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dc.contributor.authorTu, Chi-Shun
dc.contributor.authorKatiyar, R.S.
dc.contributor.authorSchmidt, V. Hugo
dc.contributor.authorGuo, R.
dc.contributor.authorBahalla, A.S.
dc.date.accessioned2016-04-18T22:58:11Z
dc.date.available2016-04-18T22:58:11Z
dc.date.issued1999-01-01
dc.identifier.citationC.‑S. Tu, R.S. Katiyar, V.H. Schmidt, R. Guo, and A.S. Bhalla, “Hypersonic anomalies and optical properties of RbTiOAsO4 and KTiOPO4 single crystals,” Phys. Rev. B 59, 251-256 (1999).en_US
dc.identifier.issn1098-0121
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/9703
dc.description.abstractThe longitudinal (LA) Brillouin back-scattering spectra along the [001] phonon direction have been measured as a function of temperature for RbTiOAsO4 (RTA) and KTiOPO4 (KTP) single crystals. As temperature increases, the acoustic-phonon frequencies of RTA and KTP show a clear softening (which reaches a turning point at Tc∼800°C for RTA). We conclude that the transitions in RTA and KTP are either weakly first order or of second order. It seems likely that the alkali ions (K+ or Rb+) are strongly involved in the soft mode. A broad damping evolution (which attains a maximum at Tc∼800 °C in RTA) was observed for both crystals and can be attributed to the dynamic order-parameter fluctuations. The optical transmissions, refractive indices (nx,ny,nz) and the Cauchy equations (for RTA) were obtained as a function of wavelength. The LA[001] sound velocities VLA and elastic constants C33+(e233/ɛs33) were also calculated at room temperature for both crystals.en_US
dc.titleHypersonic anomalies and optical properties of RbTiOAsO4 and KTiOPO4 single crystalsen_US
dc.typeArticleen_US
mus.citation.extentfirstpage251en_US
mus.citation.extentlastpage256en_US
mus.citation.issue1en_US
mus.citation.journaltitlePhysical Review Ben_US
mus.citation.volume59en_US
mus.identifier.categoryChemical & Material Sciencesen_US
mus.identifier.categoryPhysics & Mathematicsen_US
mus.identifier.doi10.1103/PhysRevB.59.251en_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentPhysics.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.data.thumbpage2en_US


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