Doubly enhanced skyrmions in nu=2 bilayer quantum Hall states

Authors
Kumada, N Sawada, A Ezawa, ZF Nagahama, S Azuhata, H Muraki, K Saku, T Hirayama, Y
Citation
N. Kumada et al., Doubly enhanced skyrmions in nu=2 bilayer quantum Hall states, J PHYS JPN, 69(10), 2000, pp. 3178-3181
Citations number
28
Categorie Soggetti
Physics
Journal title
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
ISSN journal
00319015 → ACNP
Volume
69
Issue
10
Year of publication
2000
Pages
3178 - 3181
Database
ISI
SICI code
0031-9015(200010)69:10<3178:DESINB>2.0.ZU;2-I
Abstract
Skyrmion excitations were measured and compared for the first time in the b ilayer quantum Hall (QH) state at the Landau-level filling factor nu = 2 an d in the monolayer QH state at nu = 1. The observed number of flipped spins , N-spin, is 14 in the bilayer sample with a large tunnelling gap, and N-sp in = 7 in the bilayer sample with a small tunnelling gap, while it is N-spi n = 7 in the monolayer sample. The difference is interpreted to be due to t he interlayer exchange interaction.