A hallmark of the phase diagrams of quantum materials is the existence of multiple
electronic ordered states, which, in many cases, are not independent competing phases, but …

This article reviews experimental and theoretical work on Bose-Einstein condensation in
quantum magnets. These magnets are natural realizations of gases of interacting bosons …

We present measurements of the magnetic susceptibility χ and the magnetization M of single
crystals of metallic Yb 2 Pt 2 Pb, where localized Yb moments lie on the dimerized and …

We prepare and study strongly interacting two-dimensional Bose gases in the superfluid, the
classical Berezinskii-Kosterlitz-Thouless (BKT) transition, and the vacuum-to-superfluid …

Quantum phase transitions occur when the ground state of a quantum system undergoes a
qualitative change when an external control parameter reaches a critical value. Here, we …

Single crystals of the spin dimer system Sr 3 Cr 2 O 8 have been grown for the first time.
Magnetization, heat capacity, and magnetocaloric effect data up to 65 T reveal magnetic …

In the antiferromagnetic (AF) heavy-fermion system CePdAl the magnetic Ce ions form a
network of equilateral triangles in the (001) plane, similar to the kagomé lattice, with one …

We report an S= 1 antiferromagnet K 2 Ni 2 (SeO 3) 3 crystalizing in the hexagonal space
group P 6 3/mmc. The structure consists of the perpendicular-to-plane Ni 2 O 9 dimers in the …

We have investigated the Mott transition in a quasi-two-dimensional Mott insulator EtMe 3 P
[Pd (dmit) 2] 2 with a spin-frustrated triangular-lattice in hydrostatic pressure and magnetic …

We present a detailed study in the paramagnetic regime of the frustrated s= 1/2 spin-
compound linarite PbCuSO 4 (OH) 2 with competing ferromagnetic nearest-neighbor and …