18 citations · 52 across the 5 of their papers we have counts for
5 papers
Investigating field-induced magnetic order in Han Purple by neutron scattering up to 25.9 T
S. Allenspach, A. Madsen, A. Biffin +14
BaCuSiO is a quasi-two-dimensional (2D) quantum antiferromagnet containing three different types of stacked, square-lattice bilayer hosting spin-1/2 dimers. Although this c…
Revealing three-dimensional quantum criticality by Sr-substitution in Han Purple
Stephan Allenspach, Pascal Puphal, Joosep Link +20
Classical and quantum phase transitions (QPTs), with their accompanying concepts of criticality and universality, are a cornerstone of statistical thermodynamics. An exemplary cont…
Ultrafast Frustration-Breaking and Magnetophononic Driving of Singlet Excitations in a Quantum Magnet
Flavio Giorgianni, Björn Wehinger, Stephan Allenspach +6
Ideal magnetic frustration forms the basis for the emergence of exotic quantum spin states that are entirely nonmagnetic. Such singlet spin states are the defining feature of the S…
Multiple Magnetic Bilayers and Unconventional Criticality without Frustration in BaCuSiO
S. Allenspach, A. Biffin, U. Stuhr +9
The dimerized quantum magnet BaCuSiO was proposed as an example of "dimensional reduction" arising near the magnetic-field-induced quantum critical point (QCP) due to perfe…
Floating Zone Growth of Sr Substituted Han Purple: BaSrCuSiO
Pascal Puphal, Stephan Allenspach, Christian Rüegg +1
We present a route to grow single crystals of BaSrCuSiO suitable for inelastic neutron studies via the floating zone technique. Neutron single crystal d…