Search results

29,458 records were found.

We report interlayer tunneling measurements between very dilute two-dimensional GaAs hole layers. Surprisingly, the shape and temperature-dependence of the tunneling spectrum can be explained with a Fermi liquid-based tunneling model, but the peak amplitude is much larger than expected from the available hole band parameters. Data as a function of parallel magnetic field reveal additional anomalous features, including a recurrence of a zero-bias tunneling peak at very large fields. In a perpendicular magnetic field, we observe a robust and narrow tunneling peak at total filling factor $\nu_T=1$, signaling the formation of a bilayer quantum Hall ferromagnet.
Comment: 7 pages, 6 figures. Revised version has extended the numerical data with some modified conclusions
Comment: 3 pages, 2 figures. Accepted in Applied Physics Letters
Comment: 3 figures, accepted for publication in Phys. Rev. Lett
Comment: 19 pages, 4 figures, review article to appear in a book on semiconductor quantum bits, edited by O. Benson and F. Henneberger, published by Pan Stanford Publishing
Want to know more?If you want to know more about this cutting edge product, or schedule a demonstration on your own organisation, please feel free to contact us or read the available documentation at http://www.keep.pt/produtos/retrievo/?lang=en