Fate of charge order in overdoped La-based cuprates
Fate of charge order in overdoped La-based cuprates
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DOI：
10.1038/s41535-023-00539-w
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发表时间：
2022-06
影响因子：
5.7
通讯作者：
K. V. Arx;Qisi Wang;S. Mustafi;D. Mazzone;M. Horio;D. Mukkattukavil;E. Pomjakushina;S. Pyon;T. Takayama;H. Takagi;T. Kurosawa;N. Momono;M. Oda;N. Brookes;D. Betto;W. Zhang;T. Asmara;Y. Tseng;T. Schmitt;Y. Sassa;J. Chang
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文献类型：
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作者：
K. V. Arx;Qisi Wang;S. Mustafi;D. Mazzone;M. Horio;D. Mukkattukavil;E. Pomjakushina;S. Pyon;T. Takayama;H. Takagi;T. Kurosawa;N. Momono;M. Oda;N. Brookes;D. Betto;W. Zhang;T. Asmara;Y. Tseng;T. Schmitt;Y. Sassa;J. Chang
在高温铜氧化物超导体中，条纹序广义上指的是自旋和电荷的耦合调制，分别具有八个和四个晶格单元的排列。这种条纹顺序如何在最佳掺杂中演变仍然是一个有争议的问题。在这里，我们提出了一个系统的共振非弹性x射线散射研究的弱电荷相关的La 2 − xSrxCuO 4和La1.8−xEu0.2SrxCuO4。超高能量分辨率实验证明了非弹性和弹性散射过程分离的重要性。只有在最佳掺杂下才能发现长程温度依赖的条纹顺序。在较高的掺杂，短程温度无关的相关性是目前最高的掺杂测量。这种转变不同于赝能隙临界掺杂，并且抢先于赝能隙临界掺杂。我们认为，掺杂和温度无关的短程相关起源于未解决的电子-声子耦合，广泛的条纹有序矢量的峰值。在La 2 − xSrxCuO 4中，长程静态条纹有序在最佳掺杂附近消失，我们讨论了量子临界和交叉情况。
In high-temperature cuprate superconductors, stripe order refers broadly to a coupled spin and charge modulation with a commensuration of eight and four lattice units, respectively. How this stripe order evolves across optimal doping remains a controversial question. Here we present a systematic resonant inelastic x-ray scattering study of weak charge correlations in La2−xSrxCuO4and La1.8−xEu0.2SrxCuO4. Ultra high energy resolution experiments demonstrate the importance of the separation of inelastic and elastic scattering processes. Long-range temperature-dependent stripe order is only found below optimal doping. At higher doping, short-range temperature-independent correlations are present up to the highest doping measured. This transformation is distinct from and preempts the pseudogap critical doping. We argue that the doping and temperature-independent short-range correlations originate from unresolved electron–phonon coupling that broadly peaks at the stripe ordering vector. In La2−xSrxCuO4, long-range static stripe order vanishes around optimal doping and we discuss both quantum critical and crossover scenarios.