Extensive experimental investigations of the magnetic structures and excitations in the XY
pyrochlores have been carried out over the past decade. Three families of XY pyrochlores …

We argue that several empirical constraints strongly restrict parameters of the effective
microscopic spin model describing α-RuCl 3. In particular, such constraints dictate a …

The search for quantum spin liquids—topological magnets with fractionalized excitations—
has been a central theme in condensed matter and materials physics. Despite numerous …

The most fascinating feature of certain two-dimensional (2D) gapless quantum spin liquid
(QSL) is that their spinon excitations behave like the fermionic carriers of a paramagnetic …

The stereochemical activity of lone pair electrons plays a central role in determining the
structural and electronic properties of both chemically simple materials such as H2O, as well …

We use neutron scattering to show that ferromagnetism and antiferromagnetism coexist in
the low T state of the pyrochlore quantum magnet Yb 2 Ti 2 O 7. While magnetic Bragg …

Recently there have been a number of experiments on Ce 2 Zr 2 O 7 and Ce 2 Sn 2 O 7,
suggesting that these materials host a three-dimensional quantum spin liquid with emergent …

Anomalous compression behaviors such as negative linear compressibility (NLC) and
negative area compressibility (NAC) are emerging functionalities essential for utilities under …

Pyrochlore systems are ideally suited to the exploration of geometrical frustration in three
dimensions, and their rich phenomenology encompasses topological order and fractional …

Little is so far known about the magnetism of the A 2 B 2 O 7 monoclinic layered perovskites
that replace the spin-ice supporting pyrochlore structure for r A/r B> 1.78. We show that high …