Engineering Correlated Transparent Conductors via Metal-Insulator Transition Proximity
Abstract
Transparent conductors are key functional materials in modern optoelectronic devices. Their performance is governed by an inherent trade-off between optical transparency and electrical conductivity. Correlated metallic oxides offer an attractive workaround to this compromise, where narrow partially-filled bands provide high conductivity, while the absence of visible-range transitions enables optical transparency. Despite this promise, transparency and conductivity remain coupled through carrier density and electronic coherence. Here, we use proximity to a metal-insulator transition (MIT) as a design principle for engineering this balance in correlated-oxide transparent conductors. Epitaxial Ti-substituted SrVO3 films serve as a model platform where the optical window and metallicity are tuned simultaneously. We demonstrate and explain a systematic broadening of the optical window to regimes relevant for silicon photovoltaics. This gain is counterbalanced by carrier depletion and disorder, which drive the loss of coherent transport near the composition-driven MIT. A Haacke figure-of-merit analysis identifies the optimal composition range near the MIT, where the loss of metallic transport is accompanied by persistent near-Fermi-level spectral weight, indicating disorder-assisted localization together with correlation-driven spectral-weight redistribution. These findings establish proximity to an MIT as a general materials-design strategy, using electronic filling as a tuning knob for the transparency-conductivity balance in correlated-oxide transparent conductors.
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BibTeX
@misc{cohen2026engineering,
title = {{Engineering Correlated Transparent Conductors via Metal-Insulator Transition Proximity}},
author = {Amit Cohen and Nofar Tuval and Maria Baskin and Tien-Lin Lee and Tom Tiwald and Scott A. Chambers and Sophie D. Beck and Lior Kornblum},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.19112},
eprint = {2610.19112},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.19112},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Engineering Correlated Transparent Conductors via Metal-Insulator Transition Proximity
AU - Amit Cohen
AU - Nofar Tuval
AU - Maria Baskin
AU - Tien-Lin Lee
AU - Tom Tiwald
AU - Scott A. Chambers
AU - Sophie D. Beck
AU - Lior Kornblum
PY - 2026
DA - 2026/10/13
PB - arXiv
DO - 10.48550/arxiv.2610.19112
UR - https://arxiv.org/abs/2610.19112
AB - Transparent conductors are key functional materials in modern optoelectronic devices. Their performance is governed by an inherent trade-off between optical transparency and electrical conductivity. Correlated metallic oxides offer an attractive workaround to this compromise, where narrow partially-filled bands provide high conductivity, while the absence of visible-range transitions enables optical transparency. Despite this promise, transparency and conductivity remain coupled through carrier density and electronic coherence. Here, we use proximity to a metal-insulator transition (MIT) as a design principle for engineering this balance in correlated-oxide transparent conductors. Epitaxial Ti-substituted SrVO_3 films serve as a model platform where the optical window and metallicity are tuned simultaneously. We demonstrate and explain a systematic broadening of the optical window to regimes relevant for silicon photovoltaics. This gain is counterbalanced by carrier depletion and disorder, which drive the loss of coherent transport near the composition-driven MIT. A Haacke figure-of-merit analysis identifies the optimal composition range near the MIT, where the loss of metallic transport is accompanied by persistent near-Fermi-level spectral weight, indicating disorder-assisted localization together with correlation-driven spectral-weight redistribution. These findings establish proximity to an MIT as a general materials-design strategy, using electronic filling as a tuning knob for the transparency-conductivity balance in correlated-oxide transparent conductors.
ER -