%0 Journal Article
%A Wang, L. M.
%A Wang, Chih-Yi
%A Zen, Sha-Min
%A Chang, Jin-Yuan
%A Kuo, C. N.
%A Lue, C. S.
%A Chang, L. J.
%A Su, Y.
%A Wolf, Th
%A Adelmann, P.
%T Non-Fermi-liquid to Fermi-liquid transports in iron-pnictide Ba(Fe 1− x Co x ) 2 As 2 and the electronic correlation strength in superconductors newly probed by the normal-state Hall angle
%J New journal of physics
%V 19
%N 3
%@ 1367-2630
%C [Bad Honnef]
%I Dt. Physikalische Ges.
%M FZJ-2018-01472
%P 033039 -
%D 2017
%X Electrical transports in iron-pnictide Ba(Fe1−x Co x )2As2 (BFCA) single crystals are heavily debated in terms of the hidden Fermi-liquid (HFL) and holographic theories. Both HFL and holographic theories provide consistent physic pictures and propose a universal expression of resistivity to describe the crossover of transports from the non-Fermi-liquid (FL) to FL behavior in these so-called 'strange metal' systems. The deduced spin exchange energy J and model-dependent energy scale W in BFCA are almost the same, or are of the same order of several hundred Kelvin for over-doped BFCA, which is in agreement with the HFL theory. Moreover, a drawn line of W/3.5 for BFCA in the higher-doping region up to the right demonstrates the crossover from non-FL-like behavior to FL-like behavior at high doping, and shows a new phase diagram of BFCA. The electronic correlation strength in superconductors has been newly probed by the normal-state Hall angle, which found that, for the first time, correlation strength can be characterized by the ratios of T c to the Fermi temperature T F, J/T F, and the transverse mass to longitudinal mass.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000398085100002
%R 10.1088/1367-2630/aa649e
%U https://juser.fz-juelich.de/record/843949