RT Journal Article
T1 Vortex ratchet reversal: Role of interstitial vortices
A1 Pérez de Lara, David
A1 Erekhinsky, M.
A1 González Herrera, Elvira María
A1 Rosen, Y. J.
A1 Schuller, Ivan K.
A1 Vicent López, José Luis
AB Triangular arrays of Ni nanotriangles embedded in superconducting Nb films exhibit unexpected dynamical vortex effects. Collective pinning with a vortex-lattice configuration different from the expected fundamental triangular "Abrikosov state" is found. The vortex motion, which prevails against the triangular periodic potential, is produced by channeling effects between triangles. Interstitial vortices coexisting with pinned vortices in this asymmetric potential lead to ratchet reversal, i.e., a dc output voltage that changes sign with the amplitude of an applied alternating drive current. In this landscape, ratchet reversal is always observed at all magnetic fields (all numbers of vortices) and at different temperatures. The ratchet reversal is unambiguously connected to the presence of two locations for the vortices: interstitial and above the artificial pinning sites.
PB American Physical Society
SN 1098-0121
YR 2011
FD 2011-05-09
LK https://hdl.handle.net/20.500.14352/42675
UL https://hdl.handle.net/20.500.14352/42675
LA eng
NO ©2011 American Physical Society.Research at UCSD was funded by the US-NSF and support at UCM was provided by Spanish Ministerio Ciencia e Innovacion Grant No. FIS2008-06249 (Grupo Consolidado),  Consolider CSD2007-00010, CAM Grant No. S2009/MAT-1726, and Santander-UCM Grant No. GR35/10-A, Imdeananoscience. We Thank S. Bar-Ad And Y. Bruynseraede For Useful Conversations.
NO Ministerio de Ciencia e Innovación (MICINN)
NO Comunidad de Madrid
NO US-NSF
NO Universidad Complutense de Madrid/Banco de Santander
DS Docta Complutense
RD 2 may 2024