Journal ArticleDOI
The Origin of the Superstructure in Bi2Sr2CaCu2O8+δ as Revealed by Scanning Tunneling Microscopy
Mark D. Kirk,Jun Nogami,A. A. Baski,David B. Mitzi,Aharon Kapitulnik,T. H. Geballe,Calvin F. Quate +6 more
TLDR
Real-space images with atomic resolution of the BiO plane of Bi2Sr2CaCu2O8+δ were obtained with a scanning tunneling microscope, revealing the structural nature of the superlattice.Abstract:
Real-space images with atomic resolution of the BiO plane of Bi2Sr2CaCu2O8+δ were obtained with a scanning tunneling microscope. Single-crystal samples were cleaved and imaged under ultrahigh vacuum conditions at room temperature. The images clearly show the one-dimensional incommensurate superstructure along the b -axis that is common to this phase. High-resolution images show the position of the Bi atoms, revealing the structural nature of the superlattice. A missing row of Bi atoms occurs either every nine or ten atomic sites in both (110) directions, accounting for the measured incommensurate periodicity of the superstructure. A model is proposed that includes missing rows of atoms, as well as displacements of the atomic positions along both the a - and c -axis directions.read more
Citations
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Electronic structure of the high-temperature oxide superconductors
TL;DR: In this paper, a review of the results of the density-functional type of electronic structure calculations is presented, and their results are compared with the relevant experimental data, showing that the important electronic states are dominated by the copper and oxygen orbitals, with strong hybridization between them.
Journal ArticleDOI
Scanning tunneling spectroscopy of high-temperature superconductors
TL;DR: The use of tunneling microscopy and spectroscopy has played a central role in the experimental verification of the microscopic theory of superconductivity in classical superconductors as discussed by the authors.
Journal ArticleDOI
Experimental studies of structurally incommensurate crystal phases
Journal ArticleDOI
NaTiO2: a layered anode material for sodium-ion batteries
TL;DR: In this article, a layered NaTiO2 anode material for Na-ion batteries was proposed, which is prepared from only earth-abundant elements, delivers 152 mA h g−1 of reversible capacity at C/10 rate, shows excellent cyclability with capacity retention over 98% after 60 cycles.
Journal ArticleDOI
Crystal chemistry and superconductivity of the copper oxides
TL;DR: In this article, the authors highlight the important roles played by crystal chemistry in controlling the superconductive properties of the intergrowth structures of the copper oxides and show that the coordination geometry preferred by different oxidation states of Cu appears to control the oxygen ordering and the Tc variation in the YBa2Cu3O6+x system.
References
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Journal ArticleDOI
A New High-Temperature Superconductor: Bi2Sr3-x Cax Cu2O8+y.
Munirpallam A. Subramanian,C. C. Torardi,Joseph C. Calabrese,Jagannatha Gopalakrishnan,K. J. Morrissey,T. R. Askew,R.B. Flippen,U. Chowdhry,Arthur W. Sleight +8 more
TL;DR: A new superconductor that displays onset behavior near 120 K has been identified as Bi2Sr3-xCaxCu2O8+y, with x ranging from about 0.4 to 0.9, and electron microscopy studies show an incommensurate superstructure along the a axis that can be approximated by an increase of a factor of 5 over the subcell dimension.
Journal ArticleDOI
Crystal substructure and physical properties of the superconducting phase Bi4(Sr,Cr)6Cu4O16+x.
Jean-Marie Tarascon,Y. Le Page,P. Barboux,B. G. Bagley,Laura Greene,W. R. McKinnon,G. W. Hull,M. Giroud,D. M. Hwang +8 more
TL;DR: A high-T/sub c/ phase in the Bi-Sr-Ca-Cu-O system of composition with similarities to both the oxygen-defect perovskites YBa/sub 2/Cu/sub 3/O/sub 7/..sqrt../sub x/ is isolated and the Meissner effect is due to a superconducting transition.
Journal ArticleDOI
Structure and physical properties of single crystals of the 84-K superconductor Bi 2.2 Sr 2 Ca 0.8 Cu 2 O 8+δ
Steven A. Sunshine,Theo Siegrist,Lynn Schneemeyer,Donald W. Murphy,Robert J. Cava,Bertram Batlogg,R. B. van Dover,R. M. Fleming,S. H. Glarum,S. Nakahara,Reginald C. Farrow,J. J. Krajewski,S. M. Zahurak,Joseph V. Waszczak,J. H. Marshall,P. Marsh,L. W. Rupp,W. F. Peck +17 more
TL;DR: La structure a des plans [CuO 2 ] ∞ separes par des atomes de calcium, des couches doubles d'oxyde de bismuth and a un niveau incommensurable le long de b avec une periode de 4,76
Journal ArticleDOI
Electronic band structure of CaBi 2 Sr 2 Cu 2 O 8
TL;DR: La structure de bande du quadratique centre CaBi 2 Sr 2 Cu 2 O 8 est calculee dans une approche de fonctionnelle de densite locale par une methode d'orbitales muffin-tin linearisee avec une approximation de sphere atomique.
Journal ArticleDOI
Effect of bismuth on high-Tc cuprate superconductors: Electronic structure of Bi2Sr
Henry Krakauer,Warren E. Pickett +1 more
TL;DR: The electronic structure of the new Bi-based high-temperature superconductor, with T/sub c/ onsets above 110 K, is shown to be altered considerably from that of the other cuprate superconductors by the presence of Bi.