High pressure Raman study of the quantum magnet (C$_4$H$_{12}$N$_2$)Cu$_2$Cl$_6$

Simon Bettler; Gediminas Simutis; Gérard Perren; Dominic Blosser; Severian Gvasaliya; Andrey Zheludev

doi:10.1103/PhysRevB.96.174431

paper

High pressure Raman study of the quantum magnet (C $_{4}$ H $_{12}$ N $_{2}$ )Cu $_{2}$ Cl $_{6}$

arXiv:1705.10235 · doi:10.1103/PhysRevB.96.174431

Abstract

Magnetic and lattice excitations in the quantum antiferromagnet (C $_{4}$ H $_{12}$ N $_{2}$ )Cu $_{2}$ Cl $_{6}$ (PHCC) are studied across two pressure-induced phase transition at $P_{c} = 4.3 kbar$ and $P_{1} = 13.4 kbar$ using Raman spectroscopy. It is confirmed that neither transition is a result of a structural transformation. Magnetic scattering is detected. It shows a pronounced pressure dependence and undergoes substantial changes at both transitions. The results are in clear contradiction with previous neutron studies, which detected only minor changes of the magnon spectrum at $P_{1}$ . A number of phonons show anomalous frequency shifts at low temperatures. This effect is pressure dependent and for two of the observed phonons dramatically reverses sign at around $P_{1}$ . The anomalous behavior is attributed to strong magnetoelastic coupling in PHCC.

High pressure Raman study of the quantum magnet (C $_{4}$ H $_{12}$ N $_{2}$ )Cu $_{2}$ Cl $_{6}$

Abstract

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High pressure Raman study of the quantum magnet (C4​H12​N2​)Cu2​Cl6​

Abstract

References in corpus (8)

Cited by in corpus (5)

High pressure Raman study of the quantum magnet (C $_{4}$ H $_{12}$ N $_{2}$ )Cu $_{2}$ Cl $_{6}$