Chen, Z. Y. ; Biswas, Amlan ; Zutic, Igor ; Wu, T. ; Ogale, S. B. ; Greene, R. L. ; Venkatesan, T. (2001) Spin-polarized transport across a La0.7Sr0.3MnO3/YBa2Cu3O7-x interface: role of Andreev bound states Physical Review B, 63 (21). 212508_1- 212508_4. ISSN 0163-1829
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Official URL: http://prb.aps.org/abstract/PRB/v63/i21/e212508
Related URL: http://dx.doi.org/10.1103/PhysRevB.63.212508
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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 26866 |
| Deposited On: | 08 Dec 2010 13:04 |
| Last Modified: | 11 Jun 2011 11:22 |
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