Specific heat of the 38-K superconductor MgB_2 in the normal and superconducting state: bulk evidence for a double gap

Preprint English OPEN
Junod, Alain; Wang, Yuxing; Bouquet, Frederic; Toulemonde, Pierre;
  • Subject: Condensed Matter - Superconductivity
    arxiv: Condensed Matter::Superconductivity

The specific heat of two polycrystalline samples of MgB_2 is presented and analyzed (2 - 300 K, 0 - 16 T), together with magnetic properties. The main characteristics are a low density of states at the Fermi level, high phonon frequencies, and an anomalous temperature- ... View more
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