Naslov
Possible superconductivity from carriers that exhibit strange metal behavior in overdoped cuprates
(Possible superconductivity from carriers that exhibit strange metal behavior in overdoped cuprates)

Autori
Čulo, Matija ; Duffy, Caitlin ; Ayres, Jake ; Berben, Maarten ; Hsu, Yu-Te ; Hinlopen, Roemer ; Bernáth, Bence ; Hussey, Nigel

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Solid State Science & Research Book of Abstracts / Biliškov, Nikola ; Brekalo, Ivana ; Martinez, Valentina - Zagreb : Institut Ruđer Bošković, 2021, 29-29

ISBN
978-953-7941-35-2

Skup
Solid-State Science & Research 2021 (SCIRES2021)

Mjesto i datum
Zagreb, Hrvatska, 10.06.2021. - 11.06.2021

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
high-temperature superconductivity ; cuprates ; strange metal ; high-field magnetoresistance ; coherent quasiparticles ; incoherent carriers ; superfluid density ; Hall carrier density ; BCS theory

Sažetak
After more than thirty years of intensive research, high-temperature superconductivity in cuprates still remains one of the biggest mysteries in condensed matter physics. Especially interesting is the overdoped part of the phase diagram where superconductivity emerges from a strange metal phase that is no less mysterious. Our recent high-field magnetoresistance study showed that this strange metal phase actually consists of two distinct charge sectors, one governed by standard coherent quasiparticles giving rise to normal metal properties such as the Hall response, and the other governed by incoherent carriers (with no intrinsic Hall response) responsible for strange metal behavior. In addition, the zero-temperature superfluid density exhibits an anomalous depletion with increasing doping while over the same doping range the effective zero-temperature Hall carrier density increases and are both smaller than the total carrier density. Here we present our detailed analysis in overdoped Tl2Ba2CuO6+δ and La2-xSrxCuO4 which showed that the growth in the superfluid density, as doping is decreased from the overdoped side, may be compensated by the loss in the coherent carrier density and that their sum is approximately equal to the total carrier density. Such a correspondence, in contrast to the conventional BCS theory, implies that superconductivity in overdoped cuprates emerges uniquely from incoherent carriers that exhibit strange metal behavior.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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