|   | 
Details
   web
Records
Author (up) Shalóm, D. E.; Pastoriza, H.
Title Vortex motion rectification in Josephson junction arrays with a ratchet potential Type Journal Article
Year 2005 Publication Phys. Rev. Lett. Abbreviated Journal
Volume 94 Issue 17 Pages 177001
Keywords
Abstract By means of electrical transport measurements we have studied the rectified motion of vortices in ratchet potentials engineered on over-damped Josephson junction arrays. The rectified voltage as a function of the vortex density shows a maximum efficiency close a matching condition to the period of the ratchet potential indicating a collective vortex motion. Vortex current reversals where detected varying the driving force and vortex density revealing the influence of vortex-vortex interaction in the ratchet effect.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ hernan @ shalom05 Serial 45
Permanent link to this record
 

 
Author (up) Shalóm, D. E.; Pastoriza, H.
Title Experimental Method to Measure Anisotropic Transport in 2D Superconductors Type Journal Article
Year 2004 Publication Journal of Low Temperature Physics Abbreviated Journal
Volume 135 Issue Pages 153-156
Keywords
Abstract A two-coil kinetic inductance technique for measuring anisotropic response in two-dimensional (2D) superconductors is presented. Serpentine-shaped coils are lithographically patterned directly on top of the sample, separated by isolation layers. The drive and receive coils are positioned in a way that enhances signal from longitudinal currents and reduces transversal ones, maximizing the ratio. Anisotropic transport can be directly measured with this technique, even when anisotropy is induced by the transport current.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ hernan @ shalom04a Serial 43
Permanent link to this record
 

 
Author (up) Shalóm, D. E.; Pastoriza, H.
Title Experimental evidence for anisotropic response of a driven vortex lattice Type Journal Article
Year 2003 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 126 Issue 7 Pages 379-383
Keywords
Abstract We present kinetic inductance measurements in current driven Josephson junction arrays. Measurements performed with circular coils indicate that this technique is very sensitive to the vortex mobility. Results obtained with anisotropic detection coils provide experimental evidence for the anisotropic response of a driven vortex lattice. Anisotropic behavior is obtained when rising the temperature or the mean vortex velocity as indicated by the loss of the superconducting shielding capability, first in the direction of vortex motion and then in the perpendicular direction.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ hernan @ shalom03 Serial 42
Permanent link to this record
 

 
Author (up) Shalóm, D. E.; Reparáz, S.; Pastoriza, H.
Title Finite Josephson junction arrays with open boundaries in magnetic field: Ground state energy and first critical field Type Journal Article
Year 2004 Publication The European Physical Journal B – Condensed Matter Abbreviated Journal
Volume 40 Issue Pages 409-413
Keywords
Abstract We have investigated the size dependence of the ground state energy as a function of the magnetic field in Josephson junction arrays with open boundaries. We present a simple rings model that reproduces with great confidence the size and field dependence of the energy of the system obtained by numerical simulation of the Hamiltonian. From these results we obtained the size dependence of the first penetration field, where the one-vortex state becomes favorable compared to the zero-vortex state.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ hernan @ shalom04b Serial 44
Permanent link to this record