Hump Like Resistance Anomaly in Organic Conductor β''-(BEDT-TTF)₂CsCd(SCN)₄

Magnetic field dependent and induced ground states in organic conductors

“…Recently, Kondo et al [123][124][125] have reported a 'bump' in the temperature dependent resistivity of β -(BEDT-TTF) 2 CsCd(SCN) 4 below 32 K, consistent with the nesting of Q1D bands (figure 35). Moreover, they report the appearance of a superlattice from x-ray diffraction at 2.6 K of the form (0.18a*, -, 0.56c*) which would correspond to the nesting vector of the Q1D orbits in figure 35(a) and further indicates the possibility of a CDW ground state.…”

Interplay of charge-density waves and superconductivity in the organic conductorβ″−(BEDT-TTF)2AuBr2Kondo1, Higa2, Kagoshima3 et al. 2010Phys. Rev. BSelf Cite8040View full textAdd to dashboardCite

“…19 It exhibits a CDW transition accompanied by a humplike structure at 32 K in the graph of the temperature dependence of the resistivity. 20 Although we tried to unravel the superconducting behavior in CsCd salt by applying uniaxial strain, we observed only the disappearance of the humplike anomaly, indicating suppression of the CDW phase and stabilization of the normal metallic state. No superconductivity was observed down to 0.6 K. Figure 4 shows our proposed electronic phase diagram for ␤Љ-type organic conductors having two equivalent molecules in a unit cell.…”

“…18 The crystal structure analyses suggested that the electronic structure of DODHT salt under hydrostatic pressure for the superconductivity is similar to those of ␤Љ-͑BEDT-TTF͒ 2 AuBr 2 ͑abbreviated as AuBr 2 salt͒ and ␤Љ-͑BEDT-TTF͒ 2 CsCd͑SCN͒ 4 ͑abbreviated as CsCd salt͒. 19 We have found that the ground state of CsCd salt has an incommensurate CDW below 32 K. 20 These results suggest that the CDW caused by nesting of the 1D Fermi surface is realized in the normal metallic phase as a result of suppression of the charge-ordered insulating state by applying hydrostatic pressure to such ␤Љ-type organic conductors, although the relationships between the superconducting phase and the CDW phase are unclear.…”