Faceting on He-3 crystals.

Alles, Harry and Babkin, A. and Jochemsen, Reyer and Parshin, Alexander Y. and Todoshchenko, Igor A. and Tsepelin, Viktor (2002) Faceting on He-3 crystals. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 99 (4). pp. 1796-1800. ISSN 0027-8424

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Abstract

It has been predicted by Landau that, ideally at low temperatures, crystals should show many different types of facets, i.e., flat smooth faces on their surface, but this so-called "devil's staircase" phenomenon has been difficult to observe experimentally. In this paper we describe our recent experiments, in which altogether 11 different types of facets have been identified on growing He-3 crystals at the temperature of 0.55 mK by using a unique low-temperature Fabry-Perot interferometer. Previously only 3 types of facets had been seen in this system. We have also measured the growth velocities of different facets, and our interpretation of the obtained results yields the conclusion that He-3 has much stronger coupling of the liquid-solid interface to the crystal lattice than has been expected. After an introduction we present a short theoretical background about the equilibrium crystal shape and the roughening transitions, which is followed by the description of our experimental results and discussion.

Item Type:	Article
Journal or Publication Title:	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Uncontrolled Keywords:	ROUGHENING TRANSITION ; EQUILIBRIUM SHAPE ; MELTING PRESSURE ; MK-TEMPERATURES ; SOLID HE-3 ; GROWTH ; SURFACES ; SUPERFLUID
Subjects:	Q Science > QC Physics
Departments:	Faculty of Science and Technology > Physics
ID Code:	23528
Deposited By:	Dr Richard P. Haley
Deposited On:	03 Feb 2009 10:13
Refereed?:	Yes
Published?:	Published
Last Modified:	26 Jul 2012 16:11
Identification Number:
URI:	http://eprints.lancs.ac.uk/id/eprint/23528

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