We review our current understanding of the mechanical, electronic and structural properties
of the element uranium, with the focus on the low-temperature regime in which the α-phase …

Recently, the light–matter interaction of perovskite microcavities has been widely explored
for its great potential in low-threshold lasing devices. However, the mechanism of perovskite …

We present exact diagonalization results of an electron-phonon model Hamiltonian for the O
(4)-Cu (1)-O (4) cluster in YBa 2 Cu 3 O 7. For large enough electron–infrared-phonon …

Abstract Analysis of polarized copper K-edge extended x-ray-absorption fine-structure
(EXAFS) measurements on YBa 2 Cu 3 O 7 for temperatures 10≤ T nom≤ 105 K indicates …

We derive an effective single-band Hubbard-type Hamiltonian for CuO 2 planes in the
cuprate high-T c superconductors. The Hamiltonian includes both electron-electron …

1. Introduction. 2. Hamiltonian and canonical two-band model. 3. Superconducting ground-
state stability. 4. Free energy of the two-band model. 5. The superconducting transition …

Recent experimental observations of unconventional isotope effects, multiband
superconductivity, and unusual local lattice responses are reviewed and shown to be …

Anharmonic interactions of the apex O vibrations in YBa 2 Cu 3 O 6.9, TlBa 2 CaCu 2 O 7,
and Tl 2 Ba 2 CaCu 2 O 8 single crystals are investigated by Raman spectroscopy. The …

The recent report of superconductivity under high pressure at the record transition
temperature of Tc= 203 K in pressurized H2S has been identified as conventional in view of …

A two-dimensional anharmonic electron-lattice interaction model with higher-order density-
density-multiphonon interactions is solved exactly for arbitrary reciprocal-lattice vector q in …