%0 Book Section %1 statphys23_0464 %A Cappelluti, E. %A Gaudio, S. %A Pietronero, L. %B Abstract Book of the XXIII IUPAP International Conference on Statistical Physics %C Genova, Italy %D 2007 %E Pietronero, Luciano %E Loreto, Vittorio %E Zapperi, Stefano %K boundaries grain impurities isotope melting quantum solids statphys23 supersolid surface topic-8 %T Grain boundary surface melting and quantum impurities in solid $^4$He %U http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=464 %X We employ a quantum generalization of the self-consistent harmonic approximation to investigate the role of grain boundaries and of $^3$He impurities in solid $^4$He. We show that, under the experimental circumstances, surfaces melting and quantum lattice fluctuations make grain boundaries and $^3$He impurities always unstable against formation of $^4$He liquid phases. We show also that the anomalous dependence of the critical temperature and of the magnitude of the non classical rotational inertia is compatible with a simple model where $^3$He impurities rule the size of the grain boundaries.

@incollection{statphys23_0464, abstract = {We employ a quantum generalization of the self-consistent harmonic approximation to investigate the role of grain boundaries and of $^3$He impurities in solid $^4$He. We show that, under the experimental circumstances, surfaces melting and quantum lattice fluctuations make grain boundaries and $^3$He impurities always unstable against formation of $^4$He liquid phases. We show also that the anomalous dependence of the critical temperature and of the magnitude of the non classical rotational inertia is compatible with a simple model where $^3$He impurities rule the size of the grain boundaries.}, added-at = {2007-06-20T10:16:09.000+0200}, address = {Genova, Italy}, author = {Cappelluti, E. and Gaudio, S. and Pietronero, L.}, biburl = {https://www.bibsonomy.org/bibtex/259883c9142e57c80a5cc7cd534e9067d/statphys23}, booktitle = {Abstract Book of the XXIII IUPAP International Conference on Statistical Physics}, editor = {Pietronero, Luciano and Loreto, Vittorio and Zapperi, Stefano}, interhash = {c17e8b95a319bd37bd7aa3f8d0d76f7a}, intrahash = {59883c9142e57c80a5cc7cd534e9067d}, keywords = {boundaries grain impurities isotope melting quantum solids statphys23 supersolid surface topic-8}, month = {9-13 July}, timestamp = {2007-06-20T10:16:20.000+0200}, title = {Grain boundary surface melting and quantum impurities in solid $^4$He}, url = {http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=464}, year = 2007 }