Zero-Momentum Cyclotron Spin-Flip Mode in a Spin-Unpolarized Quantum Hall System

Details Zero-Momentum Cyclotron Spin-Flip Mode in a Spin-Unpolarized Quantum Hall System Zero-Momentum Cyclotron Spin-Flip Mode in a Spin-Unpolarized Quantum Hall System

2004-11-28

arxiv.org/abs/cond-mat/0411707v3

Phys. Rev. B 71, 241310(R) (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages and 1 figure

Scientific paper

10.1103/PhysRevB.71.241310

We report on a study of the zero-momentum cyclotron spin-flip excitation in the V=2 quantum Hall regime. Using the excitonic representation the excitation energy is calculated up to the second order Coulomb corrections. A considerable negative exchange shift relative to the cyclotron gap is established for cyclotron spin-flip excitations in the the spin-unpolarized electronic system. Under these conditions this type of states presents the {\it lowest-energy} excitations. For a fixed filling factor V=2 the energy shift is independent of the magnetic field which is in agreement with recent experimental observations.

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