Kavli Affiliate: Leon Balents
| First 5 Authors: Ren-Bo Wang, Naveen Nishad, Anna Keselman, Leon Balents, Oleg A. Starykh
| Summary:
We present the theory of the longitudinal spin Seebeck effect between a
Heisenberg spin-1/2 chain and a conductor. The effect consists of the
generation of a spin current across the spin chain-conductor interface in
response to the temperature difference between the two systems. In this setup,
the current is given by the convolution of the local spin susceptibilities of
the spin chain and the conductor. We find the spin current to be fully
controlled, both in the magnitude and the sign, by the backscattering
interaction between spinons, fractionalized spin excitations of the Heisenberg
chain. In particular, it vanishes when the spinons form a non-interacting
spinon gas. Our analytical results for the local spin susceptibility at the
open end of the spin chain are in excellent agreement with numerical DMRG
simulations.
| Search Query: ArXiv Query: search_query=au:”Leon Balents”&id_list=&start=0&max_results=3