Reduced Hall carrier density in the overdoped strange metal regime of cuprate superconductors

Carsten Putzke; Jake Ayres; Liam Malone; Nigel E Hussey; Antony Carrington; et al.

doi:10.1038/s41567-021-01197-0

Reduced Hall carrier density in the overdoped strange metal regime of cuprate superconductors

Carsten Putzke, Jake Ayres, Liam Malone, Nigel E Hussey, Antony Carrington^*, et al.

^*Corresponding author for this work

School of Physics

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Abstract

Efforts to understand the microscopic origin of superconductivity in the cuprates are dependent on knowledge of the normal state. The Hall number in the low temperature, high field limit nH(0) has a particular significance because within conventional transport theory it is simply related to the number of charge carriers, and so its evolution with doping gives crucial information about the nature of the charge transport. Here we report a study of the high field Hall coefficient of the single layer cuprates Tl2Ba2CuO6+δ (Tl2201) and (Pb/La) doped Bi2Sr2CuO6+δ (Bi2201) which shows how nH(0) evolves in the overdoped, so-called strange metal, regime of cuprates. We find that nH(0) increases smoothly from p to 1 + p, where p is the number of holes doped into the parent insulating state, over a wide range of doping. The evolution of nH correlates with the emergence of the anomalous linear-in-T term in the low-T in-plane resistivity. The results could suggest that quasiparticle decoherence extends to dopings well beyond the pseudogap regime.

Original language	English
Pages (from-to)	826-831
Number of pages	6
Journal	Nature Physics
Volume	17
Issue number	7
Early online date	11 Mar 2021
DOIs	https://doi.org/10.1038/s41567-021-01197-0
Publication status	Published - Jul 2021

Bibliographical note

Funding Information:
We thank B. Arnold and P. Rourke for their contributions to the Bi2201 measurements and J. Tallon for useful discussions. This work was supported by Engineering and Physical Sciences Research Council grants EP/R011141/1, EP/K016709/1 and EP/L015544/1, the Netherlands Organisation for Scientific Research (NWO) grant 16METL01 ‘Strange Metals’ and the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 835279-Catch-22). W.T. acknowledges support from the Polish National Agency for Academic Exchange under the ‘Polish Returns 2019’ programme, grant PPN/PPO/2019/1/00014/U/0001. We also acknowledge support from HFML-RU/FOM, HLD-HZDR and LNCMI-CNRS, members of the European Magnetic Field Laboratory (EMFL).

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© 2021, The Author(s), under exclusive licence to Springer Nature Limited.

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title = "Reduced Hall carrier density in the overdoped strange metal regime of cuprate superconductors",

abstract = "Efforts to understand the microscopic origin of superconductivity in the cuprates are dependent on knowledge of the normal state. The Hall number in the low temperature, high field limit nH(0) has a particular significance because within conventional transport theory it is simply related to the number of charge carriers, and so its evolution with doping gives crucial information about the nature of the charge transport. Here we report a study of the high field Hall coefficient of the single layer cuprates Tl2Ba2CuO6+δ (Tl2201) and (Pb/La) doped Bi2Sr2CuO6+δ (Bi2201) which shows how nH(0) evolves in the overdoped, so-called strange metal, regime of cuprates. We find that nH(0) increases smoothly from p to 1 + p, where p is the number of holes doped into the parent insulating state, over a wide range of doping. The evolution of nH correlates with the emergence of the anomalous linear-in-T term in the low-T in-plane resistivity. The results could suggest that quasiparticle decoherence extends to dopings well beyond the pseudogap regime.",

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note = "Funding Information: We thank B. Arnold and P. Rourke for their contributions to the Bi2201 measurements and J. Tallon for useful discussions. This work was supported by Engineering and Physical Sciences Research Council grants EP/R011141/1, EP/K016709/1 and EP/L015544/1, the Netherlands Organisation for Scientific Research (NWO) grant 16METL01 {\textquoteleft}Strange Metals{\textquoteright} and the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 research and innovation programme (grant agreement no. 835279-Catch-22). W.T. acknowledges support from the Polish National Agency for Academic Exchange under the {\textquoteleft}Polish Returns 2019{\textquoteright} programme, grant PPN/PPO/2019/1/00014/U/0001. We also acknowledge support from HFML-RU/FOM, HLD-HZDR and LNCMI-CNRS, members of the European Magnetic Field Laboratory (EMFL). Publisher Copyright: {\textcopyright} 2021, The Author(s), under exclusive licence to Springer Nature Limited.",

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N2 - Efforts to understand the microscopic origin of superconductivity in the cuprates are dependent on knowledge of the normal state. The Hall number in the low temperature, high field limit nH(0) has a particular significance because within conventional transport theory it is simply related to the number of charge carriers, and so its evolution with doping gives crucial information about the nature of the charge transport. Here we report a study of the high field Hall coefficient of the single layer cuprates Tl2Ba2CuO6+δ (Tl2201) and (Pb/La) doped Bi2Sr2CuO6+δ (Bi2201) which shows how nH(0) evolves in the overdoped, so-called strange metal, regime of cuprates. We find that nH(0) increases smoothly from p to 1 + p, where p is the number of holes doped into the parent insulating state, over a wide range of doping. The evolution of nH correlates with the emergence of the anomalous linear-in-T term in the low-T in-plane resistivity. The results could suggest that quasiparticle decoherence extends to dopings well beyond the pseudogap regime.

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Reduced Hall carrier density in the overdoped strange metal regime of cuprate superconductors

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