Specific heat of disordered superfluid 3He.
Specific heat of disordered superfluid 3He.
复制标题
无序超流体 3He 的比热。
DOI：
--
复制
发表时间：
2004
影响因子：
8.6
通讯作者：
W. Halperin
中科院分区：
文献类型：
--
作者：
H. Choi;K. Yawata;T. Haard;J. Davis;G. Gervais;N. Mulders;P. Sharma;J. Sauls;W. Halperin
的比热的超流3 He，无序的二氧化硅气凝胶，被发现有一个尖锐的不连续性标记的热力学过渡到超流性的温度降低散装3 He。不连续性的幅度也被抑制。这种无序效应可以从Ginzburg-Landau理论中理解，该理论考虑了弹性准粒子散射抑制了相变温度和序参量的振幅。我们推断，在无序超流状态下，比热的极限温度依赖性在低温下是线性的，与费米表面上到处都是无隙激发的预测一致。
The specific heat of superfluid 3He, disordered by a silica aerogel, is found to have a sharp discontinuity marking the thermodynamic transition to superfluidity at a temperature reduced from that of bulk 3He. The magnitude of the discontinuity is also suppressed. This disorder effect can be understood from the Ginzburg-Landau theory which takes into account elastic quasiparticle scattering suppressing both the transition temperature and the amplitude of the order parameter. We infer that the limiting temperature dependence of the specific heat is linear at low temperatures in the disordered superfluid state, consistent with predictions of gapless excitations everywhere on the Fermi surface.