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Condensed Matter Colloquium Thursday, January 26, 2012

Summary: Condensed Matter Colloquium
Thursday, January 26, 2012
2 pm, Room 1201
Refreshments at 1:30 pm in Room 1305F
Sergio Valenzuela
ICREA & Catalan Institute of Nanotechnology, Barcelona, Spain
Spin currents and spin dynamics in
metallic nanostructures
Spintronics aims to replace charge with spin as the main computational element in devices.
Much effort is being devoted to understand how the electron spin is transferred through
interfaces and to identify fundamental processes that modify the spin polarization or that
can be used for spin manipulation. Lateral structures are a unique tool to study these
phenomena because of the ease to fabricate them in multi-terminal configurations. In the
first part of the talk, this will be illustrated with some of our experimental results in thin-film
nonlocal spin devices, where the output voltage is exclusively determined by the spin degree
of freedom and provides valuable information on spin-flip scattering mechanisms, spin-
polarized tunneling, and spin Hall effects. In the second part of the talk, new aspects of
thermoelectricity associated to spin effects will be addressed. Such effects are expected to
be beneficial for energy conversion applications and for the search of novel pathways
towards transporting spin information using magnons (spin-wave quanta). First, a spin


Source: Appelbaum, Ian - Department of Physics, University of Maryland at College Park


Collections: Engineering; Materials Science