In many quantum materials, strong electron correlations lead to the emergence of new states
of matter. In particular, the study in the last decades of the complex phase diagram of high …

The origin of the pseudogap region below a temperature T* is at the heart of the mysteries of
cuprate high-temperature superconductors. Unusual properties of the pseudogap phase …

The pseudogap metal phase of the hole-doped cuprate superconductors has two seemingly
unrelated characteristics: a gap in the electronic spectrum in the “antinodal” region of the …

Polarized-neutron diffraction (PND) experiments have revealed that the pseudogap state of
the cuprates exhibits unusual intra-unit-cell (IUC) magnetism. At a qualitative level, the data …

We describe square lattice spin liquids, which break time-reversal symmetry, while
preserving translational symmetry. The states are distinguished by the manner in which they …

Intra-unit cell magnetic order has been observed in four different families of high-
temperature superconductors from polarized neutron diffraction experiments and supported …

We present an extended zero-field muon spin relaxation (ZF-μ SR) study of overdoped Bi 2+
x Sr 2− x CaCu 2 O 8+ δ (Bi2212) single crystals, intended to elucidate the origin of weak …

We report the results of a muon spin relaxation study of slow magnetic fluctuations in the
pseudogap phase of underdoped single-crystalline YBa 2 Cu 3 O y, y= 6.77 and 6.83. The …

There is growing experimental evidence that indicates discrete symmetry-breaking-like time-
reversal (T), parity (P), and C 4 lattice rotation in the pseudogap state of underdoped copper …

A model demonstrating the existence of a thermodynamically stable quantum time-space
crystal has been proposed and studied. This state is characterized by an order parameter …