Nematic quantum criticality in an Fe-based superconductor revealed by strain-tuning

doi:10.1126/science.abb9280

GSTDTAP > 气候变化

DOI	10.1126/science.abb9280
	Nematic quantum criticality in an Fe-based superconductor revealed by strain-tuning
	Thanapat Worasaran; Matthias S. Ikeda; Johanna C. Palmstrom; Joshua A. W. Straquadine; Steven A. Kivelson; Ian R. Fisher
	2021-05-28
发表期刊	Science
出版年	2021
英文摘要	Iron-based superconductors are believed to host a quantum critical point (QCP), a zero-temperature phase transition, beneath the “dome” delineating the superconducting phase. Elucidating the nature of this QCP is, however, tricky. Worasaran et al. set out to do just that in a prototypical iron-based superconductor, barium iron arsenide. By applying strain to their samples, the researchers found power-law behaviors that are characteristic of nematic quantum criticality. The associated quantum fluctuations were present over a large portion of the phase diagram. This method may be useful in studying quantum criticality in other material systems. Science , abb9280, this issue p. [973][1] Quantum criticality may be essential to understanding a wide range of exotic electronic behavior; however, conclusive evidence of quantum critical fluctuations has been elusive in many materials of current interest. An expected characteristic feature of quantum criticality is power-law behavior of thermodynamic quantities as a function of a nonthermal tuning parameter close to the quantum critical point (QCP). Here, we observed power-law behavior of the critical temperature of the coupled nematic/structural phase transition as a function of uniaxial stress in a representative family of iron-based superconductors, providing direct evidence of quantum critical nematic fluctuations in this material. These quantum critical fluctuations are not confined within a narrow regime around the QCP but rather extend over a wide range of temperatures and compositions. [1]: /lookup/doi/10.1126/science.abb9280
领域	气候变化 ; 资源环境
URL	查看原文
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/328869
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Thanapat Worasaran,Matthias S. Ikeda,Johanna C. Palmstrom,et al. Nematic quantum criticality in an Fe-based superconductor revealed by strain-tuning[J]. Science,2021.
APA	Thanapat Worasaran,Matthias S. Ikeda,Johanna C. Palmstrom,Joshua A. W. Straquadine,Steven A. Kivelson,&Ian R. Fisher.(2021).Nematic quantum criticality in an Fe-based superconductor revealed by strain-tuning.Science.
MLA	Thanapat Worasaran,et al."Nematic quantum criticality in an Fe-based superconductor revealed by strain-tuning".Science (2021).