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Oh, Yoon Seok
Laboratory for Strong Correlation in Quantum Materials
Research Interests
  • Multiferroic
  • Ferroelectric
  • Quantum Magnetism

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Evidence of metallic clustering in annealed Ga1-xMnxAs from atypical scaling behavior of the anomalous Hall coefficient

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Title
Evidence of metallic clustering in annealed Ga1-xMnxAs from atypical scaling behavior of the anomalous Hall coefficient
Author
Choi, HKKim, YSSeo, SSAJeong, ITLee, WOOh, Yoon SeokKim, KHWoo, JCNoh, TWKhim, ZGPark, YDChun, SH
Keywords
SEMICONDUCTOR; FERROMAGNETISM; MN)AS; (GA; MN
Issue Date
2006-09
Publisher
AMER INST PHYSICS
Citation
APPLIED PHYSICS LETTERS, v.89, no.10, pp.102503 -
Abstract
The anomalous Hall coefficient (Rs) and longitudinal resistivity (ρxx) scaling relationship (RS=cρxxn) for a series of annealed Ga1-xMnxAs epilayers (x≈0.055) are investigated. As-grown samples exhibit a scaling parameter n∼1 and samples annealing near the optimal annealing temperature, n∼2. For annealing temperatures far above the optimum they observe scaling with n>3, which is similar to the behavior of certain inhomogeneous systems. Optical spectroscopy measurements also reveal an enhancement of the absorption coefficient in these samples for photons of energy around 1 eV. These atypical behaviors are characteristic of spherical resonance from metallic inclusions.
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DOI
10.1063/1.2344932
ISSN
0003-6951
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PHY_Journal Papers
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