Measurements of the Anisotropic In-Plane Resistivity of Underdoped FeAs-Based Pnictide Superconductors
J. J. Ying, X. F. Wang, T. Wu, Z. J. Xiang, R. H. Liu, Y. J. Yan, A. F. Wang, M. Zhang, G. J. Ye, P. Cheng, J. P. Hu, X. H. Chen
DOI 10.1103/PhysRevLett.107.067001 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We systematically investigated the in-plane resistivity anisotropy of electron-underdoped EuFe2−xCoxAs2 and BaFe2−xCoxAs2 and hole-underdoped Ba1−xKxFe2As2. Large in-plane resistivity anisotropy was found in the former samples, while tiny in-plane resistivity anisotropy was detected in the latter ones. When it is detected, the anisotropy starts above the structural transition temperature and increases smoothly through it. As the temperature is lowered further, the anisotropy takes a dramatic enhancement through the magnetic transition temperature. We found that the anisotropy is universally tied to the presence of T-linear behavior of resistivity. Our results demonstrate that the nematic state is caused by electronic degrees of freedom, and the microscopic orbital involvement in the magnetically ordered state must be fundamentally different between the hole- and electron-doped materials.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| EuFe2-xCoxAs2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| BaFe2-xCoxAs2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba1-xKxFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Decoupling of the superconducting and magnetic/structural phase transitions in electron-doped BaFe2As2
similarity 0.95P. C. Canfield et al.
Source status unknown — claims are unverified
Unconventional Hall Effect in Pnictides from Interband Interactions
similarity 0.94L. Fanfarillo et al.
Source status unknown — claims are unverified
Local Measurement of the Superfluid Density in the Pnictide Superconductor Ba(Fe1−xCox)2As2 across the Superconducting Dome
similarity 0.94Lan Luan et al.
Source status unknown — claims are unverified
Distinct electronic nematicities between electron and hole underdoped iron pnictides
similarity 0.94J. J. Ying et al. · 2010 · arXiv:1012.2731
Source status unknown — claims are unverified
Spin dynamics in electron-doped iron pnictide superconductors
similarity 0.94Yi Gao et al.
Source status unknown — claims are unverified
Nonlinear uniaxial pressure dependence of Tc in iron-based superconductors
similarity 0.94Zhaoyu Liu et al.
Source status unknown — claims are unverified