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78 papers · 2 filters
Universal Decomposition of the Low-Frequency Conductivity Spectra of Iron-Pnictides Uncovering Fermi-Liquid Behavior
D. Wu, N. Barisic, P. Kallina +9
Infrared reflectivity measurements on 122 iron-pnictides reveal the existence of two electronic subsystems. The one gapped due to the spin-density-wave transition in the parent mat…
Superconductivity at 31 K in 111 type iron arsenide superconductor NaxFeAs induced by pressure
S. J. Zhang, X. C. Wang, Q. Q. Liu +8
The effect of pressure on superconductivity of 111 type NaxFeAs is investigated through temperature dependent electrical resistance measurement in a diamond anvil cell. The superco…
Unusual disorder effects in superconducting LaFeAs_(1-d)O_0.9F_0.1 as revealed by NMR spectroscopy
F. Hammerath, S. -L. Drechsler, H. -J. Grafe +6
We report 75As NMR measurements of the spin-lattice relaxation in the superconducting state of LaFeAsO_(0.9)F_(0.1) and As-deficient LaFeAs_(1-d)O_0.9F_0.1. The temperature behavio…
Unusual Electronic Structure and Observation of Dispersion Kink in CeFeAsO Parent Compound of FeAs-Based Superconductors
Haiyun Liu, G. F. Chen, Wentao Zhang +17
We report the first comprehensive high-resolution angle-resolved photoemission measurements on CeFeAsO, a parent compound of FeAs-based high temperature superconductors with a mang…
Momentum Dependence of the Single-Particle Self-Energy and Fluctuation Spectrum of Slightly Underdoped Bi_2 Sr_2 CaCu_2 O_{8+δ} from High Resolution Laser ARPES
Jin Mo Bok, Jae Hyun Yun, Han-Yong Choi +3
We deduce the normal state angle-resolved single-particle self-energy and the Eliashberg function (i.e., the product of the fluctuation spectrum and its coupling to fermi…
Point-contact spectroscopic studies on normal and superconducting AFe_2As_2-type iron-pnictide single crystals
Xin Lu, W. K. Park, H. Q. Yuan +11
Point-contact Andreev reflection spectroscopy (PCARS) is applied to investigate the gap structure in iron pnictide single crystal superconductors of the AFe_2As_2 (A=Ba, Sr) family…