Bright beaches of nanoscale potassium islands on graphite in STM imaging,
Yin, F., Akola, J., Koskinen, P., Manninen, M., & Palmer, R.E. (2009). Bright beaches of nanoscale potassium islands on graphite in STM imaging,. Phys. Rev. Lett., (102), 106102. https://doi.org/10.1103/PhysRevLett.102.106102
Julkaistu sarjassa
Phys. Rev. Lett.Päivämäärä
2009Tekijänoikeudet
© 2009 The American Physical Society
We demonstrate, via scanning tunneling microscopy (STM) measurements performed at 48 K, the existence of “bright beaches” at the edges of K islands (diameter
∼
5
–
500
nm
) on the graphite surface. The enhanced tunneling current is only observed in monolayer-high islands on graphite, and not in islands of similar geometry on top of a K monolayer film. First-principles density functional calculations and STM simulations suggest that this is an STM field effect, which appears as the positive tip attracts donated electrons back to the metallic K islands. The restored charge accumulates preferentially at the island edges.
Julkaisija
American Physical SocietyISSN Hae Julkaisufoorumista
0031-9007Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/19393419
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