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Molecular Magnet: an Example of STM Application

C203 course. Molecular Magnet: an Example of STM Application. J. Wu Phys. Dept. Scanning Tunneling Microscope (STM). Small-scale STM. STM image of carbon nanotube. The tunneling current from the tip is given by. W is the barrier width, V is the voltage,

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Molecular Magnet: an Example of STM Application

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  1. C203 course Molecular Magnet: an Example of STM Application J. Wu Phys. Dept.

  2. Scanning Tunneling Microscope (STM) Small-scale STM STM image of carbon nanotube The tunneling current from the tip is given by W is the barrier width, V is the voltage, r is the local density of the sample.

  3. Molecular Magnet: an interdisciplinary field Molecular Beam Epitaxy (MBE) Under ultra high vacuum 1*10-10t, thermal heating CoPc source & sublimate it onto the substrate. Advantage: very clean Structure formula of CoPc Co atom carry magnetic moment.

  4. Molecular observation and modification

  5. 3D model of CoPc and d-CoPc CoPc d-CoPc

  6. Self-assembled multilayer CoPc

  7. Zeeman splitting under magnetic field

  8. Spin excitation of the molecular chain

  9. Summary STM is a wonderful tool to observe and manipulate the nano-world. Molecular magnet is an interesting field with many open questions.

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