Critical Doping for the Onset of Fermi-Surface Reconstruction by Charge-Density-Wave Order in the Cuprate Superconductor La 2 − x Sr x CuO 4

Sven Badoux , S. Afshar (1) , B. Michon (2) , A. Ouellet , S. Fortier , D. Leboeuf (3) , T. p. Croft , C. Lester , S. Hayden , H. Takagi (4) , K. Yamada , D. Graf , N. Doiron-Leyraud , Louis Taillefer (5)

1 Mines Saint-Étienne MSE - École des Mines de Saint-Étienne
2 NEEL - MagSup - Magnétisme et Supraconductivité
3 LNCMI-G - Laboratoire national des champs magnétiques intenses - Grenoble
4 Department of Advanced Materials, University of Tokyo
5 Département de Physique et RQMP

The Seebeck coefficient S of the cuprate superconductor La2−xSrxCuO4 (LSCO) was measured in magnetic fields large enough to access the normal state at low temperatures, for a range of Sr concentrations from x=0.07 to x=0.15. For x=0.11, 0.12, 0.125 and 0.13, S/T decreases upon cooling to become negative at low temperatures. The same behavior is observed in the Hall coefficient RH(T). In analogy with other hole-doped cuprates at similar hole concentrations p, the negative S and RH show that the Fermi surface of LSCO undergoes a reconstruction caused by the onset of charge-density-wave modulations. Such modulations have indeed been detected in LSCO by X-ray diffraction in precisely the same doping range. Our data show that in LSCO this Fermi-surface reconstruction is confined to 0.085

Domaines: Matière Condensée [cond-mat]; Supraconductivité [cond-mat.supr-con]; Electrons fortement corrélés [cond-mat.str-el]

Sven Badoux, S. Afshar, B. Michon, A. Ouellet, S. Fortier, et al.. Critical Doping for the Onset of Fermi-Surface Reconstruction by Charge-Density-Wave Order in the Cuprate Superconductor La 2 − x Sr x CuO 4. Physical Review X, 2016, 6 (2), pp.021004. ⟨10.1103/PhysRevX.6.021004⟩. ⟨hal-02008805⟩