Revealing three-dimensional quantum criticality by Sr substitution in Han purple

Stephan Allenspach,Pascal Puphal,Joosep Link,Ivo Heinmaa,Ekaterina Pomjakushina,Cornelius Krellner,Jakob Lass,G. S. Tucker,Christof Niedermayer,Shusaku Imajo,Yoshimitsu Kohama,Koichi Kindo,Steffen Krämer,Mladen Horvatić,Marcelo Jaime,Alexander Madsen,Antonietta Mira,Nicolas Laflorencie,Frederic Mila,Bruce Normand,Christian Rüegg,Raivo Stern,Franziska Weickert

Revealing three-dimensional quantum criticality by Sr substitution in Han purple

2021

This work shows that weak chemical substitution in BaCuSi${}_{2}$O${}_{6}$ causes a structural transition that restores the spin model of stacked dimer bilayers.

Keywords:

Antiferromagnetism
Ground state
Dimer
Crystallography
substitution
Bose–Einstein condensate
Quantum
Physics
Phase transition
Spin model

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