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Magnetic-field-induced charge-stripe order in the high-temperature superconductor YBa_2Cu_3O_y;

机译：高温超导体YBa_2Cu_3O_y中的磁场感应电荷条带顺序；

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摘要

Electronic charges introduced in copper-oxide (CuO_2) planes generate high-transition-temperature (T_c) superconductivity but, under special circumstances, they can also order into filaments called stripes~1. Whether an underlying tendency towards charge order is present in all copper oxides and whether this has any relationship with superconductivity are, however, two highly controversial issues~(2'3). To uncover underlying electronic order, magnetic fields strong enough to destabilize superconductivity can be used. Such experiments, including quantum oscillations4"6 in YBa_2Cu_3O_y (an extremely clean copper oxide in which charge order has not until now been observed) have suggested that superconductivity competes with spin, rather than charge, order~(7,9). Here we report nuclear magnetic resonance measurements showing that high magnetic fields actually induce charge order, without spin order, in the CuO_2 planes of YBa_2Cu_3O_y. The observed static, unidirectional, modulation of the charge density breaks translational symmetry, thus explaining quantum oscillation results, and we argue that it is most probably the same 4a-periodic modulation as in stripe-ordered copper oxides~1. That it develops only when superconductivity fades away and near the same 1/8 hole doping as in La_(2_x)Ba_xCuO_4 (ref. 1) suggests that charge order, although visibly pinned by CuO chains in YBa_2Cu_3O_p is an intrinsic propensity of the superconducting planes of high- T_c copper oxides.
机译：引入到氧化铜（CuO_2）平面中的电荷会产生高转变温度（T_c）超导性，但是在特殊情况下，它们也可以排列成称为条纹〜1的细丝。然而，所有氧化铜中是否都存在电荷趋向的基本趋势，以及它是否与超导性有任何关系，这是两个引起争议的问题（2'3）。为了揭示潜在的电子秩序，可以使用足以破坏超导稳定性的磁场。这样的实验，包括YBa_2Cu_3O_y中的量子振荡4“ 6（一种极干净的氧化铜，直到现在还没有观察到电荷顺序），表明超导电性与自旋竞争，而不是电荷〜（7,9）。核磁共振测量结果表明，高磁场实际上在YBa_2Cu_3O_y的CuO_2平面上感应出电荷序，而没有自旋序，观察到的电荷密度的静态，单向调制打破了平移对称性，从而解释了量子振荡的结果，我们认为它最有可能与条纹有序氧化铜〜1中的4a周期调制相同，只有在超导性消失并接近与La_（2_x）Ba_xCuO_4（ref。1）相同的1/8空穴掺杂时才会发展。尽管显然由YBa_2Cu_3O_p中的CuO链固定了电荷顺序，但这是高T_c铜氧化物超导平面的固有倾向。

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  • 来源
    《Nature》 |2011年第7363期|p.191-194|共4页
  • 作者

    Tao Wu; Hadrien Mayaffre; Steffen Kraemer; Mladen Horvatic; Claude Berthier; W. N. Hardy; Ruixing Liang; D. A. Bonn; Marc - Henri Julien;

  • 作者单位

    Laboratoire National des Champs Magnetiques Intenses, UPR 3228, CNRS-UJF-UPS-INSA, 38042 Grenoble, France;

    Laboratoire National des Champs Magnetiques Intenses, UPR 3228, CNRS-UJF-UPS-INSA, 38042 Grenoble, France;

    Laboratoire National des Champs Magnetiques Intenses, UPR 3228, CNRS-UJF-UPS-INSA, 38042 Grenoble, France;

    Laboratoire National des Champs Magnetiques Intenses, UPR 3228, CNRS-UJF-UPS-INSA, 38042 Grenoble, France;

    Laboratoire National des Champs Magnetiques Intenses, UPR 3228, CNRS-UJF-UPS-INSA, 38042 Grenoble, France;

    Department of Physics and Astronomy, University of British Columbia, Vancouver,British Columbia V6T1Z1, Canada Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada;

    Department of Physics and Astronomy, University of British Columbia, Vancouver,British Columbia V6T1Z1, Canada Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada;

    Department of Physics and Astronomy, University of British Columbia, Vancouver,British Columbia V6T1Z1, Canada Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada;

    Laboratoire National des Champs Magnetiques Intenses, UPR 3228, CNRS-UJF-UPS-INSA, 38042 Grenoble, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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