Giant quantum oscillations of the longitudinal magnetoresistance in quasi-two-dimensional metals
Abstract
We have investigated in frame of the quantum transport theory the magnetic quantum oscillations of the longitudinal magnetoresistance ρzz in quasi-two-dimensional (2D) metals for a magnetic field perpendicular to the layers. Giant Shubnikov-de Haas oscillations are found when the cyclotron energy ℏ ωc is much larger than the interlayer transfer integral t (the 2D limit). In large magnetic fields and at low temperatures, the minima of the magnetoconductivity σzz= ρzz-1 exhibit a thermally activated behavior in presence of negligibly small chemical potential oscillations, as observed in the organic layered conductor β″-(BEDT-TTF) 2SF 5CH 2CF 2SO 3. The questions concerning the absence of strong chemical potential oscillations in such compound and the impurity self-energy are discussed.
- Publication:
-
Physica B Condensed Matter
- Pub Date:
- April 2004
- DOI:
- 10.1016/j.physb.2004.01.113
- arXiv:
- arXiv:cond-mat/0310563
- Bibcode:
- 2004PhyB..346..392C
- Keywords:
-
- Landau levels;
- Shubnikov-de Haas effect;
- Chemical potential oscillations;
- Quasi-two-dimensional metals;
- β''-(BEDT-TTF)2SF5CH2CF2SO3;
- Condensed Matter
- E-Print:
- 4 pages, intended for publication in special issue of Physica B for RHMF 2003 Conference, Toulouse