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A Sharp Peak of the Zero-Temperature Penetration Depth at Optimal Composition in BaFe2(As1-xPx)2
K. Hashimoto, K. Cho, T. Shibauchi +14
In a superconductor, the ratio of the carrier density, , to their effective mass, , is a fundamental property directly reflecting the length scale of the superfluid flow, t…
Electron irradiation of Co, Ni, and P-doped BaFe2As2 - type iron-based superconductors
Cornelis Jacominus Van Der Beek, Sultan Demirdis, Dorothée Colson +7
High energy electron irradiation is used to controllably introduce atomic-scale point defects into single crystalline Ba(Fe_1-xCo_x)_2As_2, Ba(Fe_1-xNi_x)_2As_2, and BaFe_2(As_1-xP…
Infrared Measurement of the Pseudogap in P-Doped and Co-Doped BaFe2As2 High-Temperature Superconductors
S. J. Moon, A. A. Schafgans, S. Kasahara +10
We report on infrared studies of charge dynamics in a prototypical pnictide system: the BaFe2As2 family. Our experiments have identified hallmarks of the pseudogap state in the BaF…
Nematic and meta-nematic transitions in the iron pnictides
S. Kasahara, H. J. Shi, K. Hashimoto +8
Strongly interacting electrons can exhibit novel collective phases, among which the electronic nematic phases are perhaps the most surprising as they spontaneously break rotational…
Thermodynamic phase diagram and phase competition in BaFe2(As1-xPx)2 studied by thermal expansion
A. E. Böhmer, P. Burger, F. Hardy +11
High-resolution thermal-expansion and specific-heat measurements were performed on single crystalline BaFe2(As1-xPx)2 (0 < x < 0.33, x = 1). The observation of clear anomalies allo…