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 …

This article reviews the physics of high-temperature superconductors from the point of view
of the do** of a Mott insulator. The basic electronic structure of cuprates is reviewed …

THE interest in carbon nanotubes has been greatly stimulated by theoretical predictions that
their electronic properties are strongly modulated by small structural variations1–8. In …

We present an experimental review of the nature of the pseudogap in the cuprate
superconductors. Evidence from various experimental techniques points to a common …

This article discusses fluctuating order in a quantum disordered phase proximate to a
quantum critical point, with particular emphasis on fluctuating stripe order. Optimal strategies …

Electronic charges introduced in copper-oxide (CuO2) planes generate high-transition-
temperature (T c) superconductivity but, under special circumstances, they can also order …

IT is well known that BCS mean-field theory is remarkably successful in describing
conventional superconductors. A central concept of BCS theory is the energy gap in the …

A concept—quantum order—is introduced to describe a new kind of orders that generally
appear in quantum states at zero temperature. Quantum orders that characterize the …

Angle-resolved photoemission experiments reveal evidence of an energy gap in the normal
state excitation spectrum of the cuprate superconductor Bi2Sr2CaCu2O8+ δ. This gap exists …

In this review, the authors present a summary of experimental reports on newly discovered
iron-based superconductors as they were known at the end of 2008. At the same time, this …