Revealing the high-energy electronic excitations underlying the onset of high-temperature superconductivity in cuprates

Claudio Giannetti; Federico Cilento; Stefano Dal Conte; Giacomo Coslovich; Gabriele Ferrini; Hajo Molegraaf; Markus Raichle; Ruixing Liang; Hiroshi Eisaki; Martin Greven; Andrea Damascelli; Dirk Van Der Marel; Fulvio Parmigiani

doi:10.1038/ncomms1354

Revealing the high-energy electronic excitations underlying the onset of high-temperature superconductivity in cuprates

Claudio Giannetti^*, Federico Cilento, Stefano Dal Conte, Giacomo Coslovich, Gabriele Ferrini, Hajo Molegraaf, Markus Raichle, Ruixing Liang, Hiroshi Eisaki, Martin Greven, Andrea Damascelli, Dirk Van Der Marel, Fulvio Parmigiani

^*Corresponding author for this work

Inorganic Materials Science

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Abstract

In strongly correlated systems the electronic properties at the Fermi energy (E_F) are intertwined with those at high-energy scales. One of the pivotal challenges in the field of high-temperature superconductivity (HTSC) is to understand whether and how the high-energy scale physics associated with Mott-like excitations (|E-F_F|>1 eV) is involved in the condensate formation. Here, we report the interplay between the many-body high-energy CuO₂ excitations at 1.5 and 2 eV, and the onset of HTSC. This is revealed by a novel optical pump-supercontinuum-probe technique that provides access to the dynamics of the dielectric function in Bi₂Sr ₂Ca_0.92Y_0.08Cu₂O _8+δ over an extended energy range, after the photoinduced suppression of the superconducting pairing. These results unveil an unconventional mechanism at the base of HTSC both below and above the optimal hole concentration required to attain the maximum critical temperature (T _c).

Original language	English
Article number	353
Journal	Nature communications
Volume	2
Issue number	1
DOIs	https://doi.org/10.1038/ncomms1354
Publication status	Published - 2011

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Giannetti, C., Cilento, F., Dal Conte, S., Coslovich, G., Ferrini, G., Molegraaf, H., Raichle, M., Liang, R., Eisaki, H., Greven, M., Damascelli, A., Van Der Marel, D., & Parmigiani, F. (2011). Revealing the high-energy electronic excitations underlying the onset of high-temperature superconductivity in cuprates. Nature communications, 2(1), Article 353. https://doi.org/10.1038/ncomms1354

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title = "Revealing the high-energy electronic excitations underlying the onset of high-temperature superconductivity in cuprates",

abstract = "In strongly correlated systems the electronic properties at the Fermi energy (EF) are intertwined with those at high-energy scales. One of the pivotal challenges in the field of high-temperature superconductivity (HTSC) is to understand whether and how the high-energy scale physics associated with Mott-like excitations (|E-FF|>1 eV) is involved in the condensate formation. Here, we report the interplay between the many-body high-energy CuO2 excitations at 1.5 and 2 eV, and the onset of HTSC. This is revealed by a novel optical pump-supercontinuum-probe technique that provides access to the dynamics of the dielectric function in Bi2Sr 2Ca0.92Y0.08Cu2O 8+δ over an extended energy range, after the photoinduced suppression of the superconducting pairing. These results unveil an unconventional mechanism at the base of HTSC both below and above the optimal hole concentration required to attain the maximum critical temperature (T c).",

author = "Claudio Giannetti and Federico Cilento and {Dal Conte}, Stefano and Giacomo Coslovich and Gabriele Ferrini and Hajo Molegraaf and Markus Raichle and Ruixing Liang and Hiroshi Eisaki and Martin Greven and Andrea Damascelli and {Van Der Marel}, Dirk and Fulvio Parmigiani",

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Giannetti, C, Cilento, F, Dal Conte, S, Coslovich, G, Ferrini, G, Molegraaf, H, Raichle, M, Liang, R, Eisaki, H, Greven, M, Damascelli, A, Van Der Marel, D & Parmigiani, F 2011, 'Revealing the high-energy electronic excitations underlying the onset of high-temperature superconductivity in cuprates', Nature communications, vol. 2, no. 1, 353. https://doi.org/10.1038/ncomms1354

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AU - Giannetti, Claudio

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AU - Dal Conte, Stefano

AU - Coslovich, Giacomo

AU - Ferrini, Gabriele

AU - Molegraaf, Hajo

AU - Raichle, Markus

AU - Liang, Ruixing

AU - Eisaki, Hiroshi

AU - Greven, Martin

AU - Damascelli, Andrea

AU - Van Der Marel, Dirk

AU - Parmigiani, Fulvio

PY - 2011

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AB - In strongly correlated systems the electronic properties at the Fermi energy (EF) are intertwined with those at high-energy scales. One of the pivotal challenges in the field of high-temperature superconductivity (HTSC) is to understand whether and how the high-energy scale physics associated with Mott-like excitations (|E-FF|>1 eV) is involved in the condensate formation. Here, we report the interplay between the many-body high-energy CuO2 excitations at 1.5 and 2 eV, and the onset of HTSC. This is revealed by a novel optical pump-supercontinuum-probe technique that provides access to the dynamics of the dielectric function in Bi2Sr 2Ca0.92Y0.08Cu2O 8+δ over an extended energy range, after the photoinduced suppression of the superconducting pairing. These results unveil an unconventional mechanism at the base of HTSC both below and above the optimal hole concentration required to attain the maximum critical temperature (T c).

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Revealing the high-energy electronic excitations underlying the onset of high-temperature superconductivity in cuprates

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