Selected Publications
- Slippage and Boundary Layer Probed in an Almost Ideal Gas by a Nanomechanical Oscillator
M. Defoort et al., Phys. Rev. Lett. 113, 136101 (2014) - Evidence for the role of normal-state electrons in nanoelectromechanical damping mechanisms at very low temperatures
K.J. Lulla et al., Phys. Rev. Lett. 110, 177206 (2013) - Phase Diagram of the Topological Superfluid 3He Confined in a Nanoscale Slab Geometry
L.V. Levitin et al., Science 340, 841-844 (2013) - Energy and angular momentum balance in wall-bounded quantum turbulence at very low temperatures
J.J. Hosio et al., Nature Commun. 4, 1614 (2013) - Evidence for Helical Nuclear Spin Order in GaAs Quantum Wires
C.P. Scheller et al., Phys. Rev. Lett. 112, 066801 (2013) - Observation of a roton collective mode in a two-dimensional Fermi liquid
H. Godfrin et al., Nature 483, 576 (2012) - The Josephson heat interferometer
F. Giazotto, M.J. Martinez-Perez, Nature 492, 401 (2012)
Coherent flux tunneling through NbN nanowires
J. T. Peltonen, O. V. Astafiev, Yu. P. Korneeva, B. M. Voronov, A. A. Korneev, I. M. Charaev, A. V. Semenov, G. N. Golt'sman, L. B. Ioffe, T. M. Klapwijk and J. S. TsaiWe demonstrate evidence of coherent magnetic flux tunneling through superconducting nanowires patterned in a thin highly disordered NbN film. The phenomenon is revealed as a superposition of flux states in a fully metallic superconducting loop with the nanowire acting as an effective tunnel barrier for the magnetic flux, and reproducibly observed in different wires. The flux superposition achieved in the fully metallic NbN rings proves the universality of the phenomenon previously reported for InOx. We perform microwave spectroscopy and study the tunneling amplitude as a function of the wire width, compare the experimental results with theories, and estimate the parameters for existing theoretical models.
Phys. Rev. B 88, 220506 (2013)
doi: 10.1103/PhysRevB.88.220506