54 citations · 310 across the 18 of their papers we have counts for
18 papers · 1 filter
Vortex flow anisotropy in nematic superconductors
F. Castillo Menegotto, R. S. Severino, P. D. Mininni +4
We investigate the vortex flow anisotropy in the mixed state of nematic superconductors, focusing on the effects of nematic-superconducting coupling on vortex dynamics. Using numer…
A Ginzburg-Landau approach to the vortex-domain wall interaction in superconductors with nematic order
Ramiro Severino, Pablo Mininni, Eduardo Fradkin +3
In this work we study the interaction between vortices and nematic domain walls within the framework of a Ginzburg Landau approach. The free energy of the system is written in term…
Vortices in a Ginzburg Landau Theory of Superconductors with Nematic Order
Ramiro Sebastián Severino, Pablo Daniel Mininni, Eduardo Fradkin +3
In this work we explore the interplay between superconductivity and nematicity in the framework of a Ginzburg Landau theory with a nematic order parameter coupled to the supercondu…
Nematicity in the superconducting mixed state of strain detwinned underdoped
J. Schmidt, V. Bekeris, G. S. Lozano +6
Evidence of nematic effects in the mixed superconducting phase of slightly underdoped is reported. We have found strong in-plan…
Metastability and hysteretic vortex pinning near the order-disorder transition in NbSe: An interplay between plastic and elastic energy barriers?
M. Marziali Bermúdez, E. R. Louden, M. R. Eskildsen +3
We studied thermal and dynamic history effects in the vortex lattice (VL) near the order-disorder transition in clean NbSe single crystals. Comparing the evolution of the effec…
Dynamic reorganization of vortex matter into partially disordered lattices
M. Marziali Bermúdez, M. R. Eskildsen, M. Bartkowiak +3
We report structural evidence of dynamic reorganization in vortex matter in clean NbSe by joint small angle neutron scattering and ac-susceptibility measurements. The applicati…
Vortex pinning vs superconducting wire network: origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets
A. Gomez, J. del Valle, E. M. Gonzalez +6
Hybrid magnetic arrays embedded in superconducting films are ideal systems to study the competition between different physical (such as the coherence length) and structural length…
Dynamics of superconducting vortices driven by oscillatory forces in the plastic flow regime
D. Pérez Daroca, G. Pasquini, G. S. Lozano +1
We study experimentally and theoretically, the reorganization of superconducting vortices driven by oscillatory forces near the plastic depinning transition. We show that the syste…
Depinning and dynamics of AC driven vortex lattices in random media
D. Perez Daroca, G. S. Lozano, G. Pasquini +1
We study the different dynamical regimes of a vortex lattice driven by AC forces in the presence of random pinning via numerical simulations. The behaviour of the different observa…
Ordered, disordered and coexistent stable vortex lattices in NbSe_2 single crystals
G. Pasquini, D. Perez Daroca, C. Chiliotte +2
It is commonly accepted that the peak effect (PE) in the critical current density of type II superconductors is a consequence of an order-disorder transition in the vortex lattice…
Peak effect in YBCO crystals: Statics and dynamics of the vortex lattice
G. Pasquini, V. Bekeris
Oscillatory dynamics and quasi-static Campbell regime of the vortex lattice (VL) in twinned YBa2Cu3O7 single crystals has been explored at low fields near the peak effect (PE) regi…
Oscillatory dynamics of a superconductor vortex lattice in high amplitude ac magnetic fields
A. J. Moreno, S. O. Valenzuela, G. Pasquini +1
In this work we study by ac susceptibility measurements the evolution of the solid vortex lattice mobility under oscillating forces. Previous work had already shown that in YBCO si…
Elastic-to-plastic crossover below the peak effect in the vortex solid of YBa2Cu3O7 single crystals
Sergio O. Valenzuela, Boris Maiorov, Eduardo Osquiguil +1
We report on transport and ac susceptibility studies below the peak effect in twinned YBa2Cu3O7 single crystals. We find that disorder generated at the peak effect can be partially…
History effects and pinning regimes in solid vortex matter
Sergio O. Valenzuela, Victoria Bekeris
We propose a phenomenological model that accounts for the history effects observed in ac susceptibility measurements in YBa2Cu3O7 single crystals [Phys. Rev. Lett. 84, 4200 (2000)…
Oscillatory dynamics and organization of the vortex solid in YBa2Cu3O7 single crystals
S. O. Valenzuela, V. Bekeris
We report on the degree of order of the vortex solid in YBa2Cu3O7 single crystals observed in ac susceptibility measurements. We show that when vortices are "shaken" by a temporari…
Time resolved nanosecond vortex dynamics in high Tc superconducting films
H. Ferrari, D. Ibaceta, V. Bekeris +2
We report on the observation of the rearrangement of vortices in the ns time scale following a fast magnetic field variation due to selective local heating of a high Tc superconduc…
Plasticity and memory effects in the vortex solid phase of twinned YBa2Cu3O7 single crystals
Sergio O. Valenzuela, Victoria Bekeris
We report on marked memory effects in the vortex system of twinned YBa2Cu3O7 single crystals observed in ac susceptibility measurements. We show that the vortex system can be trapp…
AC susceptibility in deoxygenated YBCO single crystals
A. J. Moreno, V. Bekeris
We measured the first and third harmonic of the complex AC susceptibility in YBCO single crystals with different oxygen content. The amplitude of the AC field was varied in presenc…