Artículos de revistas
Phase analysis of quantum oscillations in graphite
Registro en:
Physical Review Letters. American Physical Soc, v. 93, n. 16, 2004.
0031-9007
WOS:000224533300059
10.1103/PhysRevLett.93.166402
Autor
Luk'yanchuk, IA
Kopelevich, Y
Institución
Resumen
The quantum de Haas-van Alphen (dHvA) and Shubnikov-de Haas oscillations measured in graphite were decomposed by pass-band filtering onto contributions from three different groups of carriers. Generalizing the theory of dHvA oscillations for 2D carriers with an arbitrary spectrum and by detecting the oscillation frequencies using a method of two-dimensional phase-frequency analysis which we developed, we identified these carriers as (i) minority holes having a 2D parabolic massive spectrum p(perpendicular to)(2)/2m(perpendicular to), (ii) massive majority electrons with a 3D spectrum and (iii) majority holes with a 2D Dirac-like spectrum +/-vp(perpendicular to) which seems to be responsible for the unusual strongly-correlated electronic phenomena in graphite. 93 16