Spin Hall effect in a Doped Mott Insulator

Details Spin Hall effect in a Doped Mott Insulator Spin Hall effect in a Doped Mott Insulator

2004-12-07

arxiv.org/abs/cond-mat/0412146v2

Physical Review B 72, 165114 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 1 figure; More discussions are added

Scientific paper

10.1103/PhysRevB.72.165114

The existence of conserved spin Hall currents is shown in a strongly correlated system without involving spin-orbit coupling. The spin Hall conductivity is determined by intrinsic bulk properties, which remains finite even when the charge resistivity diverges in strong magnetic fields at zero temperature. The state in the latter limit corresponds to a spin Hall insulator. Such a system is a doped Mott insulator described by the phase string theory, and spin Hall effect is predicted to coexist with the Nernst effect to characterize the intrinsic properties of the low-temperature pseudogap phase. Possible applications in spintronics are also mentioned.

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