Multiband model for penetration depth in MgB2

Abstract

The results of first principles calculations of the electronic structure and the electron-phonon interaction in MgB2 are used to study theoretically the temperature dependence and anisotropy of the magnetic field penetration depth. The effects of impurity scattering are essential for a proper description of the experimental results. We compare our results with experimental data and we argue that the two-band model describes the data rather well.

submitted to Phys. Rev. B

References in corpus (30)

• Superconductivity of metallic boron in MgB_2
• Beyond Eliashberg superconductivity in MgB2: anharmonicity, two-phonon scattering, and multiple gaps
• Superconductivity of MgB2: Covalent Bonds Driven Metallic
• Superconductivity in Dense $Mg{B}_2$ Wires
• Evidence for two superconducting energy gaps in MgB2 by point-contact spectroscopy
• Specific Heat of Mg ^{11}B_2
• Phonon dispersion and electron-phonon coupling in MgB_2 and AlB_2
• Two Gap State Density in MgB${}_2$: A True Bulk Property or A Proximity Effect?
• First-Principles Calculation of the Superconducting Transition in MgB2 within the Anisotropic Eliashberg Formalism
• Specific heat in the superconducting and normal state (2-300 K, 0-16 Teslas), and magnetic susceptibility of the 38-K superconductor MgB2: evidence for a multicomponent gap
• Multiband model for tunneling in MgB2 junctions
• Evidence for Two Superconducting Gaps in $Mg{B}_2$
• Direct evidence for a multiple superconducting gap in MgB2 from high-resolution photoemission spectroscopy
• Tunneling spectroscopy in small grains of superconducting MgB2
• Order parameter of MgB_2: a fully gapped superconductor
• Exponential Temperature Dependence of Penetration Depth in Single Crystal MgB_2
• Far-infrared optical conductivity gap in superconducting MgB2 films
• Macroscopic anisotropy in superconductors with anisotropic gaps
• de Haas-van Alphen effect in single crystal MgB_2
• Optical conductivity and penetration depth in MgB2
• Muon-spin-relaxation study of the magnetic penetration depth in MgB2
• Penetration Depth Measurements in MgB_2: Evidence for Unconventional Superconductivity
• Josephson effect in MgB_2 break junctions
• Interpretation of the de Haas - van Alphen experiments in MgB2
• Manifestation of multiband optical properties of MgB${}_2$
• Lower Critical Field at Odds with A S-Wave Superconductivity in The New Superconductor $Mg{B}_2$
• The structure of the superconducting gap in MgB2 from point-contact spectroscopy
• Symmetry and Temperature dependence of the Order parameter in MgB2 from point contact measurements
• Energy gap and proximity effect in $Mg{B}_2$ superconducting wires
• Characteristic features of the temperature dependence of the surface impedance in polycrystalline MgB${}_2$ samples

Cited by in corpus (85)

• Enhancement of the upper critical field by nonmagnetic impurities in dirty two-gap superconductors
• Band filling and interband scattering effects in MgB${}_2$: C vs Al doping
• Limits of the upper critical field in dirty two-gap superconductors
• Specific heat of single crystal MgB_2: a two-band superconductor with two different anisotropies
• Disorder induced transition between s_+- and s_++ states in two-band superconductors
• A review of two-band superconductivity: materials and effects on the thermodynamic and reversible mixed-state properties
• Superfluid density and specific heat within self-consistent scheme for two-band superconductor
• Properties of the superconducting state in a two-band model
• Upper critical field in dirty two-band superconductors: breakdown of the anisotropic Ginzburg-Landau theory
• Evidence for Two Gaps and Breakdown of the Uemura Plot in Ba${}_{0.6}$K${}_{0.4}$Fe${}_2$As${}_2$ Single Crystals
• Temperature dependent anisotropy of the penetration depth and coherence length in MgB$_2
• Bosons in high temperature superconductors: an experimental survey
• Anisotropies of the lower and upper critical fields in MgB${}_2$ single crystals
• Using controlled disorder to distinguish $s_{\pm }$ and $s_{++}$ gap structure in Fe-based superconductors
• Multigap superconductivity in sesquicarbides La${}_2$C${}_3$ and Y${}_2$C${}_3$
• Scanning SQUID microscopy of vortex clusters in multiband superconductors
• Two-band Eliashberg equations and the experimental Tc of the diboride Mg1-xAlxB2
• Prediction of phonon-mediated high temperature superconductivity in stoichiometric Li${}_2$B${}_3$C
• Is ZrB12 two gap superconductor?
• Specific-heat measurements of superconducting NbS2 single crystal in an external magnetic field: Study on the energy gap structure
• Intrinsic pinning and the critical current scaling of clean epitaxial Fe(Se,Te) thin films
• Energy gap, penetration depth and surface resistance of MgB2 thin films determined by microwave resonator mesurements
• Evidence for strong electron-phonon coupling in MgCNi_3
• Effect of two gaps on the flux lattice internal field distribution: evidence of two length scales from muSR in Mg1-xAlxB2
• Anomalous microwave conductivity coherence peak in c-axis MgB2 thin film
• Thermodynamically stable noncomposite vortices in mesoscopic two-gap superconductors
• Single gap superconductivity in beta-Bi2Pd
• Anomalous Flux Flow Resistivity in Two Gap Superconductor MgB_2
• Two-band Effects in the Angular Dependence of Hc2 of MgB2 Single Crystals
• Impurities in multiband superconductors
• Anisotropy of the upper critical field in MgB2: the two-gap Ginzburg-Landau theory
• Thermally-activated current transport in MgB_2 films
• Influence of Al doping on the critical fields and gap values in magnesium diboride single crystals
• Electronic, dynamical and superconducting properties of CaBeSi
• The effect of magnetic impurities in a two-band superconductor: A point-contact study of Mn-substituted MgB2 single crystals
• Thermal conductivity of MgB${}_2$ in the superconducting state
• Manifestation of impurity induced s_{+-} -> s_{++} transition: multiband model for dynamical response functions
• A Study of Carbon Substitutions in MgB_2 within the two-band Eliashberg theory
• Effective gap at microwave frequencies in MgB2 thin films with strong interband scattering
• Advances in point-contact spectroscopy: two-band superconductor MgB2 (A review)
• Point-contact spectroscopy in neutron-irradiated Mg^{11}B_2
• Direct measurement of the magnetic penetration depth by magnetic force microscopy
• Analysis of the London penetration depth in Ni-doped CaKFe4As4
• Multiband and impurity effects in infrared and optical spectra of MgB2
• Anisotropy and internal field distribution of MgB2 in the mixed state at low temperatures
• Nonlinear microwave response of MgB2
• Anisotropy of the superconducting state properties and phase diagram of MgB2 by torque magnetometry on single crystals
• Penetration depth anisotropy in two-band superconductors
• Optical Study of LaO_0.9F_0.1FeAs: Evidence for a Weakly Coupled Superconducting State
• Two-band parallel conductivity at terahertz frequencies in the superconducting state of MgB${}_2$.
• muSR study of carbon-doped MgB2 superconductors
• $\mu$SR study of noncentrosymmetric superconductor PbTaSe${}_2$
• Upper critical magnetic field in Ba_0.68K_0.32Fe_2As_2 and Ba(Fe_0.93Co_0.07)_2As_2
• Reversible magnetization measurement of the anisotropy of the London penetration depth in MgB2 single crystals
• S-wave superconductivity probed by measuring magnetic penetration depth and lower critical field of MgCNi${}_3$ single crystals
• Absence of a boron isotope effect in the magnetic penetration depth of MgB${}_2$
• Microwave conductivity in the ferropnictides with specific application to Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Measuring the Penetration Depth Anisotropy in MgB${}_2$ using Small-Angle Neutron Scattering
• Prominent Cooper Pairing Away From the Fermi Level and its Spectroscopic Signature in Twisted Bilayer Graphene
• First critical field measurements of superconducting films by third harmonic analysis
• Coherence lengths and anisotropy in MgB2 superconductor
• Probing the electron-phonon coupling in MgB2 through magnetoresistance measurements in neutron irradiated thin films
• Pressure dependence of critical temperature in MgB2 and two bands Eliashberg theory
• Electron transport, penetration depth and upper critical magnetic field of ZrB12 and MgB2
• Multiband superconductivity in Pb, H under pressure and CaBeSi from {\it ab-initio} calculations
• Measurement of the magnetic penetration depth of a superconducting MgB${}_2$ thin film with a large intraband diffusivity
• Effects of Ion Milling on the Microwave Properties of MgB2 Films
• Roles of intrinsic anisotropy and pi-band pairbreaking effects on critical currents in tilted c-axis MgB2 films probed by magneto-optical and transport measurements
• A phenomenological multiband Eliashberg model for LiFeAs
• Influence of electron-phonon coupling strength on signatures of even and odd-frequency superconductivity
• Inhomogeneous superconductivity in LuxZr1-xB12 dodecaborides with dynamic charge stripes
• Microwave surface resistance of pristine and neutron-irradiated MgB2 samples in magnetic field
• Normal and superconducting properties of LiFeAs explained in the framework of four-band Eliashberg Theory
• Band filling and disorder effects on the normal state thermoelectric behavior in MgB2
• Doping evolution of the gap structure and spin-fluctuation pairing in $Ba(F{e}_{1-x}C{o}_x{)}_{2}A{s}_2$ superconductors
• ${}^{11}$B NMR study of pure and lightly carbon doped MgB${}_2$ superconductors
• Anisotropy and Penetration Depth of MgB${}_2$ from ${}^{11}$B NMR
• Microwave Harmonic Emission in MgB2 Superconductor: Comparison with YBaCuO
• Anisotropic superconductivity in the quasi-one-dimensional superconductor V${}_2$Ga${}_5$
• Near-Tc second-harmonic emission in high-density bulk MgB2 at microwave frequency
• The study on penetration depth of anisotropic two-band s-wave superconductors by Ginzburg-Landau approach
• Magnetic field induced orientation of superconducting MgB${}_2$ crystallites determined by X-ray diffraction
• Anisotropic properties of MgB2 by torque magnetometry
• Consequences of the peculiar intrinsic properties of MgB2 on its macroscopic current flow
• Josephson effect in point contacts between two-band superconductors