Wigner crystallization about ν=3

• Published in: Physica. E, Low-dimensional systems & nanostructures Vol. 22; no. 1; pp. 104 - 107
• Main Authors: Lewis, R.M., Chen, Yong, Engel, L.W., Tsui, D.C., Ye, P.D., Pfeiffer, L.N., West, K.W.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-04-2004
• Subjects: Integer Quantum Hall Wigner Crystal (IQHNC); Microwave resonance; Two dimensional electron system; Microwave resonance; Two dimensional electron system; 73.21.−b; 73.20.−r; Integer Quantum Hall Wigner Crystal (IQHNC); 73.43.−f
• ISSN: 1386-9477; 1873-1759
• DOI: 10.1016/j.physe.2003.11.226

We measure a resonance in the frequency dependence of the real diagonal conductivity, Re[
σ
xx
], near integer filling factor,
ν=3. This resonance depends strongly on
ν, with peak frequency
f
pk
≈1.7
GHz
at
ν=3.04 or 2.92 close to integer
ν, but
f
pk
≈600
MHz
at
ν=3.19 or 2.82, the extremes of where the resonance is visible. The dependence of
f
pk upon
n
∗
, the density of electrons in the partially filled level, is discussed and compared with similar measurements by Chen et al. (Phys. Rev. Lett., 91, 016801) about
ν=1 and 2. We interpret the resonance as due to a pinned Wigner crystal phase with density
n
∗
about the
ν=3 state.