Cleavage and brittle fracture in GaAs: Indication of lattice dynamic instability on the nanometer scale
Atomic configurations of cleaved GaAs (110) surfaces are analysed to check existing models of cleavage and step formation in solids. Morphologies of $1\;\mu{\rm m}^2$ were investigated in UHV at 300 K with a Scanning Tunneling Microscope and compared to Monte Carlo simulations. The analysis supports...
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| Veröffentlicht in: | Europhysics letters 1997-06, Vol.38 (9), p.675-680 |
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| container_title | Europhysics letters |
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| creator | Rosentreter, M. A Wenderoth, M Theuerkauf, N. H Heinrich, A. J Schneider, M. A Ulbrich, R. G |
| description | Atomic configurations of cleaved GaAs (110) surfaces are analysed to check existing models of cleavage and step formation in solids. Morphologies of $1\;\mu{\rm m}^2$ were investigated in UHV at 300 K with a Scanning Tunneling Microscope and compared to Monte Carlo simulations. The analysis supports the view that the processes involved in fracture are far from thermal equilibrium. Two characteristic length scales are found in the morphologies. Mean terrace widths of 10 nm and large-scale fluctuations of 100 nm both point to non-linear lattice dynamic instabilities which occur during crack propagation. |
| doi_str_mv | 10.1209/epl/i1997-00302-7 |
| format | Article |
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| ispartof | Europhysics letters, 1997-06, Vol.38 (9), p.675-680 |
| issn | 0295-5075 1286-4854 |
| language | eng |
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| source | IOP Publishing Journals |
| subjects | 61.16Ch 62.20.Mk 68.35.Bs |
| title | Cleavage and brittle fracture in GaAs: Indication of lattice dynamic instability on the nanometer scale |
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