Spin and Charge Transport in the X-ray Irradiated Quasi-2D Layered Compound: -(BEDT-TTF)2Cu[N(CN)2]Cl
نویسندگان
چکیده
The interplane spin cross relaxation time Tx measured by high frequency ESR in X-ray irradiated κ-(BEDT-TTF)2Cu[N(CN)2]Cl is compared to the interplane resisitivity ρ⊥ and the in-plane resistivity ρ‖ between 50 K and 250 K. The irradiation transforms the semiconductor behavior of the non-irradiated crystal into metallic. Irradiation decreases Tx, ρ⊥ and ρ‖ but the ratio Tx/ρ⊥ and ρ⊥/ρ‖ remain unchanged between 50 and 250 K. Models describing the unusual defect concentration dependence in κ-(BEDT-TTF)2Cu[N(CN)2]Cl are discussed.
منابع مشابه
Anomalous Behavior of the Thermoelectric Power in the Vicinity of the Superconducting Transition in the Organic Superconductors κ-(BEDT-TTF)2Cu(NCS)2 and κ-(BEDT-TTF)2Cu[ N(CN)2] Br
Trie in-plane thermoelectric power (TEP of trie layered orgamc superconductors ~-(BEDT-TTF)2Cu(NCS)2 and ~-(BEDT-TTF)2Cu[N(CN)2]Br bas been studied in trie vicinity of trie superconducting transition under magnetic field. Below trie transition temperature, an anomalous non-monotonic behavior of trie TEP is found in trie ~-(BEDT-TTF)2Cu(NCS)2 sait: instead of a graduai monotonic decrease, trie T...
متن کاملSpin fluctuations and the pseudogap in organic superconductors
We show that there are strong similarities in the spin-lattice relaxation of nonmagnetic organic chargetransfer salts and that these similarities can be understood in terms of spin fluctuations. Further, we show that, in all of the -phase organic superconductors for which there is nuclear-magnetic-resonance data, the energy scale for the spin fluctuations coincides with the energy scale for the...
متن کاملAntiferromagnetic resonance of the organic compound k-„BEDT-TTF...2Cu†N„CN...2‡Br with deuterated BEDT-TTF
In the nonmetallic state of the organic superconductor k-~BEDT-TTF)2Cu@N(CN)2#Br synthesized with deuterated BEDT-TTF molecule, an angle-dependent electron spin resonance signal below 6–8 K was found. This is interpreted in terms of an antiferromagnetic resonance. The signal was found only when the sample was rapidly cooled, corresponding to the characteristics in that the present salt stays cl...
متن کاملInterlayer magnetoresistance in the organic superconductor k-„BEDT-TTF...2Cu†N„CN...2‡Br near the superconducting transition
In this paper, we report transport measurements of interlayer magnetoresistance with field parallel and perpendicular to the current direction in the organic superconductor k-(BEDT-TTF)2Cu@N(CN)2#Br. For HiJ , the isothermal magnetoresistance R(H) displays a peak effect as a function of field. While the magnetoresistance at small field can be fitted to stacked Josephson junction model, the nega...
متن کاملFirst-principle density-functional calculation of the Raman spectra of BEDT-TTF
We present a first-principles density-functional calculation for the Raman spectra of a neutral BEDT-TTF molecule. Our results are in excellent agreement with experimental results. We show that a planar structure is not a stable state of a neutral BEDT-TTF molecule. We consider three possible conformations and discuss their relation to disorder in these systems. Crystals based on the BEDT-TTF m...
متن کامل