Light-Induced Superconductivity in a Stripe-Ordered Cuprate
Light-Induced Superconductivity in a Stripe-Ordered Cuprate
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DOI：
10.1126/science.1197294
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发表时间：
2011-01-14
期刊：
影响因子：
56.9
通讯作者：
Cavalleri, A.
中科院分区：
文献类型：
--
作者：
Fausti, D.;Tobey, R. I.;Cavalleri, A.
一些高温铜超导体最有趣的特征之一是一维“条纹”自旋顺序和电荷顺序之间的相互作用，以及超导性。我们使用中红外飞秒脉冲将一种非超导的条纹有序化合物La1.675Eu0.2Sr0.125CuO4转化为瞬态三维超导体。相干层间输运的出现是由c轴光学性质中约瑟夫森等离子体共振的迅速出现证明的。形成超导相所需的时间上限估计为1到2皮秒，这比预期的要快得多。这对我们理解条纹顺序及其与超导性的关系提出了严格的新限制。
One of the most intriguing features of some high-temperature cuprate superconductors is the interplay between one-dimensional "striped" spin order and charge order, and superconductivity. We used mid-infrared femtosecond pulses to transform one such stripe-ordered compound, nonsuperconducting La1.675Eu0.2Sr0.125CuO4, into a transient three-dimensional superconductor. The emergence of coherent interlayer transport was evidenced by the prompt appearance of a Josephson plasma resonance in the c-axis optical properties. An upper limit for the time scale needed to form the superconducting phase is estimated to be 1 to 2 picoseconds, which is significantly faster than expected. This places stringent new constraints on our understanding of stripe order and its relation to superconductivity.