Wavelength tunability of ion-bombardment-induced ripples on sapphire

  title={Wavelength tunability of ion-bombardment-induced ripples on sapphire},
  author={Hua Zhou and Yiping Wang and Lan Zhou and Randall L. Headrick and Ahmet S. Ozcan and Yiyi Wang and Gozde Ozaydin and K. F. Jun. Ludwig and Denes Molnar Department of Physics and Universityof Vermont and Burlington and V. A. Poghosyan Department of Physics and Boston University and Boston MA Usa National Synchrotron Light Source and Brookhaven National Laboratory and Upton and Ny Usa},
  journal={Physical Review B},
A study of ripple formation on sapphire surfaces by 300-2000 eV Ar{sup +} ion bombardment is presented. Surface characterization by in-situ synchrotron grazing incidence small angle x-ray scattering and ex-situ atomic force microscopy is performed in order to study the wavelength of ripples formed on sapphire (0001) surfaces. We find that the wavelength can be varied over a remarkably wide range -- nearly two orders of magnitude -- by changing the ion incidence angle. Within the linear theory… Expand

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