Commensurate quantum oscillations in coupled qubits

Superfluid density measurements ofBa(CoxFe1−x)2Yong1, Lee2, Jiang3 et al. 2011Phys. Rev. B346350View full textAdd to dashboardCite

“…Superfluid density measurements provide an excellent characterization of the quality of superconducting materials, and, when applied to high-quality films, they provide detailed and fundamental information about the superconducting state, as described below. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]) Studies 1 through 6 probe the magnetic penetration depth, λ(T), either directly or indirectly through the conductivity sum rule, which yields the superfluid density, n s ∝ λ -2 . (As discussed below, λ -2 is often referred to as the "superfluid density", because the two quantities are proportional.…”

Out-of-Plane Momentum and Symmetry-Dependent Energy Gap of the PnictideBa0.6K0.4Fe2As2Superconductor Revealed by Angle-Resolved Photoemission Spectroscopy

“…However, there is conflicting experimental evidence for the presence of nodes and nodeless superconducting gaps [3,4]. Furthermore, strongly anisotropic and multiple gap behavior has been deduced based on transport measurements [5][6][7]. One possible cause of these controversies is the multiband nature of iron-based superconductors that all the five Fe 3d orbitals participate in the low-lying electronic structure, giving hole pockets at the zone center and electron pockets at the zone corner [8,9].…”

Incoherentc-Axis Interplane Response of the Iron ChalcogenideFeTe0.55Se0.45Superconductor from Infrared Spectroscopy

“…The layered cuprates as well as other layered selenides may be regarded as particularly relevant reference materials to compare and contrast various aspects of the interlayer response. Up to now, optical studies on the Fe-based superconductors have been mostly focused on the ab plane responses [7][8][9][10][11][12][13][14][15][16] and much less is known about the c axis properties. Existing studies on the c axis optical properties are limited to undoped AFe 2 As 2 (A=Ba, Sr, and Eu) [17,18] and one single superconductor Ba 0.67 K 0.33 Fe 2 As 2 [19].…”