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Conducting ballistic magnetoresistance and tunneling magnetoresistance: Pinholes and tunnel barriers

AutorGarcía García, Nicolás
Fecha de publicación28-ago-2000
EditorAmerican Institute of Physics
CitaciónApplied Physics Letters 77(9): 1351 (2000)
ResumenThis letter shows that conducting ballistic and tunneling magnetoresistances have identical physical treatments and, therefore, it is not possible to distinguish whether an experiment is measuring, in oxide barriers, electron conduction through pinholes or tunneling because both types of conduction are governed by the same physics. Currents in both cases are calculated by matching wave functions at the electrodes (both are ballistic). Therefore, pinholes or small ballistic nanocontacts in the tunnel barrier allow conducting ballistic electrons that account for most of the current. We also show that, in the case of nonsuperconducting materials, e.g., magnetic materials, current–voltage characteristics are not suitable to distinguish one process from the other.
Descripción3 pages, 1 figure.
Versión del editorhttp://dx.doi.org/10.1063/1.1290271
URIhttp://hdl.handle.net/10261/20891
DOI10.1063/1.1290271
ISSN0003-6951
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