Layered metals as polarized transparent conductors

Carsten Putzke (), Chunyu Guo, Vincent Plisson, Martin Kroner, Thibault Chervy, Matteo Simoni, Pim Wevers, Maja D. Bachmann, John R. Cooper, Antony Carrington, Naoki Kikugawa, Jennifer Fowlie, Stefano Gariglio, Andrew P. Mackenzie, Kenneth S. Burch, Ataç Îmamoğlu and Philip J. W. Moll ()
Additional contact information
Carsten Putzke: École Polytechnique Fédérale de Lausanne (EPFL)
Chunyu Guo: École Polytechnique Fédérale de Lausanne (EPFL)
Vincent Plisson: Boston College
Martin Kroner: ETH Zurich
Thibault Chervy: ETH Zurich
Matteo Simoni: ETH Zurich
Pim Wevers: ETH Zurich
Maja D. Bachmann: Max Planck Institute for Chemical Physics of Solids
John R. Cooper: University of Cambridge
Antony Carrington: University of Bristol, Tyndall Avenue
Naoki Kikugawa: National Institute for Materials Science
Jennifer Fowlie: University of Geneva
Stefano Gariglio: University of Geneva
Andrew P. Mackenzie: Max Planck Institute for Chemical Physics of Solids
Kenneth S. Burch: Boston College
Ataç Îmamoğlu: ETH Zurich
Philip J. W. Moll: École Polytechnique Fédérale de Lausanne (EPFL)

Nature Communications, 2023, vol. 14, issue 1, 1-7

Abstract: Abstract The quest to improve transparent conductors balances two key goals: increasing electrical conductivity and increasing optical transparency. To improve both simultaneously is hindered by the physical limitation that good metals with high electrical conductivity have large carrier densities that push the plasma edge into the ultra-violet range. Technological solutions reflect this trade-off, achieving the desired transparencies only by reducing the conductor thickness or carrier density at the expense of a lower conductance. Here we demonstrate that highly anisotropic crystalline conductors offer an alternative solution, avoiding this compromise by separating the directions of conduction and transmission. We demonstrate that slabs of the layered oxides Sr2RuO4 and Tl2Ba2CuO6+δ are optically transparent even at macroscopic thicknesses >2 μm for c-axis polarized light. Underlying this observation is the fabrication of out-of-plane slabs by focused ion beam milling. This work provides a glimpse into future technologies, such as highly polarized and addressable optical screens.

Date: 2023
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DOI: 10.1038/s41467-023-38848-0

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