Drastic change in transport of entropy with quadrupolar ordering in.
Drastic change in transport of entropy with quadrupolar ordering in.
复制标题
DOI：
10.1103/physrevlett.96.176402
复制
发表时间：
2005-12
影响因子：
8.6
通讯作者：
A. Pourret;Kamran Behnia;D. Kikuchi;Y. Aoki;H. Sugawara;H. Sato
中科院分区：
文献类型：
--
作者：
A. Pourret;Kamran Behnia;D. Kikuchi;Y. Aoki;H. Sugawara;H. Sato
的反铁四极有序探索探测热和热电输运。晶格热导率急剧增加的顺序，作为一个结果，在载流子浓度和强的电子-声子耦合的大幅度下降。在有序状态下的载流子密度的低水平被证实的塞贝克和能斯特系数的异常大的值。结果是令人想起，并建议，两者属于同一类的部分金属-绝缘体转变。能斯特系数的大小，大于任何其他金属，表明在开尔文温度下埃廷斯豪森冷却的新途径。
The antiferroquadrupolar ordering of is explored by probing thermal and thermoelectric transport. The lattice thermal conductivity drastically increases with the ordering, as a consequence of a large drop in carrier concentration and a strong electron-phonon coupling. The low level of carrier density in the ordered state is confirmed by the anomalously large values of the Seebeck and Nernst coefficients. The results are reminiscent of and suggest that both belong to the same class of partial metal-insulator transitions. The magnitude of the Nernst coefficient, larger than in any other metal, indicates a new route for Ettingshausen cooling at Kelvin temperatures.