Pseudogap Suppression by Competition with Superconductivity in La-Based Cuprates

Abstract

We have carried out a comprehensive high-resolution angle-resolved photoemission spectroscopy (ARPES) study of the pseudogap interplay with superconductivity in La-based cuprates. The three systems La${}_{2-x}$Sr${}_x$CuO${}_4$, La${}_{1.6-x}$Nd${}_{0.4}$Sr${}_x$CuO${}_4$, and La${}_{1.8-x}$Eu${}_{0.2}$Sr${}_x$CuO${}_4$ display slightly different pseudogap critical points in the temperature versus doping phase diagram. We have studied the pseudogap evolution into the superconducting state for doping concentrations just below the critical point. In this setting, near optimal doping for superconductivity and in the presence of the weakest possible pseudogap, we uncover how the pseudogap is partially suppressed inside the superconducting state. This conclusion is based on the direct observation of a reduced pseudogap energy scale and re-emergence of spectral weight suppressed by the pseudogap. Altogether these observations suggest that the pseudogap phenomenon in La-based cuprates is in competition with superconductivity for anti-nodal spectral weight.

References in corpus (19)

• Magnetic order in the pseudogap phase of high-$T_C$ superconductors
• Energy gaps in high-transition temperature cuprate superconductors
• From a single-band metal to a high-temperature superconductor via two thermal phase transitions
• From a single-band metal to a high-temperature superconductor via two thermal phase transitions (Supporting Material)
• Direct evidence for a competition between the pseudogap and high temperature superconductivity in the cuprates
• Phase competition in trisected superconducting dome
• Competing charge, spin, and superconducting orders in underdoped YBa2Cu3Oy
• The ground state of heavily-overdoped non-superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$
• Tuning competing orders in La2-xSrxCuO4 cuprate superconductors by the application of an external magnetic field
• Decrease of upper critical field with underdoping in cuprate superconductors
• The coherent {\it d}-wave superconducting gap in underdoped La${}_{2-x}$Sr${}_x$CuO${}_4$ as studied by angle-resolved photoemission
• Pseudogap phase of cuprate superconductors confined by Fermi surface topology
• Disorder, Metal-Insulator crossover and Phase diagram in high-Tc cuprates
• Gapless superconductivity and the Fermi arc in the cuprates
• Electronic structure near the 1/8-anomaly in La-based cuprates
• Field-induced soft-mode quantum phase transition in La${}_{1.855}$Sr${}_{0.145}$CuO${}_4$
• Superconducting coherence peak in the electronic excitations of a single layer cuprate superconductor $B{i}_{2}S{r}_{1.6}L{a}_{0.4}Cu{O}_{6+\delta }$
• Crystal Symmetry of Stripe Ordered La1.88Sr0.12CuO4
• Evidence for Fermi surface reconstruction in the static stripe phase of La${}_{1.8-x}$Eu${}_{0.2}$Sr${}_x$CuO${}_4$, $x=1/8$

Cited by in corpus (4)

• Strongly-overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$: Evidence for Josephson-coupled grains of strongly-correlated superconductor
• Spin-stripe order tied to the pseudogap phase in La1.8-xEu0.2SrxCuO4
• Retaining Landau quasiparticles in the presence of realistic charge fluctuations in cuprates
• Beyond on-site Hubbard interaction in charge dynamics of cuprate superconductors