Phys. Rev. Lett. 102, 046803 (2009) [4 pages]Nature of the Spin Transition in the Half-filled Landau LevelReceived 3 November 2008; published 27 January 2009 We report transport and nuclear spin relaxation studies of a density tunable two-dimensional electron system at filling ν=1/2 in tilted magnetic fields. The transition from partial to full spin polarization with an in-plane field leaves a clear signature in the resistance. Nuclear spin relaxation studies suggest that puddles of minority spins are responsible for an observed non-Korringa temperature dependence. This inhomogeneous spin polarization, similarly encountered in manganites where it strongly affects resistance, may help with understanding the spin dependent transport at ν=1/2. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.046803
DOI:
10.1103/PhysRevLett.102.046803
PACS:
73.40.−c, 73.20.−r, 73.63.Hs
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