4 papers
Orthogonality catastrophe in a composite fermion liquid
Darren J. T. Leonard, T. Portengen, V. Nikos Nicopoulos +1
We discuss the emergence of an orthogonality catastrophe in the response of a composite fermion liquid as the filling factor νapproaches 1/2m, where m=1,2,3.... A tunneling experim…
Optics with Quantum Hall Skyrmions
T. Portengen, J. R. Chapman, V. Nikos Nicopoulos +1
A novel type of charged excitation, known as a Skyrmion, has recently been discovered in quantum Hall systems with filling factor near ν= 1. A Skyrmion -- which can be thought of a…
Skyrmionic excitons
T. Portengen, J. R. Chapman, V. Nikos Nicopoulos +1
We investigate the properties of a Skyrmionic exciton consisting of a negatively charged Skyrmion bound to a mobile valence hole. A variational wave function is constructed which h…
Photoluminescence signature of skyrmions at ν= 1
T. Portengen, J. R. Chapman, V. Nikos Nicopoulos +1
The photoluminescence spectrum of quantized Hall states near filling factor ν= 1 is investigated theoretically. For ν>= 1 the spectrum consists of a right-circularly polarized (RCP…