Michael R. Norman

TL;DR: 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.

TL;DR: In this paper, a study of underdoped Bi2Sr2CaCu2O8+δ (Bi2212) using angle-resolved photoemission spectroscopy (ARPES) is presented.

TL;DR: In this article, the temperature dependence of the Fermi surface in underdoped Bi2Sr2CaCu2O8+δ superconductors was investigated using angle-resolved photoemission spectroscopy.

TL;DR: In this paper, the authors review the recent developments in the theoretical study of the spin $1/2$ Heisenberg model on a kagome lattice and discuss potential future directions, both experimental and theoretical, as well as the challenge of doping these materials.

TL;DR: In this paper, angle-resolved photoemission spectroscopy was used to show that the anisotropy of the pseudogap in k-space and the resulting arcs depend only on the ratio T/T*(x).