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

← Back to search

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 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	90	Pressure not reported	unknown
YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	83	Pressure not reported	unknown