QM2 - Quantum Matter and Materials | October 13, 14:00
Interlayer pairing symmetry of composite fermions in quantum Hall bilayers
Since the discovery of quantum Hall effect, two-dimensional electron system under magnetic field has provided lots of intriguing physics topics both experimentally and theoretically, including integer/fractional quantized Hall conductance, anyon statistics, and non-Abelian particles. Electron-electron interactions play crucial roles in such quantum Hall problems. Even richer phenomena take place for two parallel two-dimensional sheets. Bilayer systems, or more generally multicomponent systems, have additional degrees of freedom, and they allow interlayer paired states at even-denominator filling fraction in each layer, which exhibits the Fermi sea of composite fermions without interactions. I will discuss the interlayer paired state in the presence of the Coulomb interaction and its pairing symmetry, and will make a comment on a possible topological order of the ground state.
MIT
Seminar Room of the Institute of Physics II
Contact: Yoichi Ando