Landau levels, electric dipole transitions, and the Hofstadter butterfly in finite systems
J PHYS IV 114 (2004) 283-284
Abstract:
We present the results of numerical calculations of the energy levels and eigenfunctions of finite sections of a tight-binding square lattice in the presence of a perpendicular magnetic field. The energy spectrum of such a system, plotted as a function of magnetic field, resembles the Hofstadter butterfly found for the infinite system. In high magnetic fields, each eigenstate carries a persistent current which has a chirality associated with whether the eigenstate exists in the bulk or the edge of the system. We present simulations of electric dipole transitions between the chirally distinguished states for an isotropic lattice. These transitions correspond to harmonics in the cyclotron resonance.Millimetre-wave and magnetic studies on a high-spin molecule, Cr-10(OMe)(20)(O2CCMe3)(10)
J PHYS IV 114 (2004) 645-647
Abstract:
We report millimetre-wave and magnetic measurements on single crystals of the high-spin molecular magnet, Cr-10(OMe)(20)(O2CCMe3)(10). The susceptibility data obtained using a SQUID magnetometer indicate that this molecule has a total spin of S = 15. The temperature dependence of the magnetisation allows us to estimate the intermolecular exchange constant. The EPR spectra were obtained at different frequencies, angles and temperatures. The results are compared with numerical simulations allowing determination of the Hamiltonian parameters.The effect of magnetic ions and disorder on superconducting beta ''-(BEDT-TTF)(4)[(H3O)M(C2O4)(3)]center dot C6H5NO2 salts, where M = Ga and Cr
J PHYS IV 114 (2004) 285-287
Abstract:
We report in magnetotransport measurements performed in magnetic fields of up to 33 T and at low temperatures (0.45 KMeasuring errors in single qubit rotations by pulsed electron paramagnetic resonance
(2004)
Molecular Motion of Endohedral Fullerenes in Single‐Walled Carbon Nanotubes
Angewandte Chemie Wiley 116:11 (2004) 1410-1413