TY - JOUR
T1 - Preliminary heat-capacity measurements of 2D solid 3He adsorbed on graphite preplated with 4He
AU - Matsumoto, Yosuke
AU - Murakawa, S.
AU - Tsuji, D.
AU - Bäuerle, C.
AU - Kambara, H.
AU - Fukuyama, Hiroshi
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2004/1
Y1 - 2004/1
N2 - We describe preliminary results of heat capacity measurements of the 4/7 phase in two dimensional 3He adsorbed on graphite preplated with a 4He monolayer in a temperature range between 0.17 and 20 mK. In zero magnetic field, we observed a double-peak structure similar to that reported previously for the same phase in a different system (3 He/3 He/gr) in which the gapless quantum spin-liquid ground state is proposed. The exchange interaction deduced from the high temperature data is by a factor of 30% smaller than the previous one, presumably because of the smaller lattice constant for the 3He/4He/gr system. The present result provides strong evidence that such a peculiar temperature dependence of heat capacity is characteristic of the 4/7 phase. Application of magnetic fields up to 0.65 T on this phase does not seem to change appreciably the higher temperature broad peak at around 1.4 mK.
AB - We describe preliminary results of heat capacity measurements of the 4/7 phase in two dimensional 3He adsorbed on graphite preplated with a 4He monolayer in a temperature range between 0.17 and 20 mK. In zero magnetic field, we observed a double-peak structure similar to that reported previously for the same phase in a different system (3 He/3 He/gr) in which the gapless quantum spin-liquid ground state is proposed. The exchange interaction deduced from the high temperature data is by a factor of 30% smaller than the previous one, presumably because of the smaller lattice constant for the 3He/4He/gr system. The present result provides strong evidence that such a peculiar temperature dependence of heat capacity is characteristic of the 4/7 phase. Application of magnetic fields up to 0.65 T on this phase does not seem to change appreciably the higher temperature broad peak at around 1.4 mK.
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U2 - 10.1023/b:jolt.0000012535.73760.b1
DO - 10.1023/b:jolt.0000012535.73760.b1
M3 - Article
AN - SCOPUS:1842612370
SN - 0022-2291
VL - 134
SP - 61
EP - 66
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
IS - 1-2
ER -