Competing ferro-and antiferromagnetic exchange interactions may lead to the formation of
bound magnon pairs in the high-field phase of a frustrated quantum magnet. With …

We study the phase diagram of a frustrated spin-1 2 ferromagnetic chain with anisotropic
exchange interactions in an external magnetic field using the density matrix renormalization …

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 …

Physics is said to be universal when it emerges regardless of the underlying microscopic
details. A prominent example is the Efimov effect, which predicts the emergence of an infinite …

We study high-field phase diagram and low-energy excitations of three-dimensional (3D)
quantum helimagnets. Slightly below the saturation field, the emergence of magnetic order …

We quantify the stability of the formation of multipolar states against always present
interchain couplings in quasi-one-dimensional spin-1 2 chain systems with a frustrating in …

Here we report a study of the spin dynamics in the ferromagnetic chain compound Li 2 CuO
2. Inelastic neutron scattering measurements allow for the spin Hamiltonian to be …

A thermodynamic method to extract the interchain coupling (IC) of spatially anisotropic 2D or
3D spin-1/2 systems from their empirical saturation field H s (T= 0) is proposed. Using …

We discuss spin-1 2 one-dimensional (1D) and quasi-1D magnets with competing
ferromagnetic nearest-neighbor J 1 and antiferromagnetic next-nearest-neighbor J …

The modulational instability, quantum breathers and two-breathers in a frustrated easy-axis
ferromagnetic zig-zag chain under an external magnetic field are investigated within the …