450 research outputs found
Energy Gap from Tunneling and Metallic Sharvin Contacts onto MgB2: Evidence for a Weakened Surface Layer
Full text linkPoint-contact tunnel junctions using a Au tip on sintered MgB2 pellets reveal
a sharp superconducting energy gap that is confirmed by subsequent metallic
Sharvin contacts made on the same sample. The peak in the tunneling conductance
and the Sharvin contact conductance follow the BCS form, but the gap values of
4.3 meV are less than the weak-coupling BCS value of 5.9 meV for the bulk Tc of
39 K. The low value of Delta compared to the BCS value for the bulk Tc is
possibly due to chemical reactions at the surface.Comment: 3 pages, 3 figure
Progress toward the Synthesis of the Basiliolides and Transtaganolides: An Intramolecular Pyrone Diels-Alder Entry into a Novel Class of Natural Products
Full text linkWhether to Hire Local Contract Teachers? Trade-Off between Skills and Preferences in India
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Kinetic Resolution of Chiral a-Olefins Using Optically Active ansa-Zirconocene Polymerization Catalysts
Full text linkMetallocene-Terminated Allylium Salts: The Effect of End Group on Localization in Polymethines
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Preliminary study on the application of humic acid chemistry & chemical engineering materials in biological bacteria preparation
No full textInhaled Furosemide Inhibits Cough Induced by Low Chloride Content Solutions but Not by Capsaicin
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