Spontaneous Nernst effect in the iron-based superconductor Fe1+yTe1−xSex
Lu Chen, Ziji Xiang, Colin Tinsman, Bin Lei, Xianhui Chen, G. D. Gu, Lu Li
DOI 10.1103/PhysRevB.102.054503 · Physical Review B
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Abstract
We present a study of the Nernst effect in an iron-based superconductor with a nontrivial band topology Fe1+yTe1−xSex. A nonzero Nernst signal is observed in a narrow temperature region around the superconducting transition temperature Tc at a zero field. This anomalous Nernst signal shows symmetric dependence on the external magnetic field and indicates an unconventional vortex contribution in an s-wave superconductor with a strong spin-orbit coupling, which is originated from the local magnetic moments of the interstitial Fe atoms. Our experiments also provide the first evidence of a locally broken time-reversal symmetry in bulk Fe1+yTe1−xSex single crystals.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Fe1+yTe0.65Se0.34 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14.39 | Pressure not reported | unknown |
| Fe1+yTe0.6Se0.4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14.24 | Pressure not reported | unknown |
| Fe1+yTe0.61Se0.39 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13.15 | Pressure not reported | unknown |
| Fe1+yTe0.58Se0.41 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13.39 | Pressure not reported | unknown |
| Fe1+yTe0.56Se0.42 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13.75 | Pressure not reported | unknown |
| FeTe0.6Se0.4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14.02 | Pressure not reported | unknown |
| Ba0.27K0.73Fe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xBaxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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