Anomalously low electronic thermal conductivity in metallic vanadium dioxide
2017; American Association for the Advancement of Science; Volume: 355; Issue: 6323 Linguagem: Inglês
10.1126/science.aag0410
ISSN1095-9203
AutoresSangwook Lee, Kedar Hippalgaonkar, Fan Yang, Jiawang Hong, Changhyun Ko, Joonki Suh, Kai Liu, Kevin Wang, Jeffrey J. Urban, Xiang Zhang, Chris Dames, Sean A. Hartnoll, Olivier Delaire, Junqiao Wu,
Tópico(s)Advanced Thermoelectric Materials and Devices
ResumoDecoupling charge and heat transport In metals, electrons carry both charge and heat. As a consequence, electrical conductivity and the electronic contribution to the thermal conductivity are typically proportional to each other. Lee et al. found a large violation of this so-called Wiedemann-Franz law near the insulator-metal transition in VO 2 nanobeams. In the metallic phase, the electronic contribution to thermal conductivity was much smaller than what would be expected from the Wiedemann-Franz law. The results can be explained in terms of independent propagation of charge and heat in a strongly correlated system. Science , this issue p. 371
Referência(s)