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.
@article{arxiv.1604.01114,
title = {Composition induced metal-insulator quantum phase transition in the Heusler type Fe2VAl},
author = {Takashi Naka and Artem M. Nikitin and Yu Pan and Anne de Visser and Takayuki Nakane and Fumihiro Ishikawa and Yuh Yamada and Motoharu Imai and Akiyuki Matsushita},
journal= {arXiv preprint arXiv:1604.01114},
year = {2021}
}
Comments
submitted for Journal of Physics: Condensed Matter, 18 pages, 13 figures