Spin andreev-like reflection in metal-mott insulator heterostructures

K. A. Al-Hassanieh, Julián Rincón, G. Alvarez, E. Dagotto

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Resumen

Using the time-dependent density-matrix renormalization group (tDMRG), we study the time evolution of electron wave packets in one-dimensional (1D) metal-superconductor heterostructures. The results show Andreev reflection at the interface, as expected. By combining these results with the well-known single-spin-species electron-hole transformation in the Hubbard model, we predict an analogous spin Andreev reflection in metal-Mott insulator heterostructures. This effect is numerically confirmed using 1D tDMRG, but it is expected to also be present in higher dimensions, as well as in more general Hamiltonians. We present an intuitive picture of the spin reflection, analogous to that of Andreev reflection at metal-superconductor interfaces. This allows us to discuss a novel antiferromagnetic proximity effect. Possible experimental realizations are discussed.

Idioma originalInglés estadounidense
Número de artículo066401
PublicaciónPhysical Review Letters
Volumen114
N.º6
DOI
EstadoPublicada - feb 9 2015
Publicado de forma externa

All Science Journal Classification (ASJC) codes

  • Física y astronomía (todo)

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