Behnia K, Bel R, Kasahara Y, Nakajima Y, Jin H, Aubin H, Izawa K, Matsuda Y, Flouquet J, Haga Y, Onuki Y, Lejay P
Laboratoire de Physique Quantique (CNRS), ESPCI, 10 Rue de Vauquelin, 75231 Paris, France.
Phys Rev Lett. 2005 Apr 22;94(15):156405. doi: 10.1103/PhysRevLett.94.156405. Epub 2005 Apr 21.
We present a study of thermal conductivity in the normal state of the heavy-fermion superconductor URu2Si2. Ordering at 18 K leads to a steep increase in thermal conductivity and (in contrast with all other cases of magnetic ordering in heavy-fermion compounds) to an enhancement of the Lorenz number. By linking this observation to several other previously reported features, we conclude that most of the carriers disappear in the ordered state and this leads to a drastic increase in both the phononic and electronic mean free path.
我们展示了对重费米子超导体URu2Si2正常态热导率的一项研究。18K时的有序化导致热导率急剧增加，并且（与重费米子化合物中所有其他磁有序情况相反）导致洛伦兹数增大。通过将这一观察结果与其他几个先前报道的特征联系起来，我们得出结论，大多数载流子在有序态中消失，这导致声子和电子平均自由程都急剧增加。
