Cyclotron resonance of two dimensional Rashba systems in InGaAs

Superradiant decay of cyclotron resonance of two-dimensional electron gases.

We report on the observation of collective radiative decay, or superradiance, of cyclotron resonance (CR) in high-mobility two-dimensional electron gases in GaAs quantum wells using time-domain terahertz magnetospectroscopy. The decay rate of coherent CR oscillations increases linearly with the electron density in a wide range, which is a hallmark of superradiant damping. Our fully quantum mech...

Cyclotron resonance for two-dimensional electrons on thin helium films

We present a systematic investigation of the microwave absorption for two-dimensional electron layers on thin helium films and in the presence of a cyclotron resonance ~CR! magnetic field. To explain the measured data, a recently proposed two-fraction structure of the electron system is used and here described in detail. Hereby the problem of substrate roughness, usually always present for elec...

Two-dimensional square buckled Rashba lead chalcogenides

Paul Z. Hanakata,1,* A. S. Rodin,2 Alexandra Carvalho,2 Harold S. Park,3 David K. Campbell,1,† and A. H. Castro Neto2 1Department of Physics, Boston University, Boston, Massachusetts 02215, USA 2Centre for Advanced 2D Materials and Graphene Research Centre, National University of Singapore, 6 Science Drive 2, 117546, Singapore 3Department of Mechanical Engineering, Boston University, Boston, Ma...

Two-dimensional cyclotron-resonance maser array: Spectral measurements with one and two electron beams

The cyclotron-resonance-maser ~CRM! array is a device in which separate electron beams perform simultaneously a cyclotron interaction with a single Bloch wave in an artificial lattice. The CRM array has the capability of generating high-power microwaves with relatively low-voltage electron beams. The low-voltage operation reduces the system overhead and leads to a relatively compact device. In ...

InGaAs/GaAsSb based two-dimensional electron gases