Phys. Rev. Lett. 80, 1336–1339 (1998)Cryogenic UHV-STM Study of Hydrogen and Deuterium Desorption from Si(100)Received 19 June 1997; published in the issue dated 9 February 1998 A cryogenic UHV scanning tunneling microscope has been used to study the electron stimulated desorption of hydrogen and deuterium from Si(100) surfaces at 11 K. A strong isotope effect is observed, as seen previously at room temperature. Above ∼5 eV, the desorption yields for H and D are temperature independent, while in the tunneling regime, below 4 eV, H is a factor of ∼300 easier to desorb at 11 than at 300 K. This large temperature dependence is explained by a model that involves multiple vibrational excitation and takes into account the increase of the Si-H(D) vibrational lifetime at low temperature. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.80.1336
DOI:
10.1103/PhysRevLett.80.1336
PACS:
79.20.La, 61.16.Ch, 87.64.Dz
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.