Finite Temperature Effects in One-dimensional Mott-Hubbard Insulator: Angle-Resolved Photoemission Study of Na_{0.96}V_{2}O_{5}

Abstract

We have made an angle-resolved photoemission study of a one-dimensional (1D) Mott-Hubbard insulator Na_{0.96}V_{2}O_{5} and found that the spectra of the V 3d lower Hubbard band are strongly dependent on the temperature. We have calculated the one-particle spectral function of the one-dimensional t-J model at finite temperatures by exact diagonalization and compared them with the experimental results. Good overall agreement is obtained between experiment and theory. The strong finite temperature effects are discussed in terms of the existence of the ``Fermi surface'' of the spinon band.

4 pages, 3 figures

References in corpus (4)

• NaV_2O_5 as a quarter-filled ladder compound
• A new view of the electronic structure of the spin-Peierls compound alpha'-NaV2O5
• Spin-Charge Separation in Angle-Resolved Photoemission Spectra
• Finite temperature spectral-functions of strongly correlated one-dimensional electron systems

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