Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tuning the orbital-lattice fluctuations in the mixed spin-dimer system
  Ba$_{3-x}$Sr$_{x}$Cr$_{2}$O$_{8}$   In $A_{3}$Cr$_{2}$O$_{8}$, where $A$ = Sr or Ba, the Cr$^{5+}$ ions
surrounded by oxygen ions in a tetrahedral coordination are Jahn-Teller active.
The Jahn-Teller distortion leads to a structural transition and a related
emergence of three twinned monoclinic domains below the structural phase
transition. This transition is highly dynamic over an extended temperature
range for $A$ = Sr. We have investigated mixed compounds
Ba$_{3-x}$Sr$_{x}$Cr$_{2}$O$_{8}$ with $x=2.9$ and $x=2.8$ by means of X-ray
and neutron diffraction, Raman scattering and calorimetry. Based on the
obtained evolution of the phonon frequencies, we find a distinct suppression of
the orbital-lattice fluctuation regime with increasing Ba content. This stands
in contrast to the linear behaviour exhibited by unit cell volumes, atomic
positions and intradimer spin-spin exchange interactions.

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The categories of this paper are: hep-lat
1
The categories of this paper are: cs
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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: bayes-an
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The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: eess