Faculté des sciences

Electronic Liquid Crystal State in the High-Temperature Superconductor YBa₂Cu₃O6.45

Hinkov, V. ; Haug, D. ; Fauqué, B. ; Bourges, P. ; Sidis, Y. ; Ivanov, A. ; Bernhard, Christian ; Lin, C. T. ; Keimer, B.

In: Science, 2008, vol. 319, p. 597-600

Electronic phases with symmetry properties matching those of conventional liquid crystals have recently been discovered in transport experiments on semiconductor heterostructures and metal oxides at millikelvin temperatures. We report the spontaneous onset of a one-dimensional, incommensurate modulation of the spin system in the high-transition-temperature superconductor... Plus

Ajouter à la liste personnelle
    Summary
    Electronic phases with symmetry properties matching those of conventional liquid crystals have recently been discovered in transport experiments on semiconductor heterostructures and metal oxides at millikelvin temperatures. We report the spontaneous onset of a one-dimensional, incommensurate modulation of the spin system in the high-transition-temperature superconductor YBa₂Cu₃O6.45 upon cooling below ∼150 kelvin, whereas static magnetic order is absent above 2 kelvin. The evolution of this modulation with temperature and doping parallels that of the in-plane anisotropy of the resistivity, indicating an electronic nematic phase that is stable over a wide temperature range. The results suggest that soft spin fluctuations are a microscopic route toward electronic liquid crystals and that nematic order can coexist with high-temperature superconductivity in underdoped cuprates.