Ubiquitous signatures of nematic quantum criticality in optimally doped Fe-based superconductors
2016; American Association for the Advancement of Science; Volume: 352; Issue: 6288 Linguagem: Inglês
10.1126/science.aab0103
ISSN1095-9203
AutoresHsueh-Hui Kuo, Jiun‐Haw Chu, Johanna C. Palmstrom, Steven A. Kivelson, I. R. Fisher,
Tópico(s)Rare-earth and actinide compounds
ResumoDiscerning the nematic connection The phase diagram of any given family of iron-based superconductors is complicated: Superconductivity competes with antiferromagnetism, with a structural transition often thrown in for good measure. Transport experiments have shown that in one of these families, Ba(Fe 1- x Co x )2As 2 , a rotational electronic asymmetry, dubbed nematicity, drives the structural transition. Kuo et al. detected nematic fluctuations in five Fe-based superconductor families in the vicinity of optimal chemical doping: the doping that maximizes the superconducting transition temperature. Thus, nematicity may play a role in the mechanism of superconductivity in these compounds. Science , this issue p. 958
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