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Volumn 79, Issue 7, 2009, Pages

Pressure dependence of the single particle excitation in the charge-density-wave CeTe3 system

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EID: 62349092349     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.79.075117     Document Type: Article
Times cited : (15)

References (36)
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    • Our previous investigations, reported in Ref., were extending down to 2700 cm-1 but only up to 8000 cm-1, while the present work focuses the attention on the high-frequency interval up to 1.5× 104 cm-1.
    • Our previous investigations, reported in Ref., were extending down to 2700 cm-1 but only up to 8000 cm-1, while the present work focuses the attention on the high-frequency interval up to 1.5× 104 cm-1.
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    • The reflection coefficient for the experimental arrangement given by the sample and the diamond window of the DAC is defined by r = (n′ - n) / (n′ + n) (Ref.), with n′ =2.42 being the refractive index of diamond 10.1364/AO.37.005731
    • The reflection coefficient for the experimental arrangement given by the sample and the diamond window of the DAC is defined by r = (n′ - n) / (n′ + n) (Ref.), with n′ =2.42 being the refractive index of diamond [P. Dore, A. Nucara, D. Cannavó, G. De Marzi, P. Calvani, A. Marcelli, R. S. Sussmann, A. J. Whitehead, C. N. Dodge, A. J. Krehan, and H. J. Peters, Appl. Optics 37, 5731 (1998)] and n being the complex refractive index of CeTe3 (Ref.). 10.1364/AO.37.005731
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    • Dore, P.1    Nucara, A.2    Cannavó, D.3    De Marzi, G.4    Calvani, P.5    Marcelli, A.6    Sussmann, R.S.7    Whitehead, A.J.8    Dodge, C.N.9    Krehan, A.J.10    Peters, H.J.11
  • 28
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    • Three h.o.'s are enough to phenomenologically reproduce the SP midinfrared feature defining the CDW gap. The h.o.'s mainly account for the spectral weight encountered in the SP absorption. The distribution of CDW gaps, evinced from angle resolved photoemission spectroscopy (ARPES) (Ref.), might also be addressed by an almost continuous distribution of Lorentz h.o.'s. Such an approach would go however beyond the scope of the Lorentz-Drude fit because of the large amount of fit parameters thus involved.
    • Three h.o.'s are enough to phenomenologically reproduce the SP midinfrared feature defining the CDW gap. The h.o.'s mainly account for the spectral weight encountered in the SP absorption. The distribution of CDW gaps, evinced from angle resolved photoemission spectroscopy (ARPES) (Ref.), might also be addressed by an almost continuous distribution of Lorentz h.o.'s. Such an approach would go however beyond the scope of the Lorentz-Drude fit because of the large amount of fit parameters thus involved.
  • 30
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    • While the power-law behavior is reproducible in several data sets, we emphasize nevertheless that σ1 (ω) ∼ ω-η is established over a limited energy interval (i.e., less than a decade).
    • While the power-law behavior is reproducible in several data sets, we emphasize nevertheless that σ1 (ω) ∼ ω-η is established over a limited energy interval (i.e., less than a decade).
  • 34
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    • Selecting different (smaller) spectral ranges above the CDW gap feature in σ1 (ω) for the power-law fit leads to fluctuations in the exponent η within 10% of the values reported in Table 1. The error bars in the inset of Fig. 5 account for those fluctuations.
    • Selecting different (smaller) spectral ranges above the CDW gap feature in σ1 (ω) for the power-law fit leads to fluctuations in the exponent η within 10% of the values reported in Table 1. The error bars in the inset of Fig. 5 account for those fluctuations.


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