Nanoengineered superconductivity and vortex dynamics

The two key cases of nondissipating motion in nature are the propagation of light (and other electromagnetic waves) in vacuum and the flow of electrical current in superconductors. In the second case, the energy dissipation is forbidden by the existence of a coherent quantum state of the condensate of electric charge carries (Cooper pairs). While propagating light interacts with matter and gravitational waves and represents the basis for optical and photonic devices, the frictionless flow of supercurrent interferes with nanosize objects in the superconductor such as tunnel barriers, surfaces, or the so-called fluxons (vortices) which are quantized magnetic flux tubes induced by an applied current, a magnetic field, or fluctuations.

Publications

  • Ultra-fast vortex motion in a direct-write Nb-C superconductor
    O. V. Dobrovolskiy, D. Yu. Vodolazov, F. Porrati, R. Sachser, V. M. Bevz, M. Yu. Mikhailov, A. V. Chumak, and M. Huth
    Nat. Commun. 11, 3291 (2020)
  • Vortices and non-equilibrium phenomena in superconductors
    O.V. Dobrovolskiy and A.I. Bezuglyj (Guest Editors)
    Low Temp. Phys. 46, 307-308 (2020)
  • Moving flux quanta cool superconductors by a microwave breath 
    O. V. Dobrovolskiy, C. Gonzalez-Ruano, A. Lara, R. Sachser, V. M. Bevz, V. A. Shklovskij, A. I. Bezuglyj, R. V. Vovk, M. Huth, and F. G. Aliev
    Commun. Phys. 3, 64 (2020)
  • Upper frequency limits for vortex guiding and ratchet effects
    O. V. Dobrovolskiy, E. Begun, V. M. Bevz, R. Sachser, and M. Huth
    Phys. Rev. Appl. 13, 024012 (2020)
  • Different single photon response of wide and narrow superconducting MoSi strips
    Yu. P. Korneeva, N. N. Manova, I. N. Florya, M. Yu. Mikhailov, O. V. Dobrovolskiy, A. A. Korneev, D. Yu. Vodolazov 
    Phys. Rev. Appl. 13, 024011 (2020)
  • Fast dynamics of guided magnetic flux quanta
    O. V. Dobrovolskiy, V. M. Bevz, E. Begun, R. Sachser, R. V. Vovk, and M. Huth,
    Phys. Rev. Appl. 11, 054064 (2019)
  • Local flux-flow instability in superconducting films near Tc
    A. I. Bezuglyj, V. A. Shklovskij, R. V. Vovk, V. M. Bevz, M. Huth, and O. V. Dobrovolskiy,
    Phys. Rev. B 99, 174518 (2019) 
  • Microwave radiation detection with an ultra-thin and free standing superconducting niobium nano-helix
    S. Lösch, A. Alfonsov, O. V. Dobrovolskiy, R. Keil, V. Engemaier, S. Baunack, G. Li, O. G. Schmidt, and D. Bürger,
    ACS Nano 13, 2948 (2019)
  • Reduction of microwave loss by mobile fluxons in grooved Nb films
    O. V. Dobrovolskiy, R. Sachser, V. M. Bevz, A. Lara, F. G. Aliev, V. A. Shklovskij, A. I. Bezuglyj, R. V. Vovk, and M. Huth,
    Phys. Stat. Sol. - Rap. Res. Lett. 13, 1800223 (2019)
  • Microwave emission from superconducting vortices in Mo/Si superlattices
    O. V. Dobrovolskiy, V. M. Bevz, M. Yu. Mikhailov, O. I. Yuzephovich, V. A. Shklovskij, R. V. Vovk, M. I. Tsindlekht, R. Sachser, and M. Huth,
    Nature Commun. 9, 4927 (2018)
  • Radiofrequency generation by coherently moving fluxons
    O. V. Dobrovolskiy, R. Sachser, M. Huth, V. A. Shklovskij, R. V. Vovk, V. M. Bevz, and M. Tsindlekht,
    Appl. Phys. Lett. 112, 152601 (2018)