Spin Injection into a Luttinger Liquid

Details Spin Injection into a Luttinger Liquid Spin Injection into a Luttinger Liquid

1998-03-12

arxiv.org/abs/cond-mat/9803158v2

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, REVTEX, 2 figures. Minor changes and corrections to typos. To appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.81.3191

We study the effect of spin injection into a Luttinger liquid. The spin-injection-detection setup of Johnson and Silsbee is considered; here spins injected into the Luttinger liquid induce, across an interface with a ferromagnetic metal, either a spin-dependent current ($I_s$) or a spin-dependent boundary voltage ($V_s$). We find that the spin-charge separation nature of the Luttinger liquid affects $I_s$ and $V_s$ in a very different fashion. In particular, in the Ohmic regime, $V_s$ depends on the spin transport properties of the Luttinger liquid in essentially the same way as it would in the case of a Fermi liquid. The implications of our results for the spin-injection-detection experiments in the high $T_c$ cuprates are discussed.

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