Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Faceting on He-3 crystals.
AU - Alles, Harry
AU - Babkin, A.
AU - Jochemsen, Reyer
AU - Parshin, Alexander Y.
AU - Todoshchenko, Igor A.
AU - Tsepelin, Viktor
PY - 2002/2
Y1 - 2002/2
N2 - 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.
AB - 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.
KW - ROUGHENING TRANSITION
KW - EQUILIBRIUM SHAPE
KW - MELTING PRESSURE
KW - MK-TEMPERATURES
KW - SOLID HE-3
KW - GROWTH
KW - SURFACES
KW - SUPERFLUID
M3 - Journal article
VL - 99
SP - 1796
EP - 1800
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
SN - 0027-8424
IS - 4
ER -