Binding energy of negative trions at high magnetic fields in a CdTe quantum well

Details Binding energy of negative trions at high magnetic fields in a CdTe quantum well Binding energy of negative trions at high magnetic fields in a CdTe quantum well

2005-07-19

arxiv.org/abs/cond-mat/0507446v1

J. App. Phys. 99, 063702, (2006) and March 27, 2006 issue of Virtual Journal of Nanoscale Science & Technology

Physics

Condensed Matter

Materials Science

3 pages, 2 figures

Scientific paper

We present results of numerical calculations of electronic states of an exciton and a trion in a CdTe quantum well at magnetic fields up to 150T. The exciton state and the trion states were computed using a variational procedure. We estimated the binding energy of the trion in a singlet state with the z-component of angular momentum L_z=0, as well as the binding energy of the trion in a triplet state with L_z=-1. Recent experimental results show that even up to 44T the binding energy of negative trion in a singlet state is bigger than in a triplet state. We show that at a critical field B_c=65T the two binding energies cross and above B_c the binding energy of the trion in a triplet state is bigger than in the singlet state.

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