Regensburg 2010 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 25: FS: Iron-Based Superconductors

TT 25.1: Hauptvortrag

Mittwoch, 24. März 2010, 14:00–14:30, H20

Fermiology of Fe-Pnictide Superconductors Revealed by Quantum Oscillations — •James Analytis — Stanford Linear Accelerator Center

The iron-pnictide superconductors are a new class of materials with unique superconducting and magnetic properties. Many theoretical frameworks describing these materials rely heavily on the nature of the size and topology of the Fermi surface. The classic method of determining the Fermi surface is by looking at oscillations in the magnetization as a function of field. These oscillations, known as the de Haas-van Alphen effect, are extremely powerful in determining the full three-dimensional topology of the FS, in addition to the quasiparticle renormalization to the effective mass. In the present study we measure the Fermi surface of the superconducting P-doped BaFe2As2 using this technique and describe the consequences for theories of pnictide superconductivity.