TY - JOUR
T1 - Impurity-induced transition to a Mott insulator in Sr3Ru2O7
AU - Mathieu, R.
AU - Asamitsu, A.
AU - Kaneko, Y.
AU - He, J. P.
AU - Yu, X. Z.
AU - Kumai, R.
AU - Onose, Y.
AU - Takeshita, N.
AU - Arima, T.
AU - Takagi, H.
AU - Tokura, Y.
PY - 2005/9/1
Y1 - 2005/9/1
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.72.092404
DO - 10.1103/PhysRevB.72.092404
M3 - Article
AN - SCOPUS:29644443706
SN - 1098-0121
VL - 72
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 9
M1 - 092404
ER -