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Controlled spin switching in a metallocene molecular junction.

M Ormaza1, P Abufager2, B Verlhac3

  • 1Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000, Strasbourg, France. ormaza@ipcms.unistra.fr.

Nature Communications
|December 8, 2017
PubMed
Summary
This summary is machine-generated.

Researchers actively control molecular spin by altering the molecule/metal interface. A nickelocene molecule switches spin states between 1 and 1/2 by adjusting electrode distance, demonstrating precise control for molecular spintronics.

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Area of Science:

  • Molecular spintronics
  • Quantum chemistry
  • Surface science

Background:

  • Controlling molecular spin is crucial for molecular spintronics.
  • Current methods involve chemical doping or external stimuli.
  • Molecular spin is influenced by substrate interactions.

Purpose of the Study:

  • To demonstrate active control of a single molecule's spin state.
  • To investigate spin manipulation via interface engineering.
  • To explore spin switching in nickelocene molecules.

Main Methods:

  • Utilizing a low-temperature scanning tunneling microscope (STM).
  • Modifying the molecule/metal interface by varying electrode distance.
  • Conducting inelastic and elastic electron tunneling spectroscopy.
  • Performing first-principles calculations.

Main Results:

  • A single nickelocene molecule reversibly switched spin from 1 to 1/2.
  • Spin switching occurred by transitioning the electrode-electrode gap from tunnel to contact.
  • Reproducible conductance measurements showed spin-flip mechanisms.
  • First-principles calculations supported the experimental observations.

Conclusions:

  • Interface manipulation provides active control over single-molecule spin states.
  • This method offers a new pathway for designing molecular spintronic devices.
  • Demonstrated reversible spin switching in nickelocene through controlled interface modification.