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

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Intrinsic anomalous Hall conductivity of GaMnAs solely governed by the carrier concentration

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Title
Intrinsic anomalous Hall conductivity of GaMnAs solely governed by the carrier concentration
Author
Chun, SHKim, YSChoi, HKLee, WOSuh, KSOh, Yoon SeokKim, KHKhim, ZGPark, YD
Keywords
intrinsic anomalous Hall effect; berry phase; GaMnAs; spintronics
Issue Date
2007-03
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.310, no.2, pp.2064 - 2066
Abstract
In the core of quantum Hall effect, intrinsic anomalous Hall effect (AHE), and intrinsic spin Hall effect lies the Berry phase, a quantum mechanical phase associated with an adiabatic change of the system. However, experimental evidences supporting this new recognition are scarce in three-dimensional systems. We report here that the anomalous Hall conductivity of metallic GaMnAs samples, when properly scaled by the carrier concentration, remains constant regardless of the ferromagnetic transition temperature from 50 to 160 K. In addition, the constant agrees with the theoretical prediction quite well. These qualitative and quantitative agreements support the idea of intrinsic AHE originated from momentum-space Berry phase firmly. Furthermore, the tunability of intrinsic AHE in the diluted magnetic semiconductors can be utilized in the semiconductor spintronics applications. (c) 2006 Elsevier B.V. All rights reserved.
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DOI
10.1016/j.jmmm.2006.10.012
ISSN
0304-8853
Appears in Collections:
PHY_Journal Papers
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