# Excitation spectrum and effective mass of the even-fraction quantum hall liquid

@article{Onoda2000ExcitationSA, title={Excitation spectrum and effective mass of the even-fraction quantum hall liquid}, author={Onoda and Mizusaki and Otsuka and Aoki}, journal={Physical review letters}, year={2000}, volume={84 17}, pages={ 3942-5 } }

To probe the nature of the even-fraction quantum Hall system, we have investigated the low-lying excitation spectrum by exact diagonalization for finite systems. We have found (i) a striking one-to-one correspondence (i.e., a shell structure) between the spectrum and those for free (composite) fermions, (ii) a surprisingly straight scaling plot for the excitation energy that gives a zero gap (metal) in the thermodynamic limit, (iii) the effective mass evaluated from the scaling becoming heavier… Expand

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