Spin andreev-like reflection in metal-mott insulator heterostructures

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

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number066401
JournalPhysical Review Letters
Volume114
Issue number6
DOIs
StatePublished - Feb 9 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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