Volume 84, Number 3, November 2008
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||29 October 2008|
Spontaneous Quantum Hall Effect in chiral d-density waves
Department of Physics, National Technical University of Athens - GR-15780 Athens, Greece, EU
Accepted: 22 September 2008
We study the electromagnetic response of a chiral dxy + id density wave state. Due to parity () and time reversal () violation, Chern-Simons terms emerge in the effective action of the gauge field. As a consequence, electric and magnetic fields are coupled providing the possibility of observing the Spontaneous Quantum Hall Effect, i.e. the generation of Hall voltage via the sole application of an electric field. We demonstrate how the Chern-Simons terms are induced and discuss the topological origin of the quantization of the Hall conductance.
PACS: 73.43.-f – Quantum Hall effects / 71.27.+a – Strongly correlated electron systems; heavy fermions / 71.45.Lr – Charge-density-wave systems
© EPLA, 2008
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