Abstract
The microwave surface resistance of potassium in a perpendicular magnetic field, measured by Baraff, Grimes, and Platzman in 1969, has never been completely explained until now. The sharp cyclotron resonance peak (at a magnetic field (Formula presented)) is caused by the small cylindrical section of Fermi surface created by the charge-density-wave (CDW) minigaps, having periodicities K(Formula presented)=(n+1)Q→-(Formula presented). The shape of the observed resonance requires a tilt of the CDW vector Q→ away from [110], predicted by Giuliani and Overhauser in 1979. An abrupt drop of the surface resistance for |H|≳|(Formula presented)| is caused by the heterodyne gaps, which have periodicities K(Formula presented)=n(G(Formula presented)-Q→). These very small gaps, which begin to undergo magnetic breakdown for fields H≳1 T, interrupt the cyclotron motion of equatorial orbits. The abrupt drop in surface resistance for |H|≳|(Formula presented)| is caused by the resulting partial loss of carrier effectiveness for electrons having velocities nearly parallel to the surface.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1597-1609 |
| Number of pages | 13 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 54 |
| Issue number | 3 |
| DOIs | |
| State | Published - 1996 |
| Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics