Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-08-17
Physics
Condensed Matter
Strongly Correlated Electrons
Accepted for publication in Physical Review B
Scientific paper
10.1103/PhysRevB.74.113107
Angle resolved photoemission spectroscopy (ARPES) has been performed on quasi-one dimensional Li0.9Mo6O17 using photon energy 500 eV. Measured band dispersions are in agreement with those from both low photon energy measurements and band structure calculations. The momentum integrated ARPES spectrum is well fit by the finite temperature Luttinger liquid (LL)spectral function, with an anomalous exponent 0.6 that is the same within experimental uncertainty as the value found with photon energy 30 eV. These identical findings at both low and high photon energies are entirely consistent with reasoning based on the crystal structure, that the quasi-one dimensional chains lie two layers below the cleavage plane so that the observed spectroscopic LL behavior of Li0.9Mo6O17 is a bulk property.
Allen John William
He Jingsong
Jin Rongying
Kim Hae-Dong
Mandrus David
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