Charge transport and magnetization profile at the interface between the correlated metal CaRuO3 and the antiferromagnetic insulator CaMnO3

J. W. Freeland; J. Chakhalian; A. V. Boris; J. M. Tonnerre; J. J. Kavich; P. Yordanov; S. Grenier; P. Zschack; E. Karapetrova; P. Popovich; H. N. Lee; B. Keimer

doi:10.1103/PhysRevB.81.094414

Charge transport and magnetization profile at the interface between the correlated metal CaRuO₃ and the antiferromagnetic insulator CaMnO₃

J. W. Freeland, J. Chakhalian, A. V. Boris, J. M. Tonnerre, J. J. Kavich, P. Yordanov, S. Grenier, P. Zschack, E. Karapetrova, P. Popovich, H. N. Lee, B. Keimer

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Abstract

A combination of spectroscopic probes was used to develop a detailed experimental description of the transport and magnetic properties of superlattices composed of the paramagnetic metal CaRuO₃ and the antiferromagnetic insulator CaMnO₃. The charge-carrier density and Ru valence state in the superlattices are not significantly different from those of bulk CaRuO₃. The small charge transfer across the interface implied by these observations confirms predictions derived from density-functional calculations. However, a ferromagnetic polarization due to canted Mn spins penetrates 3-4 unit cells into CaMnO₁3, far exceeding the corresponding predictions. The discrepancy may indicate the formation of magnetic polarons at the interface.

Original language	English
Article number	094414
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.81.094414
State	Published - Mar 12 2010

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Freeland, J. W., Chakhalian, J., Boris, A. V., Tonnerre, J. M., Kavich, J. J., Yordanov, P., Grenier, S., Zschack, P., Karapetrova, E., Popovich, P., Lee, H. N., & Keimer, B. (2010). Charge transport and magnetization profile at the interface between the correlated metal CaRuO₃ and the antiferromagnetic insulator CaMnO₃. Physical Review B - Condensed Matter and Materials Physics, 81(9), Article 094414. https://doi.org/10.1103/PhysRevB.81.094414

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title = "Charge transport and magnetization profile at the interface between the correlated metal CaRuO3 and the antiferromagnetic insulator CaMnO3",

abstract = "A combination of spectroscopic probes was used to develop a detailed experimental description of the transport and magnetic properties of superlattices composed of the paramagnetic metal CaRuO3 and the antiferromagnetic insulator CaMnO3. The charge-carrier density and Ru valence state in the superlattices are not significantly different from those of bulk CaRuO3. The small charge transfer across the interface implied by these observations confirms predictions derived from density-functional calculations. However, a ferromagnetic polarization due to canted Mn spins penetrates 3-4 unit cells into CaMnO13, far exceeding the corresponding predictions. The discrepancy may indicate the formation of magnetic polarons at the interface.",

author = "Freeland, {J. W.} and J. Chakhalian and Boris, {A. V.} and Tonnerre, {J. M.} and Kavich, {J. J.} and P. Yordanov and S. Grenier and P. Zschack and E. Karapetrova and P. Popovich and Lee, {H. N.} and B. Keimer",

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doi = "10.1103/PhysRevB.81.094414",

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Freeland, JW, Chakhalian, J, Boris, AV, Tonnerre, JM, Kavich, JJ, Yordanov, P, Grenier, S, Zschack, P, Karapetrova, E, Popovich, P, Lee, HN & Keimer, B 2010, 'Charge transport and magnetization profile at the interface between the correlated metal CaRuO₃ and the antiferromagnetic insulator CaMnO₃', Physical Review B - Condensed Matter and Materials Physics, vol. 81, no. 9, 094414. https://doi.org/10.1103/PhysRevB.81.094414

TY - JOUR

T1 - Charge transport and magnetization profile at the interface between the correlated metal CaRuO3 and the antiferromagnetic insulator CaMnO3

AU - Freeland, J. W.

AU - Chakhalian, J.

AU - Boris, A. V.

AU - Tonnerre, J. M.

AU - Kavich, J. J.

AU - Yordanov, P.

AU - Grenier, S.

AU - Zschack, P.

AU - Karapetrova, E.

AU - Popovich, P.

AU - Lee, H. N.

AU - Keimer, B.

PY - 2010/3/12

Y1 - 2010/3/12

N2 - A combination of spectroscopic probes was used to develop a detailed experimental description of the transport and magnetic properties of superlattices composed of the paramagnetic metal CaRuO3 and the antiferromagnetic insulator CaMnO3. The charge-carrier density and Ru valence state in the superlattices are not significantly different from those of bulk CaRuO3. The small charge transfer across the interface implied by these observations confirms predictions derived from density-functional calculations. However, a ferromagnetic polarization due to canted Mn spins penetrates 3-4 unit cells into CaMnO13, far exceeding the corresponding predictions. The discrepancy may indicate the formation of magnetic polarons at the interface.

AB - A combination of spectroscopic probes was used to develop a detailed experimental description of the transport and magnetic properties of superlattices composed of the paramagnetic metal CaRuO3 and the antiferromagnetic insulator CaMnO3. The charge-carrier density and Ru valence state in the superlattices are not significantly different from those of bulk CaRuO3. The small charge transfer across the interface implied by these observations confirms predictions derived from density-functional calculations. However, a ferromagnetic polarization due to canted Mn spins penetrates 3-4 unit cells into CaMnO13, far exceeding the corresponding predictions. The discrepancy may indicate the formation of magnetic polarons at the interface.

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U2 - 10.1103/PhysRevB.81.094414

DO - 10.1103/PhysRevB.81.094414

M3 - Article

AN - SCOPUS:77954934929

SN - 1098-0121

VL - 81

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 9

M1 - 094414

ER -

Charge transport and magnetization profile at the interface between the correlated metal CaRuO₃ and the antiferromagnetic insulator CaMnO₃

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