Energy gaps in high-transition-temperature cuprate superconductors

  title={Energy gaps in high-transition-temperature cuprate superconductors},
  author={Makoto Hashimoto and Inna M. Vishik and Ruihua He and Thomas P. Devereaux and Zhi-Xun Shen},
  journal={Nature Physics},
The superconducting energy gap is perhaps the best-known of the spectral gaps in a superconductor, but there are many other types, including density waves and the mysterious pseudogap. This Review Article surveys what angle-resolved photoemission spectroscopy has revealed about the various gaps. 

Anisotropic evolution of energy gap in Bi2212 superconductor

We present a systematic analysis of the energy gap in underdoped Bi2212 superconductor as a function of temperature and hole doping level. Within the framework of the theoretical model containing the

Nanocalorimetry of electronic phase transitions in systems with unconventional superconductivity and magnetic ordering

In this thesis, low temperature specific heat measurements on small (μg) single crystals of different superconducting and magnetic systems are presented. The device used in this work features a com

Role of a fermion condensate in the structure of high-temperature pairing in cuprates

The anomalous properties of a pairing gap in cuprate superconductors have been explained under the assumption that their electron systems in the normal phase exhibit a fermion condensate, i.e., a set

Photoemission perspective on pseudogap, superconducting fluctuations, and charge order in cuprates: a review of recent progress

  • I. Vishik
  • Physics
    Reports on progress in physics. Physical Society
  • 2018
Recent progress is reviewed in understanding the relationship between superconductivity and the pseudogap, the Fermi arc phenomena, and the relationships between charge order and Pseudogap from the perspective of ARPES measurements.

Break-junction tunneling spectra of Bi2212 superconducting ceramics: Influence of inhomogeneous d-wave-Cooper-pairing and charge-density-wave order parameters

Conductance-voltage characteristics (CVCs) of tunnel break junctions made of Bi2Sr2CaCu2O8+δ crystals were measured. It was demonstrated that the CVCs have a V-shaped inner gap region, similar to t...

Numerical Studies of Iron Based Superconductors using Spin-Fermion Models

The iron pnictide and iron chalchogenide superconductors are studied numerically using classical Monte Carlo techniques to reproduce experimental data and make predictions about the nature of the

From quantum matter to high-temperature superconductivity in copper oxides

The discovery of high-temperature superconductivity in the copper oxides in 1986 triggered a huge amount of innovative scientific inquiry but unresolved issues include the astonishing complexity of the phase diagram, the unprecedented prominence of various forms of collective fluctuations, and the simplicity and insensitivity to material details of the ‘normal’ state at elevated temperatures.

Spectroscopic evidence of low-energy gaps persisting up to 120 K in surface-doped p -terphenyl crystals

The possibility of high temperature superconductivity in organic compounds has been discussed since the pioneering work of Little in 1964, with unsatisfactory progress until the recent report of a

The Gap and the Upper Critical Field as Function of Doping for High- Cuprates

The relation between the -wave superconducting gap and the specific heat obtained with the Volovik effect is used to determine the upper critical field as doping function, for high-temperature



Evidence for pairing above the transition temperature of cuprate superconductors from the electronic dispersion in the pseudogap phase.

It is argued that the energy-momentum relation of electronic excitations near EF behaves like the dispersion of a normal metal on the Fermi arcs, but like that of a superconductor in the gapped regions.

Temporal correlations of superconductivity above the transition temperature in La 2−x Sr x CuO 4 probed by terahertz spectroscopy

Above the superconducting temperature for a given material, correlations between pairs of electrons are already present. Many experiments indicate that such correlations may exist up to 100 K above

Direct observation of competition between superconductivity and charge density wave order in YBa2Cu3O6.67

X-ray diffraction experiments reveal that spatial charge ordering occurs in the pseudogap state of YBa2Cu3O6.67. Moreover, this charge ordered state competes with high-temperature superconductivity,

Coexistence of competing orders with two energy gaps in real and momentum space in the high temperature superconductor Bi2Sr2-xLaxCuO6+δ

Through a combined scanning tunneling microscopy and angle-resolved photoemission spectroscopy study, we report the observation of two distinct gaps (a small and a large gap) that coexist both in

Observation of a d -wave nodal liquid in highly underdoped Bi 2 Sr 2 CaCu 2 O 8+ δ

High-temperature superconductivity in the cuprates arises when charge carriers are added to an insulator. Between these states lies the so-called nodal liquid at low temperature. Photoemission

Disentangling Cooper-pair formation above the transition temperature from the pseudogap state in the cuprates

The pseudogap state in the cuprate superconductors shows signs of electronic pair formation above the superconducting temperature. Is it just a ‘precursor’ state or a separate (and competing) state?

Particle-Hole Symmetry Breaking in the Pseudogap State of Bi2201

Photoemission studies in the pseudogap state of a cuprate superconductor show differences depending on whether a particle is added or removed, revealing broken translational symmetry. Moreover, this

The Ground State of the Pseudogap in Cuprate Superconductors

The nonsuperconducting, striped state at x = ⅛ is consistent with a phase-incoherent d-wave superconductor whose Cooper pairs form spin-charge–ordered structures instead of becoming superconducting.

Excitation Gap in the Normal State of Underdoped Bi2Sr2CaCu2O8+δ

Angle-resolved photoemission experiments reveal evidence of an energy gap in the normal state excitation spectrum of the cuprate superconductor Bi2Sr2CaCu2O8+δ and the momentum dependence and magnitude closely resemble those of the dx2−y2 gap observed in the superconducting state.

Competition of Superconductivity and Charge Density Waves in Cuprates: Recent Evidence and Interpretation

Explicit and implicit experimental evidence for charge density wave (CDW) presence in high- superconducting oxides is analyzed. The theory of CDW superconductors is presented. It is shown that the