Thermoelectric response of Fe$_{1+y}$Te$_{0.6}$Se$_{0.4}$: evidence for strong correlation and low carrier density
| Autor: | Pourret, A., Malone, L., Antunes, A. B., Yadav, C. S., Paulose, P. L., Fauqué, B., Behnia, K. |
|---|---|
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 83, 020504(R) (2011) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.83.020504 |
| Popis: | We present a study of the Seebeck and Nernst coefficients of Fe$_{1+y}$Te$_{1-x}$Se$_{x}$ extended up to 28 T. The large magnitude of the Seebeck coefficient in the optimally doped sample tracks a remarkably low normalized Fermi temperature, which, like other correlated superconductors, is only one order of magnitude larger than T$_c$. We combine our data with other experimentally measured coefficients of the system to extract a set of self-consistent parameters, which identify Fe$_{1+y}$Te$_{0.6}$Se$_{0.4}$ as a low-density correlated superconductor barely in the clean limit. The system is subject to strong superconducting fluctuations with a sizeable vortex Nernst signal in a wide temperature window. Comment: 4 pages including 4 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|