Chalmers University of Technology
About
Chalmers University of Technology in Göteborg (Sweden) conducts research and education in technology and natural sciences at a high international level. With scientific excellence as a basis, Chalmers promotes knowledge and technical solutions for a sustainable world. Through global commitment and entrepreneurship, we foster an innovative spirit, in close collaboration with wider society.Chalmers was founded in 1829 and has the same motto today as it did then: Avancez – forward.
About Chalmers University of Technology
The Department of Microtechnology and Nanoscience (MC2) at Chalmers University of Technology has gathered diverse competence to form a unique research environment in the areas of nano- and quantum electronics, photonics, bio- and nano systems. Today MC2 is a strong contributor to industrial growth and technical and social development. The cross-disciplinary strategy gives interesting collaborations with Swedish and international partners within academy, industry and society, and is a driving force for innovations, results and breakthroughs. At the Quantum Device Physics Division (QDP), we exploit the charge, spin, orbital and lattice degrees of freedom in materials that we design and produce, to explore fundamental questions in condensed matter physics and to develop new concepts in device physics. Our research covers a variety of topics at the forefront of condensed matter physics, extending from ab-initio calculations to experiments with nanodevices consisting of emerging 2D materials and van der Waals heterostructures, topological Dirac and Weyl materials, semiconductors, oxide heterostructures, nanomagnets, and superconductors.
Applications and utilization of our research can be found in quantum metrology, topological quantum technology, thermoelectrics, quantum theory, radio astronomy, medical instrumentation, and spintronics. Our teaching covers undergraduates, MSc and specialized PhD courses and includes general physics, condensed matter physics, nanoscience and nanofabrication, semiconductor and superconducting physics, to name a few.
About our team
Our team specializes on Quantum Materials which bring together a variety of phenomena at the border between physics, material science and engineering. The properties of these systems are uniquely defined by quantum mechanical effects which persist at high temperatures and macroscopic length scales. Some examples are unconventional superconductors, topological insulators, Weyl semimetals.
We focus on nanodevices, which are fabricated in the cleanroom of our department at Chalmers using state of the art tools. Quantum materials in form of nanobelts, heterostructures and very thin films are nanopatterned to study basic physics effects and to realize a variety of quantum limited sensors. Examples are SQUIDs, single photon detectors and charge pump. Dimensions down to 10 nm are achieved. The transport in quantum materials is investigated in our measurement lab via: electric resistivity as a function of temperature (down to 20 mK) and magnetic field (up to 12 T); RF and microwave measurements; Magnetic field/flux sensing; Hall measurements and high voltage gating effects.
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Key members
Floriana Lombardi (PI)
Thilo Bauch (Research scientist)
Alexei Kalaboukhov (Research scientist)
Key equipments of our lab
UHV Pused Laser Deposition system the deposition of high quality YBCO thin films connected to a cluster of 3 deposition modules with a common transfer and loading system. Both loading of substrates and exchange of targets is possible at UHV.
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Electron Beam Lithography – JEOL JBX 9300FS: High resolution electron beam lithography system. Acceleration voltage 100 kV, beam spotsize 4 nm – 100 nm.
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Cryogen free dilution refrigerator with base temperature of 18 mK and persistent magnetic field up to 12 T. For the electrical characterization of nano devices, the fridge is equipped with 48 DC lines. π- and RC- filters at room temperature and at the 4 K stage, respectively, to reduce noise from 200 kHz up to 1 GHz. Metal powder filters at the mixing chamber dissipate microwave radiation at 1 GHz and above for proper thermalization of charge carriers/electrons in nano devices. For microwave characterization of quantum circuits 12 coaxial microwave lines and 2 cryogenic low noise amplifiers (4-8 GHz) at the 4 K stage are available.
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3He dipstick with base temperature of 300 mK for fast turnaround low temperature characterization of quantum devices. The system is equipped with a small solenoid suppling magnetic fields up to 30 mT. 44 DC lines allow the characterization of several devices during a single cool down.
