Bhaseen M J, Green A G, Sondhi S L
Rudolf Peierls Centre for Theoretical Physics, 1 Keble Road, Oxford, OX1 3NP, United Kingdom.
Phys Rev Lett. 2007 Apr 20;98(16):166801. doi: 10.1103/PhysRevLett.98.166801. Epub 2007 Apr 18.
We investigate the finite temperature magnetothermoelectric response in the vicinity of a superfluid-Mott-insulator quantum phase transition. We focus on the particle-hole symmetric transitions of the Bose-Hubbard model, and combine Lorentz invariance arguments with quantum Boltzmann calculations. By means of an epsilon expansion, we find that a nonvanishing thermoelectric tensor and a finite thermal transport coefficient are supported in this quantum critical regime. We comment on the singular Nernst effect in this problem.
我们研究了超流体-莫特绝缘体量子相变附近的有限温度磁热电响应。我们聚焦于玻色-哈伯德模型的粒子-空穴对称相变，并将洛伦兹不变性论证与量子玻尔兹曼计算相结合。通过ε展开，我们发现在这个量子临界区域中存在非零的热电张量和有限的热输运系数。我们对这个问题中的奇异能斯特效应进行了评论。
