group Experimental Condensed Matter Physics: Superconductivity and Nanotechnology
Superconductivity is a fascinating phenomenon that allows the observation of quantum-mechanical behavior in macroscopic objects. Therefore, it can be employed for building quantum electronic components using conventional nanotechnology tools.
A Josephson junction is the key element of superconducting electronics. The group employs such junctions for both fundamental studies of unconventional and high-temperature superconductivity by means of tunneling spectroscopy and phase-sensitive measurements, as well as for applied research aimed at developing coherent THz sources, ultra-sensitive detectors, and future supercomputers. The group is also actively involved in micro/nano-fabrication of such devices using modern clean-room facilities.
We focus on experimental studies of quantum phenomena in low-temperature physics, including fundamental studies of superconductivity and magnetism, as well as applied research aimed at developing future THz electronics and nanotechnology.
Group description
The key subjects of the Experimental Condensed Matter Physics Group are superconductivity and nanotechnology. Current research topics include:
- Development of vortex-based digital electronics for future supercomputers.
- Development of coherent THz sources and detectors based on arrays of Josephson junctions.
- Fundamental studies of high temperature superconductors (cuprates and iron-pnictides).
- Competition between superconductivity and magnetism in superconductor/ferromagnet hybrids.
- Non-equilibrium phenomena in superconducting multilayers
- Numerical analysis of Josephson junction dynamics.
Methodology and experimental techniques.
We make our samples using advanced sample engineering and micro/nano-fabrication in clean-room environment. The major part of the sample fabrication is made at the Nano-Fab Lab, a joint facility between KTH and Stockholm University, located here at AlbaNova University Center. We also have a cryogen-free, low-temperature lab, containing various
low-temperature, high magnetic field, and measurement equipment. The equipment is completed with high-frequency instrumentation and an optical cryostat.
Group members
Group managers
Vladimir Krasnov
Professor
Members
Razmik Hovhannisyan
PhD student
Roger Cattaneo
PhD student
Taras Golod
1:e forskningsingenjör
