Composition induced metal-insulator quantum phase transition in the Heusler type Fe2VAl
| Autor: | Naka, Takashi, Nikitin, Artem M., Pan, Yu, de Visser, Anne, Nakane, Takayuki, Ishikawa, Fumihiro, Yamada, Yuh, Imai, Motoharu, Matsushita, Akiyuki |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | J. Phys.: Condens. Matter, 28, 285601 (2016) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/0953-8984/28/28/285601 |
| Popis: | We report the magnetism and transport properties of the Heusler compound Fe2+xV1-xAl at -0.10 < x < 0.10 under pressure and a magnetic field. A metal-insulator quantum phase transition occurred at x = -0.05. Application of pressure or a magnetic field facilitated the emergence of finite zero-temperature conductivity around the critical point, which scaled approximately according to the power law. At x < -0.05, a localized paramagnetic spin appeared, whereas above the ferromagnetic quantum critical point at x = 0.05, itinerant ferromagnetism was established. At the quantum critical points at x = -0.05 and 0.05, the resistivity and specific heat exhibited singularities characteristic of a Griffiths phase appearing as an inhomogeneous electronic state. Comment: submitted for Journal of Physics: Condensed Matter, 18 pages, 13 figures |
| Databáze: | arXiv |
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