Infrared study of spin-Peierls compound alpha'-NaV2O5

Abstract

Infrared reflectance of alpha'-NaV2O5 single crystals in the frequency range from 50 cm-1 to 10000 cm-1 was studied for a, b and c-polarisations. In addition to phonon modes identification, for the a-polarised spectrum a broad continuum absorption in the range of 1D magnetic excitation energies was found. The strong near-IR absorption band at 0.8 eV shows a strong anisotropy with vanishing intensity in c-polarisation. Activation of new phonons due to the lattice dimerisation were detected below 35K as well as pretransitional structural fluctuations up to 65K.

3 pages, 2 figures, 1 table. Contributed paper for the SCES'98 (15-18 July 1998, Paris). To be published in Physica B

References in corpus (4)

• NaV_2O_5 as a quarter-filled ladder compound
• Experimental evidence for a spin-Peierls-transition in ${\alpha }^{\prime }-Na{V}_2{O}_5$
• Charged Magnons in NaV2O5
• Study of spin-Peierls transition in alpha'--NaV2O5 by infrared reflectivity

Cited by in corpus (6)

• Thermodynamics of Spin S = 1/2 Antiferromagnetic Uniform and Alternating-Exchange Heisenberg Chains
• Optical spectroscopic study of the interplay of spin and charge in NaV2O5
• Low temperature ellipsometry of NaV2O5
• Low energy excitations and dynamic Dzyaloshinskii-Moriya interaction in ${\alpha }^{\prime }$-NaV${}_2$O${}_5$ studied by far infrared spectroscopy
• Optical properties and electronic structure of Ca-doped alpha'-NaV2O5
• Lattice vibrations of alpha'-NaV_2O_5 in the low-temperature phase. Magnetic bound states?