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pro vyhledávání: '"Ernst, Helmut"'
Akademický článek
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Autor:
Grosse Meininghaus, Dirk, Blembel, Kai, Waniek, Claudia, Kruells-Muench, Juergen, Ernst, Helmut, Kleemann, Tobias, Geller, J. Christoph
Publikováno v:
In Heart Rhythm June 2021 18(6):926-934
Autor:
Segev, Yehonathan, Myasoedov, Yuri, Zeldov, Eli, Tamegai, Tsuyoshi, Mikitik, Grigorii P., Brandt, Ernst Helmut
The local effect of the Josephson vortices on the vortex lattice melting process in \BSCCO crystals in the presence of an in-plane field $H_{ab}$ is studied by differential magneto-optical imaging. The melting process is found to commence along the J
Externí odkaz:
http://arxiv.org/abs/1110.6253
Autor:
Segev, Yehonathan, Gutman, Ilia, Goldberg, Sarah, Myasoedov, Yuri, Zeldov, Eli, Brandt, Ernst Helmut, Mikitik, Grigorii P., Katagiri, Takao, Sasagawa, Takao
Differential magneto-optics are used to study the effect of dc in-plane magnetic field on hysteretic behavior due to geometrical barriers in $Bi_2Sr_2CaCu_2O_{8+\delta}$ crystals. In absence of in-plane field a vortex dome is visualized in the sample
Externí odkaz:
http://arxiv.org/abs/1102.1071
Autor:
Brandt, Ernst Helmut
The electric losses in a bulk or film superconductor exposed to a parallel radio-frequency magnetic field may have three origins: In homogeneous vortex-free superconductors losses proportional to the frequency squared originate from the oscillating n
Externí odkaz:
http://arxiv.org/abs/1008.2231
Autor:
Brandt, Ernst Helmut, Das, Mukunda P.
The magnetic vortices in superconductors usually repel each other. Several cases are discussed when the vortex interaction has an attractive tail and thus a minimum, leading to vortex clusters and chains. Decoration pictures then typically look like
Externí odkaz:
http://arxiv.org/abs/1007.1107
Autor:
Brandt, Ernst Helmut
The properties of vortices in superconducting thin films are revisited. The interaction between two Pearl vortices in an infinite film is approximated at all distances by a simple expression. The interaction of a vortex with a regular lattice of real
Externí odkaz:
http://arxiv.org/abs/0904.1436
Publikováno v:
Phys. Rev. B 79, 174510 (2009)
Electrostatic charging changes the critical temperature of superconducting thin layers. To understand the basic mechanism, it is possible to use the Ginzburg-Landau theory with the boundary condition derived by de Gennes from the BCS theory. Here we
Externí odkaz:
http://arxiv.org/abs/0901.4244
Akademický článek
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Publikováno v:
Phys. Rev. B 78, 174516 (2008)
Interaction of the superconducting condensate with deformations of the crystal lattice is formulated assuming the electrostatic potential of Bernoulli type and the effect of strain on material parameters. In the isotropic approximation it is shown th
Externí odkaz:
http://arxiv.org/abs/0806.3660