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Article Dans Une Revue Physical Review Letters Année : 2008

Soft spin wave around $\nu$=1: evidence for a magnetic instability in skyrmion systems.

Résumé

The ground state of the two dimensional electron gas near $\nu$=1 is investigated by inelastic light scattering measurements carried down to very low temperatures. Away from $\nu$=1, the ferromagnetic spin wave collapses and a new low-energy spin wave emerges below the Zeeman gap. The emergent spin wave shows soft behavior as its energy increases with temperature and reaches the Zeeman energy for temperatures above 2 K. The observed softening indicates an instability of the two dimensional electron gas towards a magnetic order that breaks spin rotational symmetry. We discuss our findings in light of the possible existence of a Skyrme crystal.
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Dates et versions

hal-00309511 , version 1 (06-08-2008)

Identifiants

  • HAL Id : hal-00309511 , version 1

Citer

Yann Gallais, Jun Yan, A. Pinczuk, L. N. Pfeiffer, K. W. West. Soft spin wave around $\nu$=1: evidence for a magnetic instability in skyrmion systems.. Physical Review Letters, 2008, 100, pp.086806. ⟨hal-00309511⟩
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