Optical study of phonons and electronic excitations in tetragonal Sr$_2$VO$_4$

J. Teyssier; R. Viennois; E. Giannini; R. M. Eremina; A. G. Gunter; J. Deisenhofer; M. V. Eremin; D. van der Marel

doi:10.1103/PhysRevB.84.205130

Optical study of phonons and electronic excitations in tetragonal Sr$_2$VO$_4$

Strongly Correlated Electrons 2015-05-30 v1

Authors: J. Teyssier , R. Viennois , E. Giannini , R. M. Eremina , A. G. Gunter , J. Deisenhofer , M. V. Eremin , D. van der Marel

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Abstract

We report on the optical excitation spectra in Sr $_2$ VO $_4$ . The phonon modes are assigned and their evolution with temperature is discussed in the frame of the different phase transitions crossed upon cooling. Besides the expected infrared-active phonons we observe two additional excitations at about 290 cm $^{-1}$ and 840 cm $^{-1}$ which could correspond to electronic transitions of the V $^{4+}$ ions. Our experimental results are discussed in the context of recent experimental and theoretical studies of this material with a unique spin-orbital ground state.

Keywords

Sr$_2$VO$_4$ optical excitation spectra phonon modes phase transitions electronic excitations V$^{4+}$ ions spin-orbital ground state

Cite

@article{arxiv.1110.1542,
  title  = {Optical study of phonons and electronic excitations in tetragonal Sr$_2$VO$_4$},
  author = {J. Teyssier and R. Viennois and E. Giannini and R. M. Eremina and A. G. Gunter and J. Deisenhofer and M. V. Eremin and D. van der Marel},
  journal= {arXiv preprint arXiv:1110.1542},
  year   = {2015}
}

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7 pages, 6 figures

Optical study of phonons and electronic excitations in tetragonal Sr$_2$VO$_4$

Abstract

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