Calculations of quantum oscillations in quasi-two-dimensional charge-transfer salts
Synthetic Metals 86:1 -3 pt 3 (1997) 1907-1908
Abstract:
A numerical model is used to derive the quantum oscillations in the magnetisation and magnetoresistance of quasi-two-dimensional α-phase BEDT-TTF charge-transfer salts in high magnetic fields. Recent experimental results are simulated and the standard Lifshitz-Kosevich formalism is shown to be no longer appropriate.Harmonics of the real-space velocity in cyclotron resonance experiments on organic metals
Physical Review B - Condensed Matter and Materials Physics 55:10 (1997) R6129-R6132
Abstract:
Electrons in cyclotron orbits around closed pockets in the Fermi surfaces of organic metals possess an oscillating real-space velocity. Higher harmonics of this real-space velocity lead to predicted cyclotron resonances additional to those normally expected. We calculate these resonances semiclassically using the Boltzmann transport equation. These higher harmonics are expected to occur remarkably often, and we show that they are found even in a very simple tight-binding model. A similar effect occurs in quasi-one-dimensional Fermi surfaces which are highly corrugated and in this case the oscillating part of the real-space velocity as it traverses the Fermi surface can couple directly to the microwave frequency. © 1997 The American Physical Society.Investigation of vortex behavior in the organic superconductor κ-(BEDT-TTF)2 Cu(SCN)2 using muon spin rotation
Physical Review Letters 79:8 (1997) 1563-1566
Abstract:
Muon spin rotation (μSR) measurements have been performed on the organic superconductor κ-(BEDT-TTF)2Cu(SCN)2in order to investigate its exotic vortex behavior. Previously unobserved features of the μSR line shapes have been measured at low fields and temperatures. In the mixed state the existence of a lattice composed of linear vortices is demonstrated at low fields. The breakup of this well-ordered lattice has furthermore been observed as a function of both field and temperature. © 1997 The American Physical Society.Muon studies of organic ferromagnets and conductors
Applied Magnetic Resonance 13:1-2 (1997) 155-164
Abstract:
Muon spin rotation (μSR) experiments can be especially helpful in the study of various organic molecular materials. The technique has been used to study the magnetization in nitronyl nitroxide organic ferromagnets, the spin-density-wave ground state in various charge transfer salts, the dynamics of carriers in organic conductors and the vortex structures in organic superconductors. I outline the motivation for studying these new materials and review and discuss the results of recent work.Pressure and angle-dependent Shubnikov-de Haas studies of the spin-density-wave state of α-(BEDT-TTF)2 KHg(SCN)4
Synthetic Metals 86:1 -3 pt 3 (1997) 1949-1950