Molecular-Beam Epitaxially Grown MgB₂ Thin Films and Superconducting Tunnel Junctions

Figure 2

(From [8]) Calculated Fermi surface of MgB₂, composed of four distinctive sheets. The 𝜎 sheets from the 𝑥, 𝑦 orbitals of B are shown in red/orange (gap value ~7.1 meV), whereas the 𝜋 sheets from the 𝑧 orbitals of B are shown in blue/gree (gap value ~2.2 meV). ^©Nature publishing group.