Research Highlights

13.11.2016

Spin pseudogap in the S=1/2 chain material Sr2 CuO3 with impurities

The low energy magnetic excitation spectrum of the Heisenberg antiferromagnetic S=1/2 chain system Sr2 CuO3 with Ni- and Ca-impurities is studied by neutron spectroscopy. Read more 

20.09.2016

Multiferroic phases of the frustrated quantum spin chain compound linarite

The dielectric properties of the prototypical frustrated ferromagnetic spin-chain compound PbCuSO4(OH)2 known as linarite, are studied across its strongly anisotropic magnetic phase diagram in single crystal samples. Read more 

18.07.2016

Effect of disorder on a pressure-induced z=1 magnetic quantum phase transition

Pressure-induced ordering close to a z=1 quantum critical point is studied in the presence of bond disorder in the quantum spin system (C4 H12 N2 )Cu2 (Cl1−x Brx )6 (PHCX) by means of muon-spin rotation and relaxation. Read more 

18.04.2016

Dichotomy between attractive and repulsive Tomonaga-Luttinger liquids in spin ladders

We present two methods to determine whether the interactions in a Tomonaga-Luttinger liquid (TLL) state of a spin-1/2 Heisenberg antiferromagnetic ladder are attractive or repulsive. Read more 

13.03.2016

Magnetic ordering in the ultra-pure site-diluted spin chain materials SrCu1-x Nix O2

Muon spin rotation technique is used to study magnetic ordering in ultra-pure samples of SrCu1−x Nix O2 , an archetypical S=1/2 antiferromagnetic Heisenberg chain system with a small amount of S=1 defects. Read more 

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