Spin Andreev-like Reflection in Metal-Mott Insulator Heterostructures

被引：7

作者：

Al-Hassanieh, K. A. ^{[1
]}

Rincon, Julian ^{[1
,2
]}

Alvarez, G. ^{[1
,3
]}

Dagotto, E. ^{[4
,5
]}

机构：

[1] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[2] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada

[3] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA

[4] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[5] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 06期

关键词：

DENSITY-MATRIX RENORMALIZATION; FERROMAGNET; SUPERCONDUCTORS; DEPENDENCE; TRANSPORT; JUNCTIONS;

D O I：

10.1103/PhysRevLett.114.066401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 singlespin- 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 metalsuperconductor interfaces. This allows us to discuss a novel antiferromagnetic proximity effect. Possible experimental realizations are discussed.

引用

页数：5

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