Kavli Affiliate: Giordano Scappucci
| First 5 Authors: Davide Costa, Davide Costa, , ,
| Summary:
Evaluation of critical bandstructure and quantum transport parameters in
two-dimensional systems is challenging when competition emerges among different
energy scales shaping quantum oscillations in a magnetic field. Here we
overcome this challenge in low-disorder strained germanium quantum wells by
evaluating self-consistently effective mass, g-factor, and quantum lifetime. As
a result, we estimate a quantum mobility of 133(3)$times$10$^3$ cm$^2$/Vs,
setting a benchmark for 2D holes in group IV semiconductors. The high quality
of the hole gas if further highlighted by observing clean fractional quantum
Hall states at low magnetic field and low density.
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