TY - JOUR
T1 - Self-organization in H4 e near the superfluid transition in heat flow and gravity
AU - Yabunaka, Syunsuke
AU - Onuki, Akira
PY - 2010/7/1
Y1 - 2010/7/1
N2 - We investigate the nonlinear dynamics of H4 e slightly below the superfluid transition by integrating model F equations in three dimensions. When a superfluid is heated from above under gravity, a vortex tangle and sheetlike phase slips both appear near the bottom plate. Then a self-organized superfluid containing high-density vortices and phase slips grows upward, where high-amplitude second sounds are emitted from the self-organized to the ordinary superfluid region. A phase slip sheet often changes into a vortex aggregate and vice versa. The thermal resistance due to these defects produces a constant temperature gradient equal to the gradient of the pressure-dependent transition temperature Tλ (p). In this self-organized region, the temperature deviation T- Tλ (p) consists of a negative constant determined by the heat flux Q and time-dependent fluctuations. Its time average is calculated to be 155 nK for Q=11.2 erg/ cm2 s in good agreement with the experiment.
AB - We investigate the nonlinear dynamics of H4 e slightly below the superfluid transition by integrating model F equations in three dimensions. When a superfluid is heated from above under gravity, a vortex tangle and sheetlike phase slips both appear near the bottom plate. Then a self-organized superfluid containing high-density vortices and phase slips grows upward, where high-amplitude second sounds are emitted from the self-organized to the ordinary superfluid region. A phase slip sheet often changes into a vortex aggregate and vice versa. The thermal resistance due to these defects produces a constant temperature gradient equal to the gradient of the pressure-dependent transition temperature Tλ (p). In this self-organized region, the temperature deviation T- Tλ (p) consists of a negative constant determined by the heat flux Q and time-dependent fluctuations. Its time average is calculated to be 155 nK for Q=11.2 erg/ cm2 s in good agreement with the experiment.
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U2 - 10.1103/PhysRevB.82.024501
DO - 10.1103/PhysRevB.82.024501
M3 - Article
AN - SCOPUS:77956589429
VL - 82
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 2
M1 - 024501
ER -