Transparent superconductivity in lithiated indium tin oxide thin films
Denisse Córdova Carrizales, Rain K. C. Wang, Johanna Nordlander, Grace A. Pan, Erika V. Ortega Ortiz, Larissa Little, Arthur McClelland, Ed Macomber, Austin J. Akey, Jarad A. Mason, Charles M. Brooks, Julia A. Mundy, Ari B. Turkiewicz
DOI 10.1103/PhysRevMaterials.8.124803 · Physical Review Materials
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Abstract
Indium tin oxide (Sn-doped In2O3; ITO) is a well-studied transparent conductor where doping can be used to stabilize a superconducting state. In this work, we use a combination of thin film deposition of ITO and solution-phase chemistry using n-BuLi (C4H9Li) to realize superconductivity in Li-doped ITO. Solution-phase intercalation is commonly employed for bulk, polycrystalline materials but has rarely been applied to thin films. Using x-ray diffraction, atomic force microscopy, electronic transport, and optical transmission measurements, we characterize the optical transparency and superconductivity of lithium intercalated ITO thin films. After 72 hours of lithium intercalation, we find a critical temperature, Tc, of 0.49 K and an optical transparency of at least 73% in the visible optical range—all while maintaining crystallinity and nanometer surface roughness.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| In Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.4 | Pressure not reported | unknown |
| Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.7 | Pressure not reported | unknown |
| In2O3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.3 | Pressure not reported | unknown |
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