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Magnetic Excitations of a Half-Filled Tl-based Cuprate
I. Bia{\l}o, Q. Wang, J. K\"uspert, X. Hong, L. Martinelli, O. Gerguri, Y. Chan, K. von Arx, O. K. Forslund, W. R. Pude{\l}ko, C. Lin, N. C. Plumb, Y. Sassa, D. Betto, N. B. Brookes, M. Rosmus, N. Olszowska, M. D. Watson, T. K. Kim, C. Cacho, M. Horio, M. Ishikado, H. M. R{\o}nnow, J. Chang
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Magnetic Excitations of a Half-Filled Tl-based Cuprate
Strong electron correlations drive Mott insulator transitions. Yet, there exists no framework to classify Mott insulators by their degree of correlation. Cuprate superconductors, with their tunable doping and rich phase diagrams, offer a unique platform to investigate the evolution of those interactions. However, spectroscopic access to a clean half-filled Mott-insulating state is lacking in compounds with the highest superconducting onset temperature. To fill this gap, we introduce a pristine,…