Borzi R A, Grigera S A, Farrell J, Perry R S, Lister S J S, Lee S L, Tennant D A, Maeno Y, Mackenzie A P
Scottish Universities Physics Alliance, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9SS, UK.
Science. 2007 Jan 12;315(5809):214-7. doi: 10.1126/science.1134796. Epub 2006 Nov 23.
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.
原则上，强相互作用电子的复杂集合体可以自组织成各种各样的集体态，但在实际中已被识别的此类态相对较少。我们报告，在变磁性量子临界点的紧邻区域，高纯度的钌酸锶Sr3Ru2O7具有很大的磁阻各向异性，这与电子向列流体的存在相一致。我们讨论了我们的观测结果与在砷化镓器件中的高纯度二维电子流体的观测结果之间惊人的唯象相似性。
