Break-junction technique in application to layered superconductors (Review article)

Abstract

Here presented a systematic study of superconductor-constriction-superconductor contacts realized by a break-junction technique in layered superconductors. Depending on the constriction transparency the tunneling and SnS-Andreev spectroscopies could be used, for the direct determination of values of superconducting gaps, characteristic BCS-ratios and gap temperature dependences in cuprate superconductors, magnesium diboride, novel pnictides and chalcogenides. Basing on these data, one can estimate the gap anisotropy magnitude as well as values of electron-boson coupling constants. We discuss the advantages and difficulties of the break-junction technique and demonstrate this method is powerful enough for high-resolution investigation of optical phonon modes in high-temperature superconducting cuprates and for creating of the contacts with the selective transparence in Mg${}_{1-x}$Al${}_x$B${}_2$ compounds.

arXiv comment55 pages, 17 figures

References in corpus (46)

• Gap symmetry and structure of Fe-based superconductors
• Beyond Eliashberg superconductivity in MgB2: anharmonicity, two-phonon scattering, and multiple gaps
• Boron Isotope Effect in Superconducting MgB${}_2$
• Hamiltonian approach to the transport properties of superconducting quantum point contacts
• AC JOSEPHSON EFFECT IN A SINGLE QUANTUM CHANNEL
• 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
• The reduced total isotope effect and its implications on the nature of superconductivity in MgB2
• The Unexpected Properties of Alkali Metal Iron Selenide Superconductors
• Multiband model for tunneling in MgB2 junctions
• Probing multiband superconductivity by point-contact spectroscopy
• Band filling and interband scattering effects in MgB${}_2$: C vs Al doping
• Superconducting properties of MgB2 from first principles
• Anisotropic superconducting properties of MgB2 single crystals probed by in-plane electrical transport measurements
• Structure of Neutron-Scattering Peak in both s++ wave and s+- wave states of an Iron pnictide Superconductor
• Hole Superconductivity in $Mg{B}_2$: a high $T_c$ cuprate without Cu
• Al substitution in MgB2 crystals: influence on superconducting and structural properties
• High-pressure flux growth, structural, and superconducting properties of LnFeAsO (Ln = Pr, Nd, Sm) single crystals
• Two-band Eliashberg equations and the experimental Tc of the diboride Mg1-xAlxB2
• A New ZrCuSiAs-Type Superconductor: ThFeAsN
• Experimental evidence of two-band behavior of MgB2
• Josephson effect in MgB_2 break junctions
• Superconductivity from repulsion in LiFeAs: novel s-wave symmetry and potential time-reversal symmetry breaking
• High Temperature Superconductivity in Transition Metal Oxypnictides: a Rare-Earth Puzzle?
• Th substituted SmFeAsO: structural details and superconductivity with Tc above 50 K
• Nodal gap structure in Fe-based superconductors due to the competition between orbital and spin fluctuations
• Break-Junction Tunneling on MgB_2
• Anion height dependence of Tc and density of states in iron based superconductors
• Synthesis and physical properties of $\mathbf{La}{\mathbf{O}}_{1-\mathbf{x}}{\mathbf{F}}_{\mathbf{x}}\mathbf{FeAs}$
• Lower critical field and SNS-Andreev spectroscopy of 122-arsenides: Evidence of nodeless superconducting gap
• Magnetic and Superconducting Properties of FeAs-based High-Tc Superconductors with Gd
• Advances in point-contact spectroscopy: two-band superconductor MgB2 (A review)
• Experimental study of intrinsic multiple Andreev reflections effect in GdO(F)FeAs superconductor array junctions
• Phonon structure in I-V characteristic of MgB${}_2$ point-contacts
• Multiple Andreev reflections spectroscopy of two-gap 1111- and 11 Fe-based superconductors
• Observation of Multi-Gap Superconductivity in GdO(F)FeAs by Andreev Spectroscopy
• ThFeAsN in Relation to Other Iron-Based Superconductors
• Temperature Dependence of Superconducting Gaps in Mg(Al)B2 System Investigated by SnS-Andreev Spectroscopy
• Subharmonic gap structure in d-wave superconductors
• Temperature and Field Dependence of the Energy Gap of MgB2/Pb planar junction
• Transfer-matrix approach to multiband Josephson junctions
• Investigation of LiFeAs by means of "Break-junction" Technique
• Multigap Superconductivity in GdFeAsO${}_{0.88}$ Evidenced by SnS-Andreev Spectroscopy
• Estimation of intraband and interband relative coupling constants from temperature dependences of the order parameter for two-gap superconductors
• THz phonon spectroscopy of doped superconducting cuprates
• Intrinsic Multiple Andreev Reflections in layered Th-doped Sm${}_{1-x}$Th${}_x$OFeAs

Cited by in corpus (9)

• Amplitudes of minima in dynamic conductance spectra of the SNS Andreev contact
• On the Structure of Superconducting Order Parameter in High-Temperature Fe-Based Superconductors
• High-pressure effects on isotropic superconductivity in the iron-free layered pnictide superconductor BaPd2As2
• Superconducting Order Parameter and Bosonic Mode in Hydrogen-Substituted NdFeAsO${}_{0.6}$H${}_{0.36}$ Revealed by Multiple Andreev Reflection Spectroscopy
• Superconducting gap symmetry in BaFe${}_{1.9}$Ni${}_{0.1}$As${}_2$ superconductor
• Superconducting Order Parameters in overdoped BaFe${}_{1.86}$Ni${}_{0.14}$As${}_2$ Revealed by Multiple Andreev Reflection Spectroscopy of Planar Break-Junctions
• Evidence of a multiple boson emission in Sm${}_{1-x}$Th${}_x$OFeAs
• Direct Evidence of Two Superconducting Gaps in FeSe${}_{0.5}$Te${}_{0.5}$: SnS-Andreev Spectroscopy and Lower Critical Field
• Direct observation of the spin exciton in Andreev spectroscopy of iron-based superconductors