Zobrazeno 1 - 10
of 449
pro vyhledávání: '"Hekking, F. W. J."'
Publikováno v:
Physical Review B 101 , 024518 (2020)
We study the zero-temperature phase diagram of a dissipationless and disorder-free Josephson junction chain. Namely, we determine the critical Josephson energy below which the chain becomes insulating, as a function of the ratio of two capacitances:
Externí odkaz:
http://arxiv.org/abs/1911.02817
Autor:
Krupko, Yu., Nguyen, V. D., Weißl, T., Dumur, É., Puertas, J., Naud, C., Hekking, F. W. J., Basko, D. M., Buisson, O., Roch, N., Hasch-Guichard, W.
Publikováno v:
Phys. Rev. B 98, 094516 (2018)
We present a detailed experimental and theoretical analysis of the dispersion and non-linear Kerr frequency shifts of plasma modes in a one-dimensional Josephson junction chain containing 500 SQUIDs in the regime of weak nonlinearity. The measured lo
Externí odkaz:
http://arxiv.org/abs/1807.01499
Publikováno v:
Phys. Rev. Lett. 121, 090404 (2018)
We study Josephson oscillations of two strongly correlated one-dimensional bosonic clouds separated by a localized barrier. Using a quantum-Langevin approach and the exact Tonks-Girardeau solution in the impenetrable-boson limit, we determine the dyn
Externí odkaz:
http://arxiv.org/abs/1712.06949
Giant mesoscopic fluctuations of the elastic cotunneling thermopower of a single-electron transistor
Publikováno v:
Phys. Rev. B 91, 085310 (2015)
We study the thermoelectric transport of a small metallic island weakly coupled to two electrodes by tunnel junctions. In the Coulomb blockade regime, in the case when the ground state of the system corresponds to an even number of electrons on the i
Externí odkaz:
http://arxiv.org/abs/1412.3326
Publikováno v:
Phys Rev B 91 (2015) 014507
We have measured the current-voltage characteristics of a Josephson junction with tunable Josephson energy $E_J$ embedded in an inductive environment provided by a chain of SQUIDs. Such an environment induces localization of the charge on the junctio
Externí odkaz:
http://arxiv.org/abs/1407.7728
Autor:
Vasenko, A. S., Kawabata, S., Ozaeta, A., Golubov, A. A., Stolyarov, V. S., Bergeret, F. S., Hekking, F. W. J.
Publikováno v:
J. Magn. Magn. Mater. 383, 175 (2015)
Ferromagnetic materials with exchange fields E_ex smaller or of the order of the superconducting gap Delta are important for applications of corresponding (s-wave) superconductor/ ferromagnet/ superconductor (SFS) junctions. Presently such materials
Externí odkaz:
http://arxiv.org/abs/1401.0646
Autor:
Basko, D. M., Hekking, F. W. J.
Publikováno v:
Phys. Rev. B 88, 094507 (2013)
We study the properties of the normal modes of a chain of Josephson junctions in the simultaneous presence of disorder and absorption. We consider the superconducting regime of small phase fluctuations and focus on the case where the effects of disor
Externí odkaz:
http://arxiv.org/abs/1307.8258
Publikováno v:
Physical Review B 88, 174507 (2013)
We consider a voltage-biased Normal metal-Insulator-Superconductor (NIS) tunnel junction, connected to a high-temperature external electromagnetic environment. This model system features the commonly observed subgap leakage current in NIS junctions t
Externí odkaz:
http://arxiv.org/abs/1307.5446
Autor:
Hekking, F. W. J., Pekola, J. P.
We apply the quantum jump approach to address the statistics of work in a driven two-level system coupled to a heat bath. We demonstrate how this question can be analyzed by counting photons absorbed and emitted by the environment in repeated experim
Externí odkaz:
http://arxiv.org/abs/1305.5207
Publikováno v:
J. Supercond. Nov. Magn. 26, 1951 (2013)
The Andreev current and the subgap conductance in a superconductor/ insulator/ ferromagnet (SIF) structure in the presence of a small spin-splitting field show novel interesting features (A. Ozaeta et al., Phys. Rev. B 86, 060509(R), 2012). For examp
Externí odkaz:
http://arxiv.org/abs/1208.4741