Enhancement of the London penetration depth in pnictides at the onset of SDW order under superconducting dome

Abstract

Recent measurements of the doping dependence of the London penetration depth λ(x) at low temperatures in clean samples of isovalent BaFe_2[As_(1-x)P_x]_2 at T<<Tc [Hashimoto et al., Science 336, 1554 (2012)] revealed a peak in λ(x) near optimal doping x=0.3. The observation of the peak at T<<Tc, points to the existence of the quantum critical point (QCP) beneath the superconducting dome. We associate such a QCP with the onset of a spin- density-wave order and show that the renormalization of λ(x) by critical magnetic fluctuations, gives rise to the observed feature. We argue that the case of pnictides is conceptually different from a one-component Galilean invariant Fermi liquid, for which correlation effects do not cause the renormalization of the London penetration depth at T=0.

16 pages, 5 figures

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Cited by in corpus (46)

• Quantum critical point lying beneath the superconducting dome in iron-pnictides
• Ironing out the details of unconventional superconductivity
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• Quasiparticle mass enhancement close to the quantum critical point in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Competing Orders in a Nearly Antiferromagnetic Metal
• Direct evidence for the emergence of a pressure induced nodal superconducting gap in the iron-based superconductor Ba_0.65Rb_0.35Fe_2As_2
• Singularity of the London penetration depth at quantum critical points in superconductors
• How many quantum phase transitions exist inside the superconducting dome of the iron pnictides?
• Optical conductivity of iron-based superconductors
• Local characterization of superconductivity in BaFe2(As1-xPx)2
• Shear sound of two-dimensional Fermi liquids
• Effect of magnetic criticality and Fermi-surface topology on the magnetic penetration depth
• Electron Mass Enhancement near a Nematic Quantum Critical Point in NaFe${}_{1-x}$Co${}_x$As
• Competition between superconductivity and magnetic/nematic order as a source of anisotropic superconducting gap in underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Quantum phase transition inside the superconducting dome of Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ probed by optical magneto-sensing using NV-centers in diamond
• Anomalous Scaling of the Penetration Depth in Nodal Superconductors
• Phase transition beneath the superconducting dome in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Magnetic penetration depth in disordered iron-based superconductors
• Global phase diagram of a spin-orbital Kondo impurity model and the suppression of Fermi-liquid scale
• Order parameter fluctuation and ordering competition in $\mathrm{B}{\mathrm{a}}_{1-\mathrm{x}}{\mathrm{K}}_{\mathrm{x}}\mathrm{F}{\mathrm{e}}_2\mathrm{A}{\mathrm{s}}_2$
• Topological Phase Transitions in Line-nodal Superconductors
• London penetration depth measurements using tunnel diode resonators
• Thermodynamic signatures of an antiferromagnetic quantum critical point inside a superconducting dome
• Effect of SDW fluctuations on the specific heat jump in iron pnictides at a superconducting transition
• Evolution of quasiparticle excitations with critical mass enhancement in superconducting AFe2As2 (A = K, Rb, and Cs)
• Anomalous thermodynamic properties of quantum critical superconductors
• Possible unconventional pairing in $(\text{Ca,Sr}{)}_3(\text{Ir,Rh}{)}_4{\text{Sn}}_{13}$ superconductors revealed by controlling disorder
• Hidden Order as a Source of Interface Superconductivity
• Diamagnetic Vortex Barrier Stripes in Underdoped $BaF{e}_2(A{s}_{1-x}{P}_x{)}_2$
• Impact of ordering competition on the global phase diagram of iron pnictides
• Topological Defects in Systems with Two Competing Order Parameters: Application to Superconductors with Charge- and Spin-Density Waves
• Dependence of the absolute value of the penetration depth in $(\mathbf{B}{\mathbf{a}}_{1-\mathbf{x}}{\mathbf{K}}_{\mathbf{x}})\mathbf{F}{\mathbf{e}}_2\mathbf{A}{\mathbf{s}}_2$ on doping
• Selective mass enhancement close to the quantum critical point in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Anomalous sharp peak in the London penetration depth induced by the nodeless-to-nodal superconducting transition in BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Inhomogeneous magnetic multiband superconductors
• Cluster structure of superconducting phase and the nature of peaks in the doping dependences of the London penetration depth in iron pnictides
• Incommensurate magnetic states induced by ordering competition in $\mathrm{B}{\mathrm{a}}_{1-\mathrm{x}}\mathrm{N}{\mathrm{a}}_{\mathrm{x}}\mathrm{F}{\mathrm{e}}_2\mathrm{A}{\mathrm{s}}_2$
• Time-dependent equation for the magnetic order parameter near the quantum critical point in multiband superconductors with a spin density wave
• Thermodynamic properties of nodal superconductors close to a magnetic quantum critical point
• Josephsonic diagnostic of competing orders in quantum critical multiband superconductors
• Interacting fermions in narrow-gap semiconductors with band inversion
• Transport anomalies in multiband superconductors near quantum critical point
• Impurity bands in magnetic superconductors with spin density wave
• Magnetic Quantum Criticality inside the Superconducting State Revealed by Penetration Depth Scaling with Local $T_{\mathrm{c}}$
• Quasiclassical theory of $C_4$-symmetric magnetic order in disordered multiband metals
• Reaching Quantum Critical Point by Adding Non-magnetic Disorder in Single Crystals of Superconductor $({\text{Ca}}_x{\text{Sr}}_{1-x}{)}_3{\text{Rh}}_4{\text{Sn}}_{13}$