Dr Sergey Kafanov

Lecturer in Experimental Condensed Matter Physics

PhD Supervision Interests

We are seeking PhD students to study quantum phenomena in superconducting and hybrid devices. Due to their unique properties, such devices allow the control at the level of single charge or flux quantum, single photon and single phonon, and are promising for applications in sensing, metrology and quantum information processing. Examples of research projects include, but are not limited to: 1. Charge pumping by nanoelectronic hybrid circuits 2. Detection of the quantum of mechanical motion by an artificial atom 3. Interaction of surface acoustic waves with a superconducting artificial atom 4. Probing quantum fluids with nanomechanical resonators The work is experimental and involves nanofabrication of superconducting and hybrid circuits in the Quantum Technology Centre's cleanroom and measurements at mK temperatures in a dilution refrigerator. We work in close collaboration with the ULT group. We also collaborate with theorists, both at Lancaster and abroad. You are expected to have a strong interest and preferably knowledge in some of the fields: - quantum physics, superconductivity and superfluidity, Josephson junction devices, Coulomb blockade, quantum optics and quantum information; - low-noise measurements and microwave engineering; - automation of the experiment, data acquisition using Python or MatLab; - cryogenic techniques.

Insulating Josephson-junction chains as pinned Luttinger liquids
Cedergren, K., Ackroyd, R., Kafanov, S., Vogt, N., Shnirman, A., Duty, T. 20/10/2017 In: Physical Review Letters. 119, 16, p. 167701. 5 p.
Journal article

Operating nanobeams in a quantum fluid
Bradley, D.I., George, R.E., Guénault, A.M., Haley, R.P., Kafanov, S., Noble, T., Pashkin, Y., Pickett, G.R., Poole, M., Prance, J.R., Sarsby, M., Schanen, R., Tsepelin, V., Wilcox, T., Zmeev, D. 7/07/2017 In: Scientific Reports. 7, 4876, 8 p.
Journal article

Probing liquid 4He with quartz tuning forks using a novel multifrequency lock-in technique
Bradley, D.I., Haley, R.P., Kafanov, S., Noble, T., Pickett, G.R., Tsepelin, V., Vonka, J., Wilcox, T. 09/2016 In: Journal of Low Temperature Physics. 184, 5, p. 1080-1091. 12 p.
Journal article

Parity effect and single-electron injection for Josephson junction chains deep in the insulating state
Cedergren, K., Kafanov, S., Smirr, J.-., Cole, J.H., Duty, T. 21/09/2015 In: Physical Review B. 92, 10, 7 p.
Journal article

A planar Al-Si Schottky barrier metal-oxide-semiconductor field effect transistor operated at cryogenic temperatures
Purches, W.E., Rossi, A., Zhao, R., Kafanov, S., Duty, T.L., Dzurak, A.S., Rogge, S., Tettamanzi, G.C. 12/08/2015 In: Applied Physics Letters. 107, 6, 5 p.
Journal article

Single flux transistor: the controllable interplay of coherent quantum phase slip and flux quantization
Kafanov, S., Chtchelkatchev, N.M. 21/08/2013 In: Journal of Applied Physics. 114, 7, 4 p.
Journal article

Single-electron devices with a mechanical degree of freedom
Pashkin, Y.A., Pekola, J.P., Knyazev, D.A., Li, T.F., Kafanov, S., Astafiev, O., Tsai, J.S. 2012 In: Journal of Physics: Conference Series. 400, PART 5, 6 p.
Journal article

Radio-frequency transport of single electrons in superconductor-normal- metal tunnel junctions and the quantum metrological triangle
Kemppinen, A., Maisi, V.F., Saira, O.P., Kafanov, S., Lotkhov, S.V., Pashkin, Y.A., Aref, T., Meschke, M., Möttönen, M., Hahtela, O., Hassel, J., Luomahaara, J., Mykkänen, E., Koivula, H., Averin, D.V., Seppä, H., Tsai, J.S., Zorin, A.B., Manninen, A., Pekola, J.P. 2011 In: 2011 30th URSI General Assembly and Scientific Symposium, URSIGASS 2011. IEEE 4 p. ISBN: 9781424451173.
Conference contribution

Hybrid single-electron turnstile: towards a quantum standard of electric current
Pekola, J.P., Averin, D.V., Kafanov, S., Kemppinen, A., Lotkhov, S.V., Maisi, V.F., Meschke, M., Mottonen, M., Pashkin, Y.A., Saira, O.-., Tsai, J.S., Zorin, A.B. 13/06/2010 In: Precision Electromagnetic Measurements (CPEM), 2010 Conference on. IEEE p. 88-88. 1 p.
Conference contribution

Development of the SINIS turnstile for the quantum metrological triangle
Kemppinen, A., Kafanov, S., Maisi, V.F., Pashkin, Y.A., Lotkhov, S.V., Chekurov, N., Saira, O.P., Möttönen, M., Hassel, J., Tsai, J.S., Averin, D.V., Zorin, A.B., Manninen, A.J., Pekola, J.P. 2010 In: 2010 Conference on Precision Electromagnetic Measurements, CPEM 2010. IEEE p. 125-126. 2 p. ISBN: 9781424467952.
Conference contribution

Pumping properties of the hybrid single-electron transistor in dissipative environment
Lotkhov, S.V., Kemppinen, A., Kafanov, S., Pekola, J.P., Zorin, A.B. 11/2009 In: Applied Physics Letters. 95, 11, 3 p.
Journal article

Measurement of the shot noise in a single-electron transistor
Kafanov, S., Delsing, P. 19/10/2009 In: Physical Review B. 80, 15, 5 p.
Journal article

Periodicity in Al/Ti superconducting single electron transistors
MacLeod, S.J., Kafanov, S., Pekola, J.P. 10/2009 In: Applied Physics Letters. 95, 5, 3 p.
Journal article

Charge noise in single-electron transistors and charge qubits may be caused by metallic grains
Kafanov, S., Brenning, H., Duty, T., Delsing, P. 17/09/2008 In: Physical Review B. 78, 12, 7 p.
Journal article

Electronic transport in single molecule junctions: control of the molecule-electrode coupling through intramolecular tunneling barriers
Danilov, A., Kubatkin, S., Kafanov, S., Hedegård, P., Stuhr-Hansen, N., Moth-Poulsen, K., Bjørnholm, T. 01/2008 In: Nano Letters. 8, 1, p. 1-5. 5 p.
Journal article

An ultrasensitive radio-frequency single-electron transistor working up to 4.2 K
Brenning, H., Kafanov, S., Duty, T., Kubatkin, S., Delsing, P. 13/12/2006 In: Journal of Applied Physics. 100, 11, 4 p.
Journal article

Electron transfer dynamics of bistable single-molecule junctions
Danilov, A.V., Kubatkin, S.E., Kafanov, S., Flensberg, K., Bjørnholm, T. 10/2006 In: Nano Letters. 6, 10, p. 2184-2190. 7 p.
Journal article

A single electron transistor on an atomic force microscope probe
Brenning, H.T.A., Kubatkin, S.E., Erts, D., Kafanov, S., Bauch, T., Delsing, P. 05/2006 In: Nano Letters. 6, 5, p. 937-941. 5 p.
Journal article

Strong electronic coupling between single C60 molecules and gold electrodes prepared by quench condensation at 4 K. A single molecule three terminal device study
Danilov, A.V., Kubatkin, S.E., Kafanov, S., Bjørnholm, T. 2006 In: Faraday Discussions. 131, p. 337-345. 9 p.
Journal article

Single molecular devices with fullerenes and OligoPhenyleneVinylene (OPV) derivatives
Danilov, A.V., Kafanov, S., Bjørnholm, T., Kubatkin, S.E. 2005 In: IEEE International Electron Devices Meeting, 2005 IEDM - Technical Digest. p. 467-470. 4 p. ISBN: 078039268X, 9780780392687.
Conference contribution

Structure and dynamics of the He-2(*) (a3 Sigma(+)(u)) molecular complex in condensed phases of helium
Kafanov, S., Parshin, A.Y., Todoshchenko, I.A. 11/2000 In: Journal of Experimental and Theoretical Physics. 91, 5, p. 991-999. 9 p.
Journal article

Optical spectra of the triplet He-2* excitations in various phases of liquid He-3 and He-4 under high pressures
Parshin, A.Y., Todoshchenko, I.A., Kafanov, S. 07/2000 In: Physica B: Condensed Matter. 284-288, Part 1, p. 91-92. 2 p.
Journal article