Specific Heat of Mg ^{11}B_2

Abstract

Measurements of the specific heat of Mg ^{11}B_2 (MgB2), from 1 to 50 K, in magnetic fields to 9 T, give the Debye temperature, $\Theta$ = 1050 K, the coefficient of the normal-state electron contribution, ${\gamma }_n$ = 2.6 mJ mol^{-1} K^{-2}, and a discontinuity in the zero-field specific heat of 133 mJ mol^{-1} K^{-1} at $T_c$ = 38.7 K. The estimated value of the electron-phonon coupling parameter, $\lambda$ = 0.62, could account for the observed $T_c$ only if the important phonon frequencies are unusually high relative to $\Theta$. At low $T$, there is a strongly field-dependent feature that suggests the existence of a second energy gap, about four times smaller than the major gap.

RevTeX-4.0, 4 pages plus 1 page with 3 figures

References in corpus (9)

• Superconductivity of metallic boron in MgB_2
• Boron Isotope Effect in Superconducting MgB${}_2$
• Superconductivity of MgB2: Covalent Bonds Driven Metallic
• The reduced total isotope effect and its implications on the nature of superconductivity in MgB2
• Scanning Tunneling Spectroscopy in MgB2
• Tunneling spectroscopy in small grains of superconducting MgB2
• Magnetoresistivity and Complete $H_{c2}(T)$ in $Mg{B}_2$
• Energy Gap from Tunneling and Metallic Sharvin Contacts onto MgB2: Evidence for a Weakened Surface Layer
• Tunneling spectroscopy measurement of the superconductor gap parameter of MgB_2

Cited by in corpus (226)

• Superconductivity in Iron Compounds
• EPW: Electron-phonon coupling, transport and superconducting properties using maximally localized Wannier functions
• Beyond Eliashberg superconductivity in MgB2: anharmonicity, two-phonon scattering, and multiple gaps
• Enhancement of the upper critical field by nonmagnetic impurities in dirty two-gap superconductors
• First-Principles Calculation of the Superconducting Transition in MgB2 within the Anisotropic Eliashberg Formalism
• Vortices with fractional flux in two-gap superconductors and in extended Faddeev model
• Two-Band Superconductivity in MgB2
• Multiband model for tunneling in MgB2 junctions
• Specific heat of MgB${}_2$ in a one- and a two-band model from first-principles calculations
• Temperature and field dependence of the anisotropy of MgB2
• Type-1.5 Superconductors
• Hidden symmetry and knot solitons in a charged two-condensate Bose system
• Evidence for Two Superconducting Gaps in $Mg{B}_2$
• Ginzburg-Landau theory of vortices in a multi-gap superconductor
• Anisotropy of the Upper Critical Field and Critical Current in Single Crystal MgB${}_2$
• Specific heat of single crystal MgB_2: a two-band superconductor with two different anisotropies
• Carbon-substitution effect on the electronic properties of MgB${}_2$ single crystals
• Multiband model for penetration depth in MgB2
• Evidence of Strong Correlations and Coherence-Incoherence Crossover in the Iron Pnictide Superconductor KFe2As2
• Thermal conductivity of single crystalline MgB_2
• Superconducting properties of MgB2 from first principles
• Carbon doping of superconducting magnesium diboride
• A review of two-band superconductivity: materials and effects on the thermodynamic and reversible mixed-state properties
• Properties of the superconducting state in a two-band model
• Superconducting properties of well-shaped MgB2 single crystal
• Possible Multiple Gap Superconductivity with Line Nodes in Heavily Hole-Doped Superconductor KFe2As2 Studied by 75As-NQR and Specific Heat
• Far-infrared optical conductivity gap in superconducting MgB2 films
• Mixed state of a dirty two-band superconductor: application to MgB_2
• Upper critical field in dirty two-band superconductors: breakdown of the anisotropic Ginzburg-Landau theory
• Multiband superconductivity in the heavy fermion compound PrOs4Sb12
• Doping evolution of superconducting gaps and electronic densities of states in Ba(Fe1-xCox)2As2 iron pnictides
• Spin Hall Effect in Atoms
• Coexistence of isotropic s-wave and extended s-wave order parameters in FeSe as revealed by the low-temperature specific heat
• Broken time-reversal symmetry in Josephson junction involving two-band superconductors
• Rattling-Induced Superconductiviy in the Beta-Pyrochlore Oxides AOs2O6
• Observation of the Crossover from Two-Gap to Single-Gap Superconductivity through Specific Heat Measurements in Neutron Irradiated MgB2
• Specific heat evidence for two-gap superconductivity in ternary-iron silicide Lu${}_2$Fe${}_3$Si${}_5$
• Strong-coupling superconductivity in layered nickel-based LaO${}_{1-x}$F${}_x$NiAs
• Evidence for two-gap superconductivity in the non-centrosymmetric compound LaNiC${}_2$
• Superconducting Transition and Phase Diagram of Single Crystal MgB2
• Kohn Anomaly in MgB2 by Inelastic X-Ray Scattering
• Pauli-Limited Multiband Superconductivity in KFe2As2
• BCS-like Superconductivity in MgCNi3
• Thermodynamics of Two - Band Superconductors: The Case of MgB${}_2$
• Two superconducting gaps in LaFeAsO0.92F0.08 revealed by 75As nuclear quadrupole resonance
• Muon-spin-relaxation study of the magnetic penetration depth in MgB2
• The Tc amplification by quantum interference effects in diborides
• Specific Heat of the Ca-Intercalated Graphite Superconductor CaC${}_6$
• Enhancement of the irreversibility field by carbon substitution in single crystal MgB${}_2$
• Anisotropic resistivity and Hall effect in MgB2 single crystals
• Energy gap, penetration depth and surface resistance of MgB2 thin films determined by microwave resonator mesurements
• Novel Josephson effects between multi-gap and single-gap superconductors
• Thermodynamic Properties and Pressure Effect on the Superconductivity in CaAlSi and SrAlSi
• All-MgB2 Josephson tunnel junctions
• Evidence of nodal superconductivity in Na_0.35CoO2-1.3H_2O: a specific heat study
• The Role of Odd-Frequency Pairing in Multiband Superconductors
• Dependence of the superconducting transition temperature of single- and polycrystalline MgB2 on hydrostatic pressure
• Superconducting gap structure of FeSe
• Systematic study of the two band/two gap superconductivity in carbon-substituted MgB2 by point-contact spectroscopy
• Reflection of two-gap nature in penetration depth measurements of MgB${}_2$ film
• Retention of Two-Band Superconductivity in Highly Carbon-Doped MgB2
• Anomalous microwave conductivity coherence peak in c-axis MgB2 thin film
• Effect of annealing on the specific heat of Ba(Fe1-xCox)2As2
• Conditions for non-monotonic vortex interaction in two-band superconductors
• Two band/two gap superconductivity in carbon-substituted MgB2 evidenced by point-contact spectroscopy
• Physical properties of noncentrosymmetric superconductor Ru${}_7$B${}_3$
• Comparative analysis of specific heat of YNi2B2C using nodal and two-gap models
• Negative thermal expansion of MgB${}_2$ in the superconducting state and anomalous behavior of the bulk Grüneisen function
• Multiband Nature of the Room-Temperature Superconductivity in Compressed LaH${}_{10}$
• Unusual effects of anisotropy on the specific heat of ceramic and single crystal MgB2
• On interband pairing in multiorbital systems
• Single gap superconductivity in beta-Bi2Pd
• Can one extract the electron-phonon-interaction from tunneling data in case of the multigap superconductor MgB${}_2$?
• Superconductivity of magnesium diboride
• Anisotropic superconductivity and magnetism in single-crystal RbEuFe${}_4$As${}_4$
• The structure of the superconducting gap in MgB2 from point-contact spectroscopy
• Anomalous Flux Flow Resistivity in Two Gap Superconductor MgB_2
• Electron-phonon effects on the Raman spectrum in MgB${}_2$
• Ultrafast Hot Phonon Dynamics in MgB${}_2$ Driven by Anisotropic Electron-Phonon Coupling
• Two-band Effects in the Angular Dependence of Hc2 of MgB2 Single Crystals
• Point-contact spectroscopy of MgB2
• Scanning Tunneling Spectroscopy in MgB 2
• Multi-gap superconductivity and Shubnikov-de Haas oscillations in single crystals of the layered boride OsB_2
• Giant vortices, vortex rings and reentrant behavior in type-1.5 superconductors
• Surface Contribution to the Superconducting Properties of MgB2 Single Crystals
• Electronic state around vortex in a two-band superconductor
• Superconducting energy gap distribution of MgB${}_2$ investigated by point-contact spectroscopy
• Origin of superconductivity transition broadening in MgB2
• Influence of Al doping on the critical fields and gap values in magnesium diboride single crystals
• Physical Property Characterization of Bulk MgB2 Superconductor
• Effect of Selenium doping on the superconductivity of Nb${}_2$Pd(S${}_{1-x}$Se${}_x$)${}_5$
• Electronic structure of MgB${}_2$: X-ray emission and absorption studies
• Energy bandstructures of MgB2 and the related compounds
• Study of temperature dependent atomic correlations in MgB${}_2$
• Study of superconducting properties of MgB2
• Odd-frequency pairing and Kerr effect in the heavy-fermion superconductor UPt${}_3$
• Superconductive materials with MgB2-like structures from data-driven screening
• Effects of pressure on the superconducting properties of magnesium diboride
• Thermal conductivity of MgB${}_2$ in the superconducting state
• Evidence for High-frequency Phonon Mediated S-wave Superconductivity : 11B-NMR Study of Al-doped MgB2
• Enhanced $T_c$ and multiband superconductivity in the fully-gapped ReBe${}_{22}$ superconductor
• Quasiparticle Excitations outside the Vortex Cores in MgB${}_2$ Probed by Muon Spin Rotation
• Inversion of two-band superconductivity at the critical electron doping of (Mg,Al)B${}_2$
• Study on the formation of MgB2 phase
• NMR relaxation rates and Knight shifts in MgB2
• Vortex states in mesoscopic three-band superconductors
• Electron-phonon coupling and pairing mechanism in $\beta$--Bi${}_2$Pd centrosymmetric superconductor
• Interface energy of two band superconductors
• ${}^{11}$B and ${}^{27}$Al NMR spin-lattice relaxation and Knight shift study of Mg${}_{1-x}$Al${}_x$B${}_2$. Evidence for anisotropic Fermi surface
• Multiple-gap response of type-I noncentrosymmetric BeAu superconductor
• Anisotropy and internal field distribution of MgB2 in the mixed state at low temperatures
• Electron-Phonon Interaction in NbB_2 : A Comparison with MgB_2
• Angular-dependent upper critical field of overdoped Ba(Fe${}_{1-x}$Ni${}_x$)${}_2$As${}_2$
• Pair symmetry conversion in driven multiband superconductors
• Superconducting energy gap in MgB2 film observed by infrared reflectance
• Superconductivity at 9K in Mo5PB2 with evidence for multiple gaps
• Low temperature specific heat of 12442-type KCa_2Fe_4As_4F_2 single crystals
• Electronic Thermal Conductivity of Multi-Gap Superconductors with Application to MgB_2
• First-principles prediction of superconductivity in MgB${}_3$C${}_3$
• A magnetization and ${}^{11}$B NMR study of Mg${}_{1-x}$Al${}_x$B${}_2$ superconductors
• muSR study of carbon-doped MgB2 superconductors
• Weak Coupling BCS-like Superconductivity in the Pnictide Oxide Ba${}_{1-x}$Na${}_x$Ti${}_2$Sb${}_2$O (x=0 and 0.15)
• Unconventional multiband superconductivity with nodes in single-crystalline SrFe2(As_0.65P_0.35)2 as seen via 31P-NMR and specific heat
• Subharmonic gap structures and Josephson effect in MgB2/Nb micro-constrictions
• Construction of a Cantilever-Andreev-Tunneling rig and its applications to superconductors
• Anisotropic Superconducting Properties of MgB2 Single Crystals
• Supercurrent on a vortex core in 2H-NbSe${}_2$: current driven scanning tunneling spectroscopy
• Multigap Superconductivity in Chiral Noncentrosymmetric TaRh${}_2$B${}_2$
• Supercurrent induced resonant optical response
• Magneto-optical reflectivity of superconducting MgB2 single crystals
• Infrared properties of Mg${}_{1-x}$Al${}_x($B${}_{1-y}$C${}_y$)${}_2$ single crystals in the normal and superconducting state
• Hc2 of anisotropy two-band superconductors by Ginzburg-Landau approach
• Structural and Superconducting Transitions in Mg_{1-x}Al_{x}B_2
• Absence of a boron isotope effect in the magnetic penetration depth of MgB${}_2$
• Angular dependence of the bulk nucleation field Hc2 of aligned MgB2 crystallites
• Critical temperature of MgB${}_2$ ultrathin superconducting films: BCS model calculations in tight-binding approximation
• Evidence for line nodes in the energy gap of the overdoped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ from low-temperature specific heat measurements
• Possible multigap Type-I superconductivity in the layered Boride RuB${}_2$
• Ab initio calculations of H${}_{c2}$ for Nb, NbSe2, and MgB2
• Suppression of fluctuations in a two-band superconductor with a quasi-1D band
• Fluctuation Study of the Specific Heat of MgB2
• Multi-band superconductivity driven by a site-selective mechanism in Mo${}_8$Ga${}_{41}$
• Temperature and Field Dependence of the Energy Gap of MgB2/Pb planar junction
• A Magnetization and Microwave Study of Superconducting MgB2
• Superconductivity and the upper critical field in the chiral noncentrosymmetric superconductor NbRh${}_2$B${}_2$
• Theory for phonon-induced superconductivity in MgB${}_2$
• Weak inter-band coupling in Mg${}^{10}$B${}_2$: a specific heat analysis
• Thermoelectric power of MgB${}_{2-x}$Be${}_x$
• Mn and Fe Impurities in MgB_{2}
• Influence of disorder on the signature of pseudogap and multigap superconducting behavior in FeSe
• Modification of intergrain connectivity, upper critical field anisotropy, and critical current density in ion irradiated MgB2 films
• Effects of the Two- Gap Nature on the Microwave Conductivity of 39 K Polycrystalline MgB2 Films
• Effect of density of state on isotope effect exponent of two-band superconductors
• Magnetic monopoles in a charged two-condensate Bose-Einstein system
• Rotation of Triangular Vortex Lattice in the Two-Band Superconductor MgB2
• Universal Scaling Law for the Condensation Energy, U, Across a Broad Range of Superconductor Classes
• A Two-band Model for p-wave Superconductivity
• Magnetic field-induced gapless state in multiband superconductors
• Rutgers relation for the analysis of superfluid density in superconductors
• Multigap superconductivity in the Mo${}_5$PB${}_2$ boron-phosphorus compound
• Study of pressure effect on the magnetic penetration depth in MgB${}_2$
• Theory of macroscopic quantum tunneling with Josephson-Leggett collective excitations in multi-band superconducting Josephson junctions
• Superconductivity and structural distortion in BaPt${}_2$As${}_2$
• Multiple- to single-gap superconductivity crossover in Nb${}_5$Ir${}_{3-x}$Pt${}_x$O alloys
• Complicated nature of the gap in MgB2: magnetic field-dependent optical studies
• Superconductivity induced by inter-band nesting in the three-dimensional honeycomb lattice
• Field theoretic description of the abelian and non-abelian Josephson effect
• Measurement of the magnetic penetration depth of a superconducting MgB${}_2$ thin film with a large intraband diffusivity
• Bound State and Order Parameter Mixing Effect by Nonmagnetic Impurity Scattering in Two-band Superconductors
• Fluctuations in superconducting rings with two order parameters
• Nodeless superconductivity in noncentrosymmetric LaRhSn
• Knotted Solitons in a Charged Two-Condensate Bose System
• Superconducting properties and gap structure of the topological superconductor candidate Ti_(3)Sb
• Possible superlattice formation in high-temperature treated carbonaceous MgB2 at elevated pressure
• Evidence of unconventional superconductivity in the Ni-doped NbB2 system
• Magnetic Field Induced Density of States in Superconducting MgB${}_2$: Measurement of Conduction Electron Spin-Susceptibility
• Neon ion Irradiation studies on MgB2 Superconductor
• Superconductivity in a Scandium Borocarbide with a Layered Crystal Structure
• Phase formation and superconductivity of Fe-tube encapsulated and vacuum annealed MgB2
• Topological aspects of dual superconductors
• Thermal conductivity in a mixed state of a superconductor at low magnetic fields
• Heat capacity of mesoscopically disordered superconductors:implications to MgB${}_2$
• Type-II superconductivity in W5Si3-type Nb5Sn2Al
• Nonmagnetic impurity effects in MgB${}_2$
• Current-loops, phase transitions, and the Higgs mechanism in Josephson-coupled multi-component superconductors
• Specific Heat Investigation for Line Nodes in Heavily Overdoped Ba1-xKxFe2As2
• Correlations of superconducting fluctuations in a two-gap system
• Exploring Superconductivity in Ba${}_3$Ir${}_4$Ge${}_{16}$: Experimental and Theoretical Insights
• Spectroscopic signature of two superconducting gaps and their unusual field dependence in RuB${}_2$
• Effect of interband interactions of phonon and charge fluctuation on superconducting parameters of MgB2
• Two-gap superconductivity: interband interaction in the role of external field
• Fully anisotropic superconductivity with few Helmholtz Fermi-surface harmonics
• Finite Temperature Phase Diagrams of a Two-band Model of Superconductivity
• Strongly interacting $\sigma$-electrons and MgB${}_2$ superconductivity
• Magnetic properties of two-phase superconductors
• Orbital and Pauli limiting effects in heavily doped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• ${}^{11}$B NMR study of pure and lightly carbon doped MgB${}_2$ superconductors
• Superconductivity of Magnesium Diboride: Theoretical Aspects
• Second discontinuity in the specific heat of two-phase superconductors
• Carrier Transport in Magnesium Diboride: Role of Nano-inclusions
• Large and homogeneous mass enhancement in the rattling-induced superconductor KOs${}_2$O${}_6$
• The Bifurcation Theory of Magnetic Monopoles in a Charged Two-Condensate Bose-Einstein System
• Conduction electron spin-lattice relaxation time in the MgB2 superconductor
• The determination of the electron-phonon interaction from tunneling data in the two-band superconductor MgB2
• Transition Spectra for a BCS Superconductor with Multiple Gaps: Model Calculations for MgB_2
• Superconductivity in the layered cage compound Ba3Rh4Ge16
• Physical properties and electronic structure of the two-gap superconductor V${}_2$Ga${}_5$
• Thermodynamics of Third Order Phase Transition: A Solution to the Euler-Lagrange Equations
• Flux quantization for a vortex in two-gap superconductor
• Impact of Disorder on the Superconducting Properties and BCS-BEC Crossover in FeSe Single Crystals
• Vortex-lattice melting in magnesium diboride in terms of the elastic theory
• Effect of disorder on the far-infrared conductivity and on the microwave conductivity of two-band superconductors
• Probing the superconducting pairing of the La${}_4$Be${}_{33}$Pt${}_{16}$ alloy via muon-spin spectroscopy
• Quasiclassical Theory for Thermodynamic Properties of the Two-Band Superconductor MgB${}_2$ under Magnetic Fields
• Orbital-dependent two-band superconductivity in MgB2
• Superconducting energy gaps, low temperature specific heat, and quasiparticle spectra of MgB2
• Two-dimensional macroscopic quantum tunneling in multi-gap superconductor Josephson junctions
• Decoupled interband pairing in a bilayer iron-based superconductor evidenced by ultrahigh-resolution ARPES
• A model Hamiltonian for MgB2 which takes into account its unusual phononic features
• Different Electronic Charges in Two-Component Superconductor by Coherent State
• Single crystal growth and superconductivity in RbNi${}_2$Se${}_2$
• Temperature and field dependence of MgB2 energy gaps from tunneling spectra
• Gap Structure of the Overdoped Iron-Pnictide Superconductor Ba(Fe${}_{0.942}$Ni${}_{0.058}$)${}_2$As${}_2$: A Low-Temperature Specific-Heat Study
• Enhancing long-range order in disordered two-band s-wave superconductors
• Single-gap superconductivity in Mo${}_8$Ga${}_{41}$
• Ab initio study of orbital-selective superconductivity in $\gamma$-BiPd