Cryogenic growth at 6 K increases structural disorder in aluminum films, enhancing superconductivity with higher Tc and critical field, shifting optical color to yellow, and raising kinetic inductance while microwave loss remains TLS-dominated.
These changes in the structure can also be measured using atomic force microscopy (AFM) which shows a dramatic difference in the surface morphology of both films
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Cryogenic growth of aluminum: structural morphology, optical properties, superconductivity and microwave dielectric loss
Cryogenic growth at 6 K increases structural disorder in aluminum films, enhancing superconductivity with higher Tc and critical field, shifting optical color to yellow, and raising kinetic inductance while microwave loss remains TLS-dominated.