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Wayne Saslow headshot
April 10, 20154:00 pm – 5:00 pm (CDT)

A Tale of Two Theories (for Non-Experts) — The Spin Hall Effect and its Inverse


Wayne Saslow (Texas A&M University)



Mitchell Institute for Fundamental Physics & Astronomy

College Station, Texas 77843

Event Details

We discuss both the Dyakonov and Perel theory (1971) and the Hirsch hand-waving physical reasoning (1979) that leads to the spin Hall effect (SHE) and to the inverse spin Hall effect (ISHE).
(1) In the SHE an electric current along a conducting wire or strip produces a transverse ""spin accumulation"" (excess or deficit of spin, relative to equilibrium). Sometimes this is called "spin voltage".
(2) In the ISHE a spin current along a wire or strip produces a transverse electrical voltage. Both theory and experiment have been active in this area for the past fifteen years.
We will show both how the anomalous Hall effect coefficient (AHE) follows from the DP theory, and that DP theory (based on a kinetic theory hidden from the reader) is largely consistent with the more stringent requirements of the Onsager relations. Time-permitting we will discuss a new effect second order in the spin-orbit parameter (spin-Hall angle).

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