ESR investigation of the low temperature state in alpha-(BEDT-TTF)(2)KHg(SCN)(4)
SYNTHETIC MET 103:1-3 (1999) 1949-1950
Abstract:
We have performed ESR measurements on an alpha-(BEDT-TTF)(2)KHg(SCN)(4) Single crystal at temperatures down to 0.9 K. Two regions where the ESR intensity decreases were observed. One corresponds to the proposed SDW transition (T approximate to 9 K); the other takes place at T less than or equal to 2 K. A new resonance line appears below the transition temperature T approximate to 9 K; its intensity grows continuously as the temperature is lowered. We regard the decrease of the ESR line at very low temperatures as evidence of a further phase transition.Fermi-surface traversal resonance in alpha-(BEDT-TTF)(2)KHg(SCN)(4)
SYNTHETIC MET 103:1-3 (1999) 2038-2039
Abstract:
We experimentally demonstrate a mechanism for a new kind of magnetic resonance, the Fermi-surface traversal resonance (FTR). This is caused by the periodic traversal of carriers across quasi-one-dimensional (Q1D) sections of Fermi surface (FS) in an external magnetic field. Owing to the warping of the Q1D Fermi sheets, the real space velocities of the carriers oscillate as they cross the FS, generating resonances in the high frequency conductivity of the material. The results contain information about the FS, including the direction and harmonic content of the warping components. Using a rotating resonant-cavity system, FTRs have been observed in alpha-(BEDT-TTF)(2)KHg(SCN)(4).Millimetre-wave response of the organic superconductor kappa-(BEDT-TTF)(2)Cu(SCN)(2)
SYNTHETIC MET 103:1-3 (1999) 1947-1948
Abstract:
A study of the electronic and superconducting properties of the organic superconductor kappa-(BEDT-TTF)(2)Cu(SCN)(2) in the millimetre-wave range is presented. The measurments are carried out using a single crystal in an unique rotating rectangular cavity. This novel technique provides information about the anisotropy of the magnetoresistance at GHz freqencies.Quantum-mechanical model of fermi-surface traversal resonance
Physical Review B - Condensed Matter and Materials Physics 60:23 (1999) 15500-15503
Abstract:
We describe a quantum-mechanical model of Fermi-surface traversal resonance (FTR), a magneto-optical resonance that occurs in quasi-one-dimensional metals. We show that the predictions of this model are in quantitative agreement with earlier semiclassical models of FTR. The agreement between the two approaches, whose starting assumptions are very different, demonstrates that it is a fundamental property of quasi-one-dimensional systems. © 1999 The American Physical Society.Fermi surface traversal resonance in metals: Two theories and an experiment
P SOC PHOTO-OPT INS 3828 (1999) 366-377