The charge excitations in Quantum Hall (QH) ferromagnets realized in a symmetric quantum well (QW) were studied. It was shown that easy-plane and easy-axis ferromagnetism occurs for ν = 3 and 4. Activation energy measurements revealed a striking difference between the easy-plane and easy-axis systems in the limit of zero single-particle gap.
|Journal||Physical Review Letters|
|Publication status||Published - 2001 Nov 5|
ASJC Scopus subject areas
- Physics and Astronomy(all)