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Article overview
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Shear-melting of a hexagonal columnar crystal by proliferation of dislocations | L. Ramos
; F. Molino
; | Date: |
1 Jul 2004 | Journal: | Phys. Rev. Lett. 92 (2004) 018301 DOI: 10.1103/PhysRevLett.92.018301 | Subject: | Soft Condensed Matter | cond-mat.soft | Abstract: | A hexagonal columnar crystal undergoes a shear-melting transition above a critical shear rate or stress. We combine the analysis of the shear-thinning regime below the melting with that of synchrotron X-ray scattering data under shear and propose the melting to be due to a proliferation of dislocations, whose density is determined by both techniques to vary as a power law of the shear rate with a 2/3 exponent, as expected for a creep model of crystalline solids. Moreover, our data suggest the existence under shear of a line hexatic phase, between the columnar crystal and the liquid phase. | Source: | arXiv, cond-mat/0407030 | Services: | Forum | Review | PDF | Favorites |
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