Possible superconductivity from incoherent carriers in overdoped cuprates

Culo, M.; Duffy, C.; Ayres, J.; Berben, M.; Hsu, Yi-Ting; Hinlopen, R. D. H.; Bernáth, Bence; Hussey, Nigel

doi:10.21468/SciPostPhys.11.1.012

SciPost Physics

Possible superconductivity from incoherent carriers in overdoped cuprates

M. Culo, C. Duffy, J. Ayres, M. Berben, Y.-T. Hsu, R. D. H. Hinlopen, B. Bernath, N. E. Hussey

SciPost Phys. 11, 012 (2021) · published 14 July 2021

doi: 10.21468/SciPostPhys.11.1.012
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Abstract

The non-superconducting state of overdoped cuprates is conjectured to be a strange metal comprising two distinct charge sectors, one governed by coherent quasiparticle excitations, the other seemingly incoherent and characterized by non-quasiparticle (Planckian) dissipation. The zero-temperature superfluid density n_s(0) of overdoped cuprates exhibits an anomalous depletion with increased hole doping p, falling to zero at the edge of the superconducting dome. Over the same doping range, the effective zero-temperature Hall number n_H(0) transitions from p to 1 + p. By taking into account the presence of these two charge sectors, we demonstrate that in the overdoped cuprates Tl2Ba2CuO6+\delta and La2-xSrxCuO4, the growth in n_s(0) as p is decreased from the overdoped side may be compensated by the loss of carriers in the coherent sector. Such a correspondence is contrary to expectations from conventional BCS theory and implies that superconductivity in overdoped cuprates emerges uniquely from the sector that exhibits incoherent transport in the normal state.

TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.11.1.012
TI  - Possible superconductivity from incoherent carriers in overdoped cuprates
PY  - 2021/07/14
UR  - https://www.scipost.org/SciPostPhys.11.1.012
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 11
IS  - 1
SP  - 012
A1  - Culo, M.
AU  - Duffy, C.
AU  - Ayres, J.
AU  - Berben, M.
AU  - Hsu, Yi-Ting
AU  - Hinlopen, R. D. H.
AU  - Bernáth, Bence
AU  - Hussey, Nigel
AB  - The non-superconducting state of overdoped cuprates is conjectured to be a strange metal comprising two distinct charge sectors, one governed by coherent quasiparticle excitations, the other seemingly incoherent and characterized by non-quasiparticle (Planckian) dissipation. The zero-temperature superfluid density n_s(0) of overdoped cuprates exhibits an anomalous depletion with increased hole doping p, falling to zero at the edge of the superconducting dome. Over the same doping range, the effective zero-temperature Hall number n_H(0) transitions from p to 1 + p. By taking into account the presence of these two charge sectors, we demonstrate that in the overdoped cuprates Tl2Ba2CuO6+\delta and La2-xSrxCuO4, the growth in n_s(0) as p is decreased from the overdoped side may be compensated by the loss of carriers in the coherent sector. Such a correspondence is contrary to expectations from conventional BCS theory and implies that superconductivity in overdoped cuprates emerges uniquely from the sector that exhibits incoherent transport in the normal state.
ER  -

@Article{10.21468/SciPostPhys.11.1.012,
	title={{Possible superconductivity from incoherent carriers in overdoped cuprates}},
	author={M. Culo and C. Duffy and  J. Ayres and  M. Berben and Y.-T. Hsu and R. D. H. Hinlopen and B. Bernath and N. E. Hussey},
	journal={SciPost Phys.},
	volume={11},
	pages={012},
	year={2021},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.11.1.012},
	url={https://scipost.org/10.21468/SciPostPhys.11.1.012},
}

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Authors / Affiliations: mappings to Contributors and Organizations

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¹ ² M. Culo,
¹ C. Duffy,
¹ ³ J. Ayres,
¹ M. Berben,
¹ Yi-Ting Hsu,
³ R. D. H. Hinlopen,
¹ Bence Bernáth,
¹ ³ Nigel Hussey

Funders for the research work leading to this publication