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Transport Studies on Two-subband-populated AlGaN/GaN Heterostructures

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Abstract

We report an investigation of electronic properties of two-dimensional electron gas (2DEG) confined at AlGaN/GaN heterostructures by magnetotransport measurements. The second-subband population is manifested by the multi-frequency in the Shubnikov-de Haas (SdH) oscillations. The modulated patterns of SdH oscillations which are due to the two-subband occupancy can be drastically enhanced by employing the microwave modulation technique. This unique advantage enables us to provide direct experimental evidence that the 2DEG in the second subband has a higher mobility than that in the first subband in the modulation-doped Al0.22Ga0.78N/GaN heterostructures by means of microwave-modulated magnetotransport measurements. The carrier concentrations and 2DEG Fermi energy for each subband were determined. It was found that the second-subband population ratio increases with spacer thickness up to 5 nm, while the subband separation decreases.

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References

  1. T. Y. Lin, H. M. Chen, M. S. Tsai, Y. F. Chen, F. F. Fang, C. F. Lin, and G. C. Chi, Phys. Rev. B 58, 13793 (1998).

    Article  CAS  Google Scholar 

  2. D. R. Hang, C. -T. Liang, C. F. Huang, Y. H. Chang, Y. F. Chen, H. X. Jiang, and J. Y. Lin, Appl. Phys. Lett. 79, 66 (2001).

    Article  CAS  Google Scholar 

  3. J. A. Garrido, J. L. Sánchez-Rojas, A. Jiménez, E. Muñoz, F. Omnes, and P. Gibart, Appl. Phys. Lett. 75, 2407 (1999).

    Article  CAS  Google Scholar 

  4. D. R. Hang, C. H. Chen, Y. F. Chen, H. X. Jiang, and J. Y. Lin , J. Appl. Phys. 90, 1887 (2001).

    Article  CAS  Google Scholar 

  5. J. P. Bergman, T. Lundstöm, B. Monemar, H. Amano, and I. Akasaki, Appl. Phys. Lett. 69, 3456 (1996).

    Article  CAS  Google Scholar 

  6. S. R. Kurtz, A. A. Allerman, D. D. Koleske, and G. M. Peake, Appl. Phys. Lett. 80, 4549 (2002).

    Article  CAS  Google Scholar 

  7. C. Y. Fang, C. F. Lin, E. Y. Chang, and M. S. Feng, Appl. Phys. Lett. 80, 4558 (2002).

    Article  CAS  Google Scholar 

  8. Z.-F. Li, W. Lu, S. C. Shen, S. Holland, C. M. Hu, D. Heitmann, B. Shen, Y. D. Zheng, T. Someya, and Y. Arakawa, Appl. Phys. Lett. 80, 431 (2002).

    Article  CAS  Google Scholar 

  9. Z. W. Zheng, B. Shen, R. Zhang, Y. S. Gui, C. P. Jiang, Z. X. Ma, G. Z. Zheng, S. L. Guo, Y. Shi, P. Han, Y. D. Zheng, T. Someya, and Y. Arakawa, Phys. Rev. B 62, R7739 (2000).

    Article  CAS  Google Scholar 

  10. D. R. Hang, C. -T. Liang, J. -R. Juang, T. -Y. Huang, W. K. Hung, Y. F. Chen, G. -H. Kim, Jae-Hoon Lee and Jung-Hee Lee, J. Appl. Phys. revised.

  11. A. Saxler, P. Debray, R. Perrin, S. Elhamri, W. C. Mitchel, C. R. Elsass, I. P. Smorchkova, B. Heying, E. Haus, P. Fini, J. P. Ibbetson, S. Keller, P. M. Petroff, S. P. DenBaars, U. K. Mishra, and J. S. Speck, J. Appl. Phys. 87, 369 (2000).

    Article  CAS  Google Scholar 

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Authors and Affiliations

  1. Department of Physics, National Taiwan University, 106, Taipei, Taiwan, Republic of China

    D. R. Hang, C. F. Huang & Y. F. Chen

  2. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, 210093, Nanjing, China

    B. Shen

Authors
  1. D. R. Hang
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  2. C. F. Huang
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  3. Y. F. Chen
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  4. B. Shen
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Hang, D.R., Huang, C.F., Chen, Y.F. et al. Transport Studies on Two-subband-populated AlGaN/GaN Heterostructures. MRS Online Proceedings Library 743, 1147 (2002). https://doi.org/10.1557/PROC-743-L11.47

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  • DOI: https://doi.org/10.1557/PROC-743-L11.47

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