AC magnetization transport and power absorption in non-itinerant spin chains

Details AC magnetization transport and power absorption in non-itinerant spin chains AC magnetization transport and power absorption in non-itinerant spin chains

2008-04-23

arxiv.org/abs/0804.3697v1

Phys. Rev. Lett. 101, 017202 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 2 figures

Scientific paper

10.1103/PhysRevLett.101.017202

We investigate the ac transport of magnetization in non-itinerant quantum systems such as spin chains described by the XXZ Hamiltonian. Using linear response theory, we calculate the ac magnetization current and the power absorption of such magnetic systems. Remarkably, the difference in the exchange interaction of the spin chain itself and the bulk magnets (i.e. the magnetization reservoirs), to which the spin chain is coupled, strongly influences the absorbed power of the system. This feature can be used in future spintronic devices to control power dissipation. Our analysis allows to make quantitative predictions about the power absorption and we show that magnetic systems are superior to their electronic counter parts.

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