Spin-polarized transport across a La0.7Sr0.3MnO3/YBa2Cu3O7−x interface: Role of Andreev bound states

Z. Y. Chen; Amlan Biswas; Igor Žutić; T. Wu; S. B. Ogale; R. L. Greene; T. Venkatesan

doi:10.1103/PhysRevB.63.212508

Spin-polarized transport across a La_0.7Sr_0.3MnO₃/YBa₂Cu₃O_7−x interface: Role of Andreev bound states

Z. Y. Chen, Amlan Biswas, Igor Žutić, T. Wu, S. B. Ogale, R. L. Greene, T. Venkatesan

Research output: Contribution to journal › Article › peer-review

71 Scopus citations

Abstract

Transport across an La_0.7Sr_0.3MnO₃/YBa₂Cu₃O_7−x (LSMO/YBCO) interface is studied as a function of temperature and surface morphology. For comparison, control measurements are performed in nonmagnetic heterostructures of LaNiO₃/YBCO and Ag/YBCO. In all cases, YBCO is used as bottom layer to eliminate the channel resistance and to minimize thermal effects. The observed differential conductance reflects the role of Andreev bound states in the a−b plane, and displays the suppression of such states by the spin-polarized transport across the interface. The theoretical analysis of the measured data reveals decay of the spin polarization near the LSMO surface with temperature, consistent with the reported photoemission data.

Original language	English (US)
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	63
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.63.212508
State	Published - May 7 2001
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.63.212508

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title = "Spin-polarized transport across a La0.7Sr0.3MnO3/YBa2Cu3O7−x interface: Role of Andreev bound states",

abstract = "Transport across an La0.7Sr0.3MnO3/YBa2Cu3O7−x (LSMO/YBCO) interface is studied as a function of temperature and surface morphology. For comparison, control measurements are performed in nonmagnetic heterostructures of LaNiO3/YBCO and Ag/YBCO. In all cases, YBCO is used as bottom layer to eliminate the channel resistance and to minimize thermal effects. The observed differential conductance reflects the role of Andreev bound states in the a−b plane, and displays the suppression of such states by the spin-polarized transport across the interface. The theoretical analysis of the measured data reveals decay of the spin polarization near the LSMO surface with temperature, consistent with the reported photoemission data.",

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doi = "10.1103/PhysRevB.63.212508",

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AU - Chen, Z. Y.

AU - Biswas, Amlan

AU - Žutić, Igor

AU - Wu, T.

AU - Ogale, S. B.

AU - Greene, R. L.

AU - Venkatesan, T.

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N2 - Transport across an La0.7Sr0.3MnO3/YBa2Cu3O7−x (LSMO/YBCO) interface is studied as a function of temperature and surface morphology. For comparison, control measurements are performed in nonmagnetic heterostructures of LaNiO3/YBCO and Ag/YBCO. In all cases, YBCO is used as bottom layer to eliminate the channel resistance and to minimize thermal effects. The observed differential conductance reflects the role of Andreev bound states in the a−b plane, and displays the suppression of such states by the spin-polarized transport across the interface. The theoretical analysis of the measured data reveals decay of the spin polarization near the LSMO surface with temperature, consistent with the reported photoemission data.

AB - Transport across an La0.7Sr0.3MnO3/YBa2Cu3O7−x (LSMO/YBCO) interface is studied as a function of temperature and surface morphology. For comparison, control measurements are performed in nonmagnetic heterostructures of LaNiO3/YBCO and Ag/YBCO. In all cases, YBCO is used as bottom layer to eliminate the channel resistance and to minimize thermal effects. The observed differential conductance reflects the role of Andreev bound states in the a−b plane, and displays the suppression of such states by the spin-polarized transport across the interface. The theoretical analysis of the measured data reveals decay of the spin polarization near the LSMO surface with temperature, consistent with the reported photoemission data.

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Spin-polarized transport across a La_0.7Sr_0.3MnO₃/YBa₂Cu₃O_7−x interface: Role of Andreev bound states

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