Thermopower across the phase diagram of the cuprate La${}_{1.6-x}$Nd${}_{0.4}$Sr${}_x$CuO${}_4$ : signatures of the pseudogap and charge-density-wave phases

Abstract

The Seebeck coefficient (thermopower) $S$ of the cuprate superconductor La${}_{1.6-x}$Nd${}_{0.4}$Sr${}_x$CuO${}_4$ was measured across its doping phase diagram (from $p=0.12$ to $p=0.25$), at various temperatures down to $T\simeq 2$ K, in the normal state accessed by suppressing superconductivity with a magnetic field up to $H=37.5$ T. The magnitude of $S/T$ in the $T=0$ limit is found to suddenly increase, by a factor $\simeq 5$, when the doping is reduced below $p^{\star }=0.23$, the critical doping for the onset of the pseudogap phase. This confirms that the pseudogap phase causes a large reduction of the carrier density $n$, consistent with a drop from $n=1+p$ above $p^{\star }$ to $n=p$ below $p^{\star }$, as previously inferred from measurements of the Hall coefficient, resistivity and thermal conductivity. When the doping is reduced below $p=0.19$, a qualitative change is observed whereby $S/T$ decreases as $T\to 0$, eventually to reach negative values at $T=0$. In prior work on other cuprates, negative values of $S/T$ at $T\to 0$ were shown to result from a reconstruction of the Fermi surface caused by charge-density-wave (CDW) order. We therefore identify $p_{\mathrm{CDW}}\simeq 0.19$ as the critical doping beyond which there is no CDW-induced Fermi surface reconstruction. The fact that $p_{\mathrm{CDW}}$ is well separated from $p^{\star }$ reveals that there is a doping range below $p^{\star }$ where the transport signatures of the pseudogap phase are unaffected by CDW correlations, as previously found in YBa${}_2$Cu${}_3$O${}_y$ and La${}_{2-x}$Sr${}_x$CuO${}_4$.

arXiv commentPresent version includes a comparison with new x-ray data on Nd-LSCO by Gupta et al., arXiv:2012.08450. 13 pages, 12 figures, includes SM file

References in corpus (36)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Quantum oscillations and the Fermi surface in an underdoped high-Tc superconductor
• Electron pockets in the Fermi surface of hole-doped high-Tc superconductors
• Change of carrier density at the pseudogap critical point of a cuprate superconductor
• Two-Dimensional Superconducting Fluctuations in Stripe-Ordered La(1.875)Ba(0.125)CuO(4)
• The remarkable underlying ground states of cuprate superconductors
• Resonant X-ray Scattering Study of Charge Density Wave Correlations in YBa${}_2$Cu${}_3$O${}_{6+x}$
• Universal $T$-linear resistivity and Planckian limit in overdoped cuprates
• On the thermoelectricity of correlated electrons in the zero-temperature limit
• Linear-T resistivity and change in Fermi surface at the pseudogap critical point of a high-Tc superconductor
• Thermodynamic signatures of quantum criticality in cuprates
• Fermi-surface reconstruction by stripe order in cuprate superconductors
• Universal quantum oscillations in the underdoped cuprate superconductors
• Nernst and Seebeck Coefficients of the Cuprate SuperconductorYBa${}_2$Cu${}_3$O${}_{6.67}$: A Study of Fermi Surface Reconstruction
• Pseudogap temperature $T^{\star }$ of cuprate superconductors from the Nernst effect
• Phase diagram of charge order in La1.8-xEu0.2SrxCuO4 from resonant soft x-ray diffraction
• Fermi-surface transformation across the pseudogap critical point of the cuprate superconductor La${}_{1.6-x}$Nd${}_{0.4}$Sr${}_x$CuO${}_4$
• Hidden magnetism at the pseudogap critical point of a high temperature superconductor
• Pseudogap phase of cuprate superconductors confined by Fermi surface topology
• Theory of Quasi-Universal Ratio of Seebeck Coefficient to Specific Heat in Zero-Temperature Limit in Correlated Metals
• Fermi surface reconstruction in high-Tc superconductors
• Hall, Seebeck, and Nernst Coefficients of Underdoped HgBa2CuO4+d: Fermi-Surface Reconstruction in an Archetypal Cuprate Superconductor
• Electron scattering, charge order, and pseudogap physics in La${}_{1.6-x}$Nd${}_{0.4}$Sr${}_x$CuO${}_4$: An angle resolved photoemission spectroscopy study
• Thermoelectric Behaviour Near Magnetic Quantum Critical Point
• Hall effect and Fermi surface reconstruction via electron pockets in the high-$T_c$ cuprates
• Thermopower across the pseudogap critical point of La(1.6-x)Nd(0.4)Sr(x)CuO(4): Evidence for a quantum critical point in a hole-doped high-Tc superconductor
• Charge stripes seen with x-rays in La_(1.45)Nd_(0.4)Sr_(0.15)CuO_(4)
• Unusual interplay between superconductivity and field-induced charge order in YBa2Cu3Oy
• Critical Doping for the Onset of Fermi-Surface Reconstruction by Charge-Density-Wave Order in the Cuprate Superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$
• Phenomenological theories of the low-temperature pseudogap: Hall number, specific heat and Seebeck coefficient
• The Hall number across a van Hove singularity
• Materials preparation, single crystal growth, and the phase diagram of the cuprate high temperature superconductor La1.6-xNd0.4SrxCuO4
• Wiedemann-Franz law and abrupt change in conductivity across the pseudogap critical point of a cuprate superconductor
• Zooming on the Quantum Critical Point in Nd-LSCO
• Simultaneous drop in mean free path and carrier density at the pseudogap onset in high-$T_c$ cuprates
• Reduced Hall carrier density in the overdoped strange metal regime of cuprate superconductors

Cited by in corpus (23)

• Planckian Dissipation in Metals
• Fermi surface transformation at the pseudogap critical point of a cuprate superconductor
• Colloquium: Hydrodynamics and holography of charge density wave phases
• Seebeck coefficient in a cuprate superconductor: particle-hole asymmetry in the strange metal phase and Fermi surface transformation in the pseudogap phase
• Vanishing nematic order beyond the pseudogap phase in overdoped cuprate superconductors
• Skewed Non-Fermi Liquids and the Seebeck Effect
• Electrons with Planckian scattering obey standard orbital motion in a magnetic field
• Transport signatures of the pseudogap critical point in the cuprate superconductor Bi${}_2$Sr${}_{2-x}$La${}_x$CuO${}_{6+\delta }$
• Fate of charge order in overdoped La-based cuprates
• T-linear resistivity, optical conductivity and Planckian transport for a holographic local quantum critical metal in a periodic potential
• Information-theoretic measures of superconductivity in a two-dimensional doped Mott insulator
• The foot, the fan, and the cuprate phase diagram: Fermi-volume-changing quantum phase transitions
• Enhanced Seebeck coefficient through the magnetic fluctuations in Sr${}_2$Ru${}_{1-x}{M}_x$O${}_4$ ($M=$ Co, Mn)
• Solvable Theory of a Strange Metal at the Breakdown of a Heavy Fermi Liquid
• Positive Seebeck coefficient in highly doped La${}_{2-x}$Sr${}_x$CuO${}_4$ ($x$=0.33); its origin and implication
• Thermoelectricity and electronic correlations enhancement in FeS by slight Se substitution
• Enhanced Superconductivity and Electron Correlations in Intercalated ZrTe${}_3$
• Thermoelectric transport properties of gapless pinned charge density waves
• Effect of pressure on the pseudogap and charge-density-wave phases of the cuprate La${}_{1.6-x}$Nd${}_{0.4}$Sr${}_x$CuO${}_4$ probed by thermopower measurements
• Fractionalized Fermi liquids and the cuprate phase diagram
• Spin-stripe order tied to the pseudogap phase in La1.8-xEu0.2SrxCuO4
• Thermopower across Fermi-volume-changing quantum phase transitions without translational symmetry breaking
• Exceptional van Hove Singularities in Pseudogapped Metals