A bipodal dicyano anchor unit for single-molecule spintronic devices

Yuta Tsuji, Takayuki Semoto, Kazunari Yoshizawa

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


The conductance through single 7,7,8,8-tetracyanoquinodimethane (TCNQ) connected to gold electrodes is studied with the nonequilibrium Green's function method combined with density functional theory. The aim of the study is to derive the effect of a dicyano anchor group, =C(CN)2, on energy level alignment between the electrode Fermi level and a molecular energy level. The strong electron-withdrawing nature of the dicyano anchor group lowers the LUMO level of TCNQ, resulting in an extremely small energy barrier for electron injection. At zero bias, electron transfer from electrodes easily occurs and, as a consequence, the anion radical state of TCNQ with a magnetic moment is formed. The unpaired electron in the TCNQ anion radical causes an exchange splitting between the spin-α and spin-β transmission spectra, allowing the single TCNQ junction to act as a spin-filtering device.

Original languageEnglish
Pages (from-to)2470-2475
Number of pages6
Issue number11
Publication statusPublished - Aug 5 2013

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry


Dive into the research topics of 'A bipodal dicyano anchor unit for single-molecule spintronic devices'. Together they form a unique fingerprint.

Cite this