This is a review of the Sachdev-Ye-Kitaev (SYK) model of compressible quantum many-
body systems without quasiparticle excitations, and its connections to various theoretical …

The physics of quantum materials is dictated by many-body interactions and mathematical
concepts such as symmetry and topology that have transformed our understanding of matter …

In traditional metals, the temperature (T) dependence of electrical resistivity vanishes at low
or high T, albeit for different reasons. Here, we review a class of materials, known as …

The appearance of the Planckian time τ Pl= ℏ/k BT is reviewed in both conventional and
unconventional metals. A pedagogical discussion of the various different timescales …

In recent years, the notion of'Quantum Materials' has emerged as a powerful unifying
concept across diverse fields of science and engineering, from condensed-matter and …

The introduction of localized electronic states into a metal can alter its physical properties,
for example enabling exotic metal physics including heavy fermion and strange metal …

The perfectly linear temperature dependence of the electrical resistivity observed as T→ 0 in
a variety of metals close to a quantum critical point,,–is a major puzzle of condensed-matter …

Immediately after the discovery of high temperature superconductivity in the cuprates in
1987, properties in the metallic state above T c were discovered that violated the reigning …

A variety of 'strange metals' exhibit resistivity that decreases linearly with temperature as the
temperature decreases to zero,–, in contrast to conventional metals where resistivity …

Strange metals possess highly unconventional electrical properties, such as a linear-in-
temperature resistivity,,,,–, an inverse Hall angle that varies as temperature squared,–and a …