TY  - JOUR
AU  - Zhang, Wenliang
AU  - Wei, Yuan
AU  - Xie, Tao
AU  - Liu, Zhaoyu
AU  - Gong, Dongliang
AU  - Ma, Xiaoyan
AU  - Hu, Ding
AU  - Čermák, Petr
AU  - Schneidewind, Astrid
AU  - Tucker, Gregory
AU  - Meng, Siqin
AU  - Huesges, Zita
AU  - Lu, Zhilun
AU  - Song, Jianming
AU  - Luo, Wei
AU  - Xu, Liangcai
AU  - Zhu, Zengwei
AU  - Yin, Xunqing
AU  - Li, Hai-Feng
AU  - Yang, Yi-feng
AU  - Luo, Huiqian
AU  - Li, Shiliang
TI  - Unconventional Antiferromagnetic Quantum Critical Point in Ba(Fe$_{0.97}$Cr$_{0.03}$)$_2$(As$_{1−x}$P$_x$)$_2$
JO  - Physical review letters
VL  - 122
IS  - 3
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2019-02806
SP  - 037001
PY  - 2019
AB  - We have systematically studied physical properties of BaðFe0.97Cr0.03Þ2ðAs1−xPxÞ2, where super-conductivity in BaFe2ðAs1−xPxÞ2is fully suppressed by just 3% of Cr substitution of Fe. A quantum criticalpoint is revealed atx∼0.42, where non-Fermi-liquid behaviors similar to those in BaFe2ðAs1−xPxÞ2areobserved. Neutron diffraction and inelastic neutron scattering measurements suggest that the quantumcritical point is associated with the antiferromagnetic order, which is not of conventional spin-density-wavetype as evidenced by theω=Tscaling of spin excitations. On the other hand, no divergence of low-temperature nematic susceptibility is observed whenxis decreased to 0.42 from higher doping level,demonstrating that there are no nematic quantum critical fluctuations. Our results suggest that non-Fermi-liquid behaviors in iron-based superconductors can be solely resulted from the antiferromagnetic quantumcritical fluctuations, which cast doubts on the role of nematic fluctuations played in the normal-stateproperties in iron-based superconductors.
LB  - PUB:(DE-HGF)16
C6  - pmid:30735415
UR  - <Go to ISI:>//WOS:000456782500010
DO  - DOI:10.1103/PhysRevLett.122.037001
UR  - https://juser.fz-juelich.de/record/862500
ER  -