Designing bifuncitonal molecular devices with a metalloporphyrin dimer

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Ying Xia
  • Ling Shuai
  • Yiping Wang
  • Yao Ma
  • Lingyun Han
  • Ming Qiu
  • Zhenhua Zhang

Detail(s)

Original languageEnglish
Pages (from-to)4080-4085
Journal / PublicationPhysical Chemistry Chemical Physics
Volume22
Issue number7
Publication statusPublished - 21 Feb 2020

Abstract

Many organic molecules have unique magnetic properties and can potentially serve as excellent molecular spin devices, which is worth exploring deeply. Here, the spin transport properties of Mn, Fe, Co and Cu porphyrin dimer devices are investigated based on the first principles method. The spin filtering efficiencies of these molecular devices are maintained at 100% within certain applied voltage ranges and magnetoresistance ratios are higher than 108% which increase as the voltage increases. To explain the excellent spin-filtering and giant magnetoresistance effects, analysis of spin electron densities and transmission spectra indicates that magnetic properties are mainly contributed by the metal atoms and their neighbouring N atoms. From the transmission pathway studies, spin electrons come mainly through the π-conjugated structure of the metal porphyrin ring. Interestingly, in the Cu porphyrin dimer device, magnetic moments of the Cu-N structure in the Cu porphyrin dimer device show spin behaviors different from those of Mn, Fe and Co porphyrin dimer devices.

Research Area(s)

  • SPIN TRANSPORT-PROPERTIES, GIANT MAGNETORESISTANCE, DIFFERENTIAL RESISTANCE, PORPHYRIN, CONDUCTANCE, SYMMETRY, TETRAPHENYLPORPHYRIN, NANORIBBONS, JUNCTION, SENSOR

Citation Format(s)

Designing bifuncitonal molecular devices with a metalloporphyrin dimer. / Xia, Ying; Shuai, Ling; Wang, Yiping; Ma, Yao; Han, Lingyun; Qiu, Ming; Zhang, Zhenhua; Leung, Michael K. H.

In: Physical Chemistry Chemical Physics, Vol. 22, No. 7, 21.02.2020, p. 4080-4085.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review