Materials Summary
=================


       
      

**Superconducting Materials**

 

Quick comparison table for superconducting material selection.

.. list-table::
   :header-rows: 1

   * - Material
     - Type
     - Tc
     - Primary Use
   * - Aluminum (Al)
     - Superconductor
     - 1.2 K
     - Qubit body, JJ electrodes
   * - Niobium (Nb)
     - Superconductor
     - 9.3 K
     - Resonators, wiring layers
   * - Silicon (Si)
     - Substrate
     - —
     - Qubit chip foundation
   * - Sapphire (Al₂O₃)
     - Substrate
     - —
     - High-coherence substrate
   * - Titanium Nitride (TiN)
     - Compound SC
     - 4–5.6 K
     - High-kinetic-inductance elements
   * - Niobium Nitride (NbN)
     - Compound SC
     - 16 K
     - SNSPDs, resonators
   * - NbTiN
     - Compound SC
     - 15 K
     - High-Q resonators, SQUIDs
   * - AlOx (tunnel barrier)
     - Dielectric
     - —
     - Josephson junction tunnel barrier
   * - MoRe alloy
     - Superconductor
     - 9–14 K
     - Hybrid / topological qubits
   * - Indium (In)
     - Superconductor
     - 3.4 K
     - 3D flip-chip bump bonds