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Journal of the Physical Society of Japan
Volumn 78, Issue 4, 2009, Pages
Charge order-disorder phase transition in α'-[bis(ethylenedithio) tetrathiafulvalene] 2IBr 2 [α'-(BEDT-TTF) 2IBr 2]
Author keywords

BEDT TTF; Charge order; Optical conductivity; Order disorder; Raman spectrum
Indexed keywords

EID: 67649226742     PISSN: 00319015     EISSN: 13474073     Source Type: Journal    
DOI: 10.1143/JPSJ.78.044701     Document Type: Article
Times cited : (21)
References (54)
  • 2
  • 20
    • 0034529179 scopus 로고    scopus 로고
    • K. Yakushi: Bull. Ghent. Soc. Jpn. 73 (2000) 264.3.
    • K. Yakushi: Bull. Ghent. Soc. Jpn. 73 (2000) 264.3.
  • 24
    • 67649142857 scopus 로고    scopus 로고
    • The optical conductivity for E\\b polarization is smaller by half than that for E Lb polarization. The far-infrared region of the E || b spectrum was oscillated due to the interference effect.
    • The optical conductivity for E\\b polarization is smaller by half than that for E Lb polarization. The far-infrared region of the E || b spectrum was oscillated due to the interference effect.
  • 29
    • 84869326206 scopus 로고    scopus 로고
    • The exponent of σ (omega;) = σ (0) + Aωs in the low-frequency region cannot be estimated, because the vibronic modes appearing down to ∼270cm-l disturbs the line shape in a wide temperature range.
    • The exponent of σ (omega;) = σ (0) + Aωs in the low-frequency region cannot be estimated, because the vibronic modes appearing down to ∼270cm-l disturbs the line shape in a wide temperature range.
  • 43
    • 67649177072 scopus 로고    scopus 로고
    • For estimation, we used the empirical relation t = - 1 OS eV, where S is an overlap integral.
    • For estimation, we used the empirical relation t = - 1 OS eV, where S is an overlap integral.
  • 44
    • 84869297674 scopus 로고    scopus 로고
    • D (εF) is the density of state at the Fermi level. According the numerical calculation of the density of state, D (εF) was calculated to be ∼|t|-1.
    • D (εF) is the density of state at the Fermi level. According the numerical calculation of the density of state, D (εF) was calculated to be ∼|t|-1.
  • 48
    • 67649140567 scopus 로고    scopus 로고
    • The very small splitting (5 cm-1) is consistent with the factor group splitting
    • 1) is consistent with the factor group splitting.
  • 51
    • 67649150541 scopus 로고    scopus 로고
    • The site is represented as A (n, m), A' (n, m), B (n, ro), and B' (n, m), where n and m show the unit cell numbers along the a - and b -axes, respectively. The unit cell number shown in Fig. 8 corresponds to n = 0 and m = 0.
    • The site is represented as A (n, m), A' (n, m), B (n, ro), and B' (n, m), where n and m show the unit cell numbers along the a - and b -axes, respectively. The unit cell number shown in Fig. 8 corresponds to n = 0 and m = 0.
  • 52
    • 84869311300 scopus 로고    scopus 로고
    • We tentatively applied the two-dimensional variable-range-hopping model, assuming that the density of state per hole is equal to (0.06 eV, 1, which is the inverse of the activation energy of hopping rate. The estimated localization length (ξ= 30-40 Å) was too large for this localized model
    • We tentatively applied the two-dimensional variable-range-hopping model, assuming that the density of state per hole is equal to (0.06 eV) -1, which is the inverse of the activation energy of hopping rate. The estimated localization length (ξ= 30-40 Å) was too large for this localized model.
  • 53
  • 54
    • 67649142856 scopus 로고    scopus 로고
    • The room-temperature Raman signal appears to be different from the low-temperature signal. This is probably because the Raman signal at room temperature is very broad
    • The room-temperature Raman signal appears to be different from the low-temperature signal. This is probably because the Raman signal at room temperature is very broad.

* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.