Metal-insulator transitions are accompanied by huge resistivity changes, even over tens of
orders of magnitude, and are widely observed in condensed-matter systems. This article …

Theoretical ideas and experimental results concerning high-temperature superconductors
are reviewed. Special emphasis is given to calculations performed with the help of …

We study the possibility of superconductivity in a trilayer Ruddlesden-Popper nickelate La 4
Ni 3 O 10 under pressure both theoretically and experimentally, making comparison with the …

We review the progress in the theory of one-dimensional (ID) Fermi liquids which has
occurred over the past decade. The usual Fermi liquid theory, based on a quasi-particle …

To make the transition from the quasi-long-range order in a chain of antiferromagnetically
coupled S= 1/2 spins to the true long-range order that occurs in a plane, one can assemble …

The recent discovery of the Mott insulating and superconducting phases in twisted bilayer
graphene has generated tremendous research interest. Here, we develop a weak coupling …

Electron-lattice interactions play a prominent role in quantum materials, making a deeper
understanding of direct routes to phonon-mediated high-transition-temperature (T c) …

Using the density matrix renormalization group and a bosonization approach, we study a
spin-1/2 antiferromagnetic Heisenberg chain with near-neighbor coupling J 1 and frustrating …

We have observed superconductivity in the ladder material Sr 0.4 Ca 13.6 Cu 24 O 41.84
under pressures of 3 GPa and 4.5 GPa by means of electrical measurements. The …

Abstract Magnetic properties of Sr Cu 2 O 3 and Sr 2 Cu 3 O 5, containing two-leg and three-
leg S= 1 2 ladders made of antiferromagnetic Cu-O-Cu linear bonds, were investigated. The …