Electron Correlation in High Temperature Cuprates

Isotopic fingerprint of electron-phonon coupling in high-Tc cuprates.

Angle-resolved photoemission spectroscopy with low-energy tunable photons along the nodal direction of oxygen isotope substituted Bi(2)Sr(2)CaCu(2)O(8+delta) reveals a distinct oxygen isotope shift near the electron-boson coupling "kink" in the electronic dispersion. The magnitude (a few meV) and direction of the kink shift are as expected due to the measured isotopic shift of phonon frequency,...

Finite-temperature Simulation Based on the Lanczos Algorithm for Low-dimensional Strongly Correlated Electron Systems; High-temperature Superconducting Cuprates

The Lanczos algorithm is applied to calculate some finite-temperature physical quantities, as well as the ground-state ones. We introduce the finite-temperature Lanczos algorithm and apply it for some current problems in the low-dimensional strongly correlated electron systems; the charge stripe, the pseudogap and phonon-induced anomalous ARPES spectrum in the high-Tc superconducting cuprates.

Electron Doped Cuprates

High-temperature interface superconductivity between metallic and insulating cuprates

High-temperature superconductivity confined to nanometer-size interfaces has been a long standing goal because of potential applications 1,2 and the opportunity to study quantum phenomena in reduced dimensions 3,4. However, this is a challenging target: in conventional metals the high electron density restricts interface effects such as carrier depletion/accumulation to a region much narrower t...

Title: Overdoped cuprates with high-temperature superconducting transitions

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