| Autor: |
Carolina Burger, Andreas Bauer, Christian Pfleiderer |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
SciPost Physics Proceedings, Iss 11, p 020 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2666-4003 |
| DOI: |
10.21468/SciPostPhysProc.11.020 |
| Popis: |
Recently, a high-mobility surface conduction channel and in-gap states were identified in the correlated small-gap semiconductor FeSi using electrical transport measurements and high-resolution tunneling spectroscopy. The mobility of the charge carriers in the surface channel is quantitatively reminiscent of topological insulators, but displays a lack of sensitivity to the presence of ferromagnetic impurities as studied by means of a series of single crystals with slightly different starting compositions. Here, we report measurements of the specific heat of these crystals. At low temperatures, a shallow maximum is observed in the specific heat divided by temperature. This maximum is suppressed under magnetic field, characteristic of a Schottky anomaly associated with magnetic impurities. In comparison, the height of this maximum decreases with increasing initial iron content. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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