skip to main content

Title: Efficient spin filter and spin valve in a single-molecule magnet Fe{sub 4} between two graphene electrodes

We propose a magnetic molecular junction consisting of a single-molecule magnet Fe{sub 4} connected two graphene electrodes and investigate transport properties, using the nonequilibrium Green's function method in combination with spin-polarized density-functional theory. The results show that the device can be used as a nearly perfect spin filter with efficiency approaching 100%. Our calculations provide crucial microscopic information how the four iron cores of the chemical structure are responsible for the spin-resolved transmissions. Moreover, it is also found that the device behaves as a highly efficient spin valve, which is an excellent candidate for spintronics of molecular devices. The idea of combining single-molecule magnets with graphene provides a direction in designing a new class of molecular spintronic devices.
Authors:
 [1] ;  [2] ; ; ; ;  [3] ; ;  [1]
  1. School of Science, Wuhan Institute of Technology, Wuhan 430205 (China)
  2. (China)
  3. School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074 (China)
Publication Date:
OSTI Identifier:
22486275
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 25; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DENSITY FUNCTIONAL METHOD; DESIGN; EFFICIENCY; ELECTRIC CONTACTS; ELECTRODES; FILTERS; GRAPHENE; GREEN FUNCTION; IRON; MAGNETS; MOLECULES; SEMICONDUCTOR JUNCTIONS; SPIN; SPIN ORIENTATION; SUPERCONDUCTING JUNCTIONS; TRANSMISSION