Crystal Structures of Organic Metals and Superconductors of (BEDT-TTP)-I System

Development of Conductive Organic Molecular Assemblies: Organic Metals, Superconductors, and Exotic Functional Materials

“…78 As a consequence, the requirement for an organic metal for the radical salt is to obtain a salt with m:n (m 6 ¼ n) stoichiometry together with uniform segregated stacking. However, several exceptions exhibiting a metallic behavior even with 1:1 stoichiometry have been reported by Shibaeva et al, 250 Mori et al, 251,252 and Takimiya et al 253 These complexes are based on molecules having an extended %-moiety or self-assembling ability (Table 10). The stoichiometry is one of the key parameters that govern the transport property of the CT complexes.…”

“…444 For H -(ET) 2 I 3 , the T c of H-salt was reported to be almost equal or a little higher than that of D-salt. 448 However, the inverse isotope effect for -(ET) 2 I 3 is not convincing since its T c is so sensitive to the external and internal circumstances as described in section 3.5. .…”

“…449,450 Since the T c % 8 K phase thus obtained was stable and can be isolated at ambient pressure, it was designated as t -(ET) 2 I 3 . The AMRO was first observed on -(ET) 2 IBr 2 499 and -(ET) 2 I 3 , 500 and subsequently has been utilized to study the precise shape of the Fermi surface topologically.…”

Transport Phenomena in Multilayered Massless Dirac Fermion System α-(BEDT-TTF)2I3

“…The difference among them lies in the arrangement and orientation of BEDT-TTF molecules within the conducting plane, and this difference gives rise to variations in the transport phenomena. Most of the members of this family are 2D metals with large Fermi surfaces, and some of them are superconducting with T C values of several Kelvin [11][12][13]. On the other hand, α-(BEDT-TTF) 2 I 3 is different from the other crystals.…”

“…All the crystals in this family consist of conductive layers of BEDT-TTF molecules and insulating layers of I 3 − anions as shown in Figure 1 [10][11][12][13]. The difference among them lies in the arrangement and orientation of BEDT-TTF molecules within the conducting plane, and this difference gives rise to variations in the transport phenomena.…”