Transport measurements using the dc flux transformer configuration together with c-axis resistance data in clean and twinned YBa₂Cu₃O_7-δ single crystals show that vortices are localized by the twin-boundary potential. The results support the existence of a divergent tilt modulus [D. R. Nelson and V. M. Vinokur, Phys. Rev. B 48, 13 060 (1993)] in a liquid that freezes into a Bose glass.
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López et al. (1996) studied this question.
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