| Issue |
Europhys. Lett.
Volume 42, Number 2, April II 1998
|
|
|---|---|---|
| Page(s) | 197 - 202 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00230-6 | |
| Published online | 01 September 2002 | |
Skyrmion liquid phase of the quantum ferromagnet in two dimensions
Instituto de Ciencia de Materiales (CSIC ),
Universidad Autonoma de Madrid Cantoblanco, 28049 Madrid, Spain
Received:
28
January
1997
Accepted:
4
March
1998
The two-dimensional quantum ferromagnet filled with a liquid
of skyrmions is studied theoretically in the context of the quantum
Hall effect near electronic filling factor 
.
A crossover between the classical ferromagnetic phase at 
and a classical paramagnetic phase at 
is obtained,
which is consistent with recent Knight-shift measurements.
A new collective mode associated with the skyrmion liquid that is of
the cyclotron type is also identified.
PACS: 73.40.Hm – Quantum Hall effect (integer and fractional) / 75.10.Jm – Quantized spin models / 75.40.Cx – Static properties
© EDP Sciences, 1998
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