Exploring Possible Magnetic Properties of Ordered Manganese Monolayer on Wurtzite GaN

ORAL

Abstract

For future spin-based device technologies, it is crucial to investigate magnetic material systems using techniques having high magnetic resolution. Spin-polarized scanning tunneling microscopy has proven to be extremely powerful for resolving magnetic structure down to even the atomic scale. Of great interest lately are transition-metal-on-semiconductor systems. We have recently discovered a well-ordered Mn monolayer having $\surd $3$\times \surd $3-R30$^{o}$ structure, formed on wurtzite gallium nitride.[1] It is intriguing to explore the possibility of atomic-scale magnetic ordering in this system. For this purpose, we have designed a new SP-STM system combined with a highly flexible, epitaxial nitride growth facility. The new SP-STM has been designed for variable-low-temperature operation within an applied magnetic field of up to +/- 4.5 Tesla. Initial results with the new system are expected within the very near future. Work is supported by DOE (Grant No.DE-FG02-06ER46317) and NSF (Grant No. 0730257). Equipment support from ONR is also acknowledged. [1] A. Chinchore et al., Appl. Phys. Lett. \textbf{93(18)}, 181908 (2008).

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Authors

  • A.R. Smith

    • Nanoscale and Quantum Phenomena Institute, Department of Physics and Astronomy, Ohio University, Athens, OH 45701
    • Ohio University
    • Department of Physics and Astronomy, Ohio University
    • Nanoscale and Quantum Phenomena Institute, Department of Physics \& Astronomy, Ohio University, Athens, OH 45701

  • A. Chinchore

    • Nanoscale and Quantum Phenomena Institute, Department of Physics and Astronomy, Ohio University, Athens, OH 45701
    • Ohio University
    • Nanoscale and Quantum Phenomena Institute, Department of Physics \& Astronomy, Ohio University, Athens, OH 45701

  • K. Wang

    • Nanoscale and Quantum Phenomena Institute, Department of Physics and Astronomy, Ohio University, Athens, OH 45701
    • Department of Physics and Astronomy, Ohio University
    • Nanoscale and Quantum Phenomena Institute, Department of Physics \& Astronomy, Ohio University, Athens, OH 45701

  • W. Lin

    • Department of Physics and Astronomy, Ohio University
    • Nanoscale and Quantum Phenomena Institute, Department of Physics \& Astronomy, Ohio University, Athens, OH 45701

  • T. Chen

    • Nanoscale and Quantum Phenomena Institute, Department of Physics and Astronomy, Ohio University, Athens, OH 45701
    • Nanoscale and Quantum Phenomena Institute, Department of Physics \& Astronomy, Ohio University, Athens, OH 45701

  • Y. Liu

    • Nanoscale and Quantum Phenomena Institute, Department of Physics and Astronomy, Ohio University, Athens, OH 45701
    • Department of Physics, Hokkaido University, Sapporo 060-0810, Japan
    • Nanoscale and Quantum Phenomena Institute, Department of Physics \& Astronomy, Ohio University, Athens, OH 45701

  • J. Pak

    • Department of Physics and Astronomy, Ohio University
    • Nanoscale and Quantum Phenomena Institute, Department of Physics and Astronomy, Ohio University, Athens, OH 45701
    • Nanoscale and Quantum Phenomena Institute, Department of Physics \& Astronomy, Ohio University, Athens, OH 45701