×

Error message

  • Warning: count(): Parameter must be an array or an object that implements Countable in color_glass_table() (line 366 of /home/customer/www/sonciniresearchgroup.com/public_html/sites/all/themes/color_glass/includes/bootstrap.inc).
  • Deprecated function: implode(): Passing glue string after array is deprecated. Swap the parameters in Drupal\gmap\GmapDefaults->__construct() (line 107 of /home/customer/www/sonciniresearchgroup.com/public_html/sites/all/modules/gmap/lib/Drupal/gmap/GmapDefaults.php).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Notice: Trying to access array offset on value of type int in element_children() (line 6609 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
  • Deprecated function: implode(): Passing glue string after array is deprecated. Swap the parameters in drupal_get_feeds() (line 394 of /home/customer/www/sonciniresearchgroup.com/public_html/includes/common.inc).
TitleOrigin of the hysteresis of magnetoconductance in a supramolecular spin-valve based on a TbPc2 single-molecule magnet
Publication TypeJournal Article
Year of Publication2020
AuthorsHymas, K, Soncini, A
JournalPHYSICAL REVIEW B
Volume102
Pagination125310
Date PublishedSEP 29
ISSN2469-9950
Abstract
We present a time-dependent microscopic model for Coulomb blockade transport through an experimentally realized supramolecular spin-valve device driven by an oscillating magnetic field, in which the 4f-electron magnetic states of an array of TbPc2 single-molecule magnets (SMMs) were observed to modulate a sequential tunneling current through an underlying substrate nanoconstriction. Our model elucidates the dynamical mechanism at the origin of the observed hysteresis loops of the magnetoconductance, a signature of the SMM-modulated spin-valve effect, in terms of a phonon-assisted multi-spin-reversal cascade relaxation process, which mediates the switching of the device between the two conductive all-parallel spin configurations of the SMM array. Moreover, our proposed model can explain the zero-bias giant magnetoresistive transport gap measured in this device, solely within the incoherent transport regime, consistently with the experimental observations, as opposed to previous interpretations invoking Fano-resonance conductance suppression within a coherent ballistic transport regime. Finally, according to the proposed Coulomb blockade scenario, the SMM-mediated giant magnetoresistance effect is predicted to increase with the number of SMMs aligned on the nanoconstriction surface, on account of the increased number of intermediate nonconducting spin-flip states intervening in the phonon-assisted multi-spin-reversal cascade relaxation process necessary to switch between the two conducting all-parallel SMM spin configurations.
DOI10.1103/PhysRevB.102.125310
Library 
Soncini Group