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Institute Quantum Phenomena in Novel Materials

Quantum magnetism and frustrated magnets

In the following we present selected examples of recent research in the fields of quantum magnetism and frustrated magnets

For a full list of publications of our institute click here


Artist's view of quantum entaglement © Nathan Armistead/ORNL, U.S. Dept. of Energy

(a) Excitation spectra obtained on a single crystal of SrCuTe2O6 using the time-of-flight spectrometer LET and (b) the simulated dynamical structure of a spin - 1/2 Heisenberg antiferromagnetic chain.


Two of the four magnetic interactions form a new three-dimensional network of corner-sharing triangles, known as the hyper-hyperkagome lattice, leading to the quantum spin liquid behavior in PbCuTe2O6 ©HZB

Bethe strings

In the ground state the magnetic moments are either upward or downward, the spins antiparallel to the external magnetic field (red) are never together (right). By excitation, further spins can align antiparallel and Bethe chains are formed (white spins, left). © HZB

Neutron scattering pattern of Nd2Zr2O7

Forced spin arrangement in (110) field

Forced spin arrangement in (110) field


enlarged view

Background-subtracted inelastic neutron scattering data along (6,0,l) for BaCu2V2O8.


enlarged view

Snapshot of the fluctuating ground state spin arrangement for one bi-triangle. © Macmillan Publishers Ltd.


BaNi2V2O8 - enlarged view

Crystal and magnetic structure (one twin) of BaNi2V2O8 within a honeycomb plane


enlarged view

Magnetic excitations of spinon pairs with total pseudospin S=1 corresponding to an odd number of pseudospin-1/2 flips.