Suppression and Revival of Magnetic Correlations at Interfaces

Details Suppression and Revival of Magnetic Correlations at Interfaces Suppression and Revival of Magnetic Correlations at Interfaces

2011-08-22

arxiv.org/abs/1108.4239v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

The nature of magnetic order near surfaces is a topic of great recent interest. Here we study a model of metal-insulator interfaces: a multilayer, tight-binding Hamiltonian in which the correlation energy is nonzero on one set of planes and zero on another. As the interface hybridization is tuned, the magnetism and spectral functions in the correlated layers undergo an evolution in which the signatures of strong interaction are first reduced and subsequently revived. This revival occurs as a consequence of the formation of a spin liquid state between the metallic and correlated layers at the interface which acts to shield the remaining layers. The penetration into the correlated layers of the suppression of magnetic order is found to be 4-6 layers.

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