Formation of a Nematic Fluid at High Fields in Sr3Ru2O7

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Science  12 Jan 2007:
Vol. 315, Issue 5809, pp. 214-217
DOI: 10.1126/science.1134796

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In principle, a complex assembly of strongly interacting electrons can self-organize into a wide variety of collective states, but relatively few such states have been identified in practice. We report that, in the close vicinity of a metamagnetic quantum critical point, high-purity strontium ruthenate Sr3Ru2O7 possesses a large magnetoresistive anisotropy, consistent with the existence of an electronic nematic fluid. We discuss a striking phenomenological similarity between our observations and those made in high-purity two-dimensional electron fluids in gallium arsenide devices.

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