In materials with strong local Coulomb interactions, simple defects such as atomic
substitutions strongly affect both macroscopic and local properties of the system. A …

The bulk-boundary correspondence is a defining feature of topological states of matter.
However, for quantum magnets in two dimensions such as spin liquids or topological …

Two new gapless quantum spin-liquid candidates with S= 1 (Ni 2+) moments: the 6 HB
phase of Ba 3 NiSb 2 O 9 with a Ni 2+-triangular lattice and the 3C phase with a Ni 2/3 Sb …

Molecular nanomagnets are among the first examples of finite-size spin systems and have
been test beds for addressing several phenomena in quantum dynamics. In fact, for short …

We theoretically explore the possibility of realizing the symmetry-protected topological
Haldane phase of spin-1 chains in a tunable hybrid platform of superconducting islands …

The charge ordered structure of ions and vacancies characterizing rare-earth pyrochlore
oxides serves as a model for the study of geometrically frustrated magnetism. The …

Spin-1/2 Heisenberg antiferromagnetic chains are excellent one-dimensional platforms for
exploring quantum magnetic states and quasiparticle fractionalization. Understanding its …

One of the most famous quantum systems with topological properties, the spin S= 1
antiferromagnetic Heisenberg chain, is well-known to display exotic S= 1/2 edge states …

The emergence of effective S= 1/2 spins at the edges of S= 1 Haldane spin chains is one of
the simplest examples of fractionalization. Whereas there is indirect evidence of this …

Spin fluctuations are reported near the magnetic field—driven quantum critical point in YbRh
2 Si 2. On cooling, ferromagnetic fluctuations evolve into incommensurate correlations …