Magnetic and superconducting transitions inBa1−xKxFe2As2studied by specific heat

2009/10/02 by Ch. Kant, J. Deisenhofer, A. Günther +5
Business, Management and Accounting · Materials Science · Physics and Astronomy · #Corporate Taxation and Avoidance #Iron-based superconductors research #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.81.014529

published as Phys. Rev. B 81, 014529 (2010) · 5 pages, 4 figures, 2 tables

arxiv created 2009/10/02 · openalex publication_date 2010/01/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

We report on specific-heat measurements in Ba_1\ensuremath-xK_xFe₂As₂ (x\ensuremath≤0.6). For the underdoped sample with x=0.2, both the spin-density-wave transition at T=100 K and the superconducting transition at 23 K can be identified. After subtraction of the normal-state specific heat by appropriate Debye and Einstein contributions and the normal-state Sommerfeld coefficient, we can describe the electronic contribution to the specific heat in the superconducting state for concentrations 0.3\ensuremath≤x\ensuremath≤0.6 by a full single gap within the BCS limit.

Citations

• High-temperature superconductivity inEu0.5K0.5Fe2As2
• As<mml:mprescripts/><mml:none/>75NMR Studies of SuperconductingLaFeAsO0.9F0.1
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• Electronic Phase Separation in the Slightly Underdoped Iron Pnictide SuperconductorBa1−xKxFe2As2