Size-Dependent Detachment-Limited Decay Kinetics of Two-Dimensional TiN Islands on TiN(111)

S. Kodambaka, V. Petrova, S. V. Khare, D. Gall, A. Rockett, I. Petrov, J. E. Greene

Research output: Contribution to journalArticlepeer-review

Abstract

The decay kinetics of 2D TiN adatom and vacancy islands on highly anisotropic TiN(111) surfaces were measured using in situ high-temperature STM. There was an abrupt decrease in decay rates for adatom islands with areas A less than a critical value Ac≃1600 Å2, irrespective of Ta. However, no decay rate transition was observed for vacancy islands. The coarsening/decay kinetics of both adatom and vacancy islands on TiN(111) were found to be consistent with a detachment-limited mechanism. From time- and temperature-dependent island area measurements, activation energies were obtained for TiN(111) adatom island decay of 3.3±0.4 eV (A<Ac) and 2.3±0.6 eV (A>Ac). Overall, the results provide the first evidence of a strong island size-dependence, and therefore a large anisotropy in attachment/detachment activation barriers.

Original languageEnglish (US)
JournalPhysical review letters
Volume89
Issue number17
DOIs
StatePublished - 2002
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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