Magnetic breakdown and Landau level spectra of a tunable double-quantum-well Fermi surface
- Sandia National Labs., Albuquerque, NM (United States)
- Lucent Technologies, Murray Hill, NJ (United States). Bell Labs.
By measuring longitudinal resistance, the authors map the Landau level spectra of double quantum wells as a function of both parallel (B{sub {parallel}}) and perpendicular (B{sub {perpendicular}}) magnetic fields. In this continuously tunable highly non-parabolic system, the cyclotron masses of the two Fermi surface orbits change in opposite directions with B{sub {parallel}}. This causes the two corresponding ladders of Landau levels formed at finite B{sub {perpendicular}} to exhibit multiple crossings. They also observe a third set of landau levels, independent of B{sub {parallel}}, which arise from magnetic breakdown of the Fermi surface. Both semiclassical and full quantum mechanical calculations show good agreement with the data.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 291062
- Report Number(s):
- DOE/AL/85000--T4; CONF-9709161--; ON: DE99000402
- Country of Publication:
- United States
- Language:
- English
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