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TT: Fachverband Tiefe Temperaturen
TT 9: Poster Session: Correlated Electrons
TT 9.10: Poster
Tuesday, September 28, 2021, 13:30–16:00, P
Possible superconductivity from incoherent carriers in overdoped cuprates — •Caitlin Duffy1, Matija Čulo1,2, Jake Ayres1,3, Maarten Berben1, Yu-Te Hsu1, Roemer Hinlopen3, Bence Bernáth1, and Nigel Hussey1,3 — 1High Field Magnet Laboratory (HFML-EMFL), Netherlands — 2Institut za fiziku, Zagreb, Croatia — 3University of Bristol, United Kingdom
The non-superconducting normal state of the overdoped, hole-hoped cuprates is formed of two distinct charge sectors: one coherent with quasiparticle excitations, the other incoherent and governed by non-quasiparticle Planckian dissipation (1). From p* = 0.19 to the end of the superconducting dome, a decrease in the superfluid carrier density ns(0) concurrent with an increase in the Hall (coherent) carrier density nH(0) from p to 1 + p is found; this striking anti-correlation contradicts the expectations of conventional BCS theory (2, 3). Here, we demonstrate that in two families of cuprates - La2−xSrxCuO4 and Tl2Ba2CuO6+δ - the loss of carriers in the coherent sector is entirely compensated for by the growth in ns(0) with decreasing p. This implies that superconductivity in the overdoped cuprates stems from the sector that displays incoherent transport properties (4).
[1] J. Ayres et al., Nature, (in press)
[2] I. Božović et al., Nature 536, 309*311 (2016)
[3] C. Putzke et al., Nat. Phys. 17, 826 (2021)
[4] M. Čulo, C. Duffy et al., SciPost Phys. 11, 012 (2021)