High field NMR in strongly correlated low-dimensional fermionic systems

摘要

We review some recent NMR results obtained in Grenoble High Magnetic Field Laboratory on magnetic field induced phenomena in strongly correlated low-dimensional fermionic systems: i) magnetic field dependence of the soliton lattice in the IC phase of the spin-Peierls system CuGeO3, ii) NMR study of the complete H-T phase diagram of the organo-metallic spin ladder Cu-2(C5H12N2)(2)Cl-4, and iii) the first "standard" NMR measurements (i.e., without optical pumping) on 2D electrons in Quantum wells, providing a detailed description of the fractional quantum Hall effect state at v = 1/2 with the first determination of the corresponding effective polarization mass of composite fermions. Latest study of the v = 2/3 state revealed, among other features, an unexpected phase transition. [References: 31]