Materials Summary¶
Superconducting Materials
Quick comparison table for superconducting material selection.
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 |