Impurity-induced transition to a Mott insulator in Sr₃Ru₂O₇
Mathieu, R. · Asamitsu, A. · Kaneko, Y. · He, J. P. · Yu, X. Z. · Kumai, R. · Onose, Y. · Takeshita, N. · Arima, T. · Takagi, H. · Tokura, Y.
Original · EN
The electrical, magnetic, and structural properties of Sr₃(Ru₁₋ₓMnₓ)₂O₇ (0 ≤ x ≤ 0.2) are investigated. The parent compound Sr₃Ru₂O₇ is a paramagnetic metal, critically close to magnetic order. We have found that, with a Ru-site doping by only a few percent of Mn, the ground state is switched from a paramagnetic metal to an antiferromagnetic insulator. Optical conductivity measurements show the opening of a gap as large as 0.1 eV, indicating that the metal-to-insulator transition is driven by the electron correlation. The complex low-temperature antiferromagnetic spin arrangement, reminiscent of those observed in some nickelates and manganites, suggests a long range orbital order.
English translation
This paper has no Arabic translation yet. Be the first: it takes a few seconds, and the result is stored for every future reader.