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 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 …

Strange metals—ubiquitous in correlated quantum materials—transport electrical charge at
low temperatures but not by the individual electronic quasiparticle excitations, which carry …

A Fermi surface coupled to a scalar field can be described in a 1/N expansion by choosing
the fermion-scalar Yukawa coupling to be random in the N-dimensional flavor space, but …

We describe the large-N saddle point, and the structure of fluctuations about the saddle
point, of a theory containing a sharp, critical Fermi surface in two spatial dimensions. The …

The two-dimensional Yukawa-Sachdev-Ye-Kitaev (2D-YSYK) model provides a universal
theory of quantum phase transitions in metals in the presence of quenched random spatial …

We propose a realization of Kondo lattice physics in moiré superlattices at the interface
between a WX 2 homobilayer and Mo X 2 monolayer (X= S, Se). Under appropriate gating …

The strange metal phase of correlated electrons materials was described in a recent theory
by a model of a Fermi surface coupled a two-dimensional quantum critical bosonic field with …

A pair density wave (PDW) is a superconductor whose order parameter is a periodic function
of space, without an accompanying spatially uniform component. Since PDWs are not the …

We use a real-space slave-rotor theory of the physics of topological Mott insulators, using
the Kane-Mele-Hubbard model as an example, and show that a topological gap in the …