TY  - JOUR
AU  - Wang, L. M.
AU  - Wang, Chih-Yi
AU  - Zen, Sha-Min
AU  - Chang, Jin-Yuan
AU  - Kuo, C. N.
AU  - Lue, C. S.
AU  - Chang, L. J.
AU  - Su, Y.
AU  - Wolf, Th
AU  - Adelmann, P.
TI  - 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
JO  - New journal of physics
VL  - 19
IS  - 3
SN  - 1367-2630
CY  - [Bad Honnef]
PB  - Dt. Physikalische Ges.
M1  - FZJ-2018-01472
SP  - 033039 -
PY  - 2017
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000398085100002
DO  - DOI:10.1088/1367-2630/aa649e
UR  - https://juser.fz-juelich.de/record/843949
ER  -