Observation of small Fermi pockets protected by clean CuO2 sheets of a high-Tc superconductor

Abstract

The superconductivity of high transition temperature (Tc) occurs in copper oxides with carrier-doping to an antiferromagnetic (AF) Mott insulator. This discovery more than thirty years ago immediately led to a prediction about the formation of a small Fermi pocket. This structure, however, has not yet been detected, while it could be a key element in relating high-Tc superconductivity to Mott physics. To address this long-standing issue, we investigate the electronic structure of a five-layered Ba2Ca4Cu5O10(F,O)2 with inner CuO2 planes demonstrated to be cleanest ever in cuprates. Most surprisingly, we find small Fermi surface (FS) pockets closed around (pi/2,pi/2) consistently by angle-resolved photoemission spectroscopy (ARPES) and quantum oscillation measurements. The d-wave superconducting gap opens along the pocket, revealing the coexistence between the superconductivity and AF order in the same CuO2 sheet. Our data further indicate that the superconductivity can occur without contribution from the states near the antinodal region, which are shared by other competing excitations such as the charge density wave (CDW) and pseudogap states. This will have significant implications for understanding the superconductivity and puzzling Fermi arc phenomena in cuprates.

References in corpus (14)

• Direct observation of competition between superconductivity and charge density wave order in YBa2Cu3Oy
• Quantum oscillations and the Fermi surface in an underdoped high-Tc superconductor
• Electron pockets in the Fermi surface of hole-doped high-Tc superconductors
• Direct evidence for a competition between the pseudogap and high temperature superconductivity in the cuprates
• Quantum Oscillations in the Underdoped Cuprate YBa2Cu4O8
• Anomalous high energy dispersion in photoemission spectra from insulating cuprates
• Competition between d-wave superconductivity and antiferromagnetism in the 2D Hubbard model
• Asymmetry of the electronic states in hole- and electron-doped cuprates: Exact diagonalization study of the t-t'-t''-J model
• Point nodes persisting far beyond Tc in Bi2212
• Imaging nanoscale Fermi surface variations in an inhomogeneous superconductor
• High-field Hall resistivity and magnetoresistance in electron-doped Pr_2-xCe_xCuO_{4-δ}
• Nodeless superconductivity arising from strong (pi,pi) antiferromagnetism in the infinite-layer electron-doped cuprate Sr1-xLaxCuO2
• Structural origin of apparent Fermi surface pockets in angle-resolved photoemission of Bi${}_2$Sr${}_{2-x}$La${}_x$CuO${}_{6+\delta }$
• Band Structure of Overdoped Cuprate Superconductors: Density Functional Theory Matching Experiments

Cited by in corpus (35)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Fermi surface transformation at the pseudogap critical point of a cuprate superconductor
• Normal state specific heat in the cuprates La${}_{2-x}$Sr${}_x$CuO${}_4$ and Bi${}_{2+y}$Sr${}_{2-x-y}$La${}_x$CuO${}_{6+\delta }$ near the critical point of the pseudogap phase
• Small Fermi pockets intertwined with charge stripes and pair density wave order in a kagome superconductor
• Synthesis and electronic properties of Nd${}_{n+1}$Ni${}_n$O${}_{3n+1}$ Ruddlesden-Popper nickelate thin films
• Unveiling phase diagram of the lightly doped high-Tc cuprate superconductors with disorder removed
• Transport signatures of the pseudogap critical point in the cuprate superconductor Bi${}_2$Sr${}_{2-x}$La${}_x$CuO${}_{6+\delta }$
• Fermi Arcs From Dynamical Variational Monte Carlo
• Fermi and Luttinger arcs: two concepts, realized on one surface
• Spin density wave, Fermi liquid, and fractionalized phases in a theory of antiferromagnetic metals using paramagnons and bosonic spinons
• Dark states of electrons in a quantum system with two pairs of sublattices
• Field-dependent specific heat of the canonical underdoped cuprate superconductor YBa${}_2$Cu${}_4$O${}_8$
• Superconductivity in bilayer $t$-$t^{\prime }$ Hubbard models
• Theoretical insights into electronic nematic order, bond-charge orders, and plasmons in cuprate superconductors
• On the cuprates' universal waterfall feature: evidence of a momentum-driven crossover
• Hidden charge density wave induced shadow bands and ultrafast dynamics of CuTe investigated using time-resolved ARPES
• Scattering theory of mesons in doped antiferromagnetic Mott insulators: Multichannel perspective and Feshbach resonance
• Observation of the Yamaji effect in a cuprate superconductor
• Charge order near the antiferromagnetic quantum critical point in the trilayer high $T_c$ cuprate HgBa${}_2$Ca${}_2$Cu${}_3$O${}_{8+\delta }$
• Spin and bond-charge excitation spectra in correlated electron systems near antiferromagnetic phase
• Fractionalized Fermi liquids and the cuprate phase diagram
• The Future of the Correlated Electron Problem
• Pseudogap with Fermi arcs and Fermi pockets in half-filled twisted transition metal dichalcogenides
• Signatures of the Fermi surface reconstruction of a doped Mott insulator in a slab geometry
• Effects of vortex and antivortex excitations in underdoped Bi${}_2$Sr${}_2$Ca${}_2$Cu${}_3$O${}_{10+\delta }$ bulk single crystals
• Superconducting phase diagram of multi-layer square-planar nickelates
• Yamaji effect in models of underdoped cuprates
• Introduction to High-Temperature Superconductivity for Solid State Chemists
• Anomaly of longitudinal spin susceptibility at superconducting instability inside a magnetic phase
• Cuprates, Pnictides and Sulfosalts: Lessons in Functional Materials
• Interfacial Polarons Driven by Charge Transfer In WSe2/Cuprate Superconductor Systems
• Probing the pseudogap and beyond: Examining single-particle properties of the hole- and electron-doped Hubbard model
• Persistent Fermi Pockets and Robust Electron Pairing in Lightly Doped CuO${}_2$ Planes of Cuprate Superconductors
• BCS-BEC crossover driven by small Fermi pockets of a high-Tc cuprate superconductor
• Charge order in the Pr substituted YBa${}_2$Cu${}_3$O${}_7$ from high-field Hall effect measurements