Double subband occupation of the two-dimensional electron gas in InxAl1-xN/AlN/GaN/AlN heterostructures with a low indium content (0.064 <= x <= 0.140) barrier

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LİŞESİVDİN S. B., Tasli P., Kasap M., Ozturk M., Arslan E., Ozcelik S., ...Daha Fazla

THIN SOLID FILMS, cilt.518, sa.19, ss.5572-5575, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 518 Sayı: 19
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1016/j.tsf.2010.04.120
  • Dergi Adı: THIN SOLID FILMS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.5572-5575
  • Gazi Üniversitesi Adresli: Evet

Özet

We present a carrier transport study on low indium content (0.064 <= x <= 0.140) InxAl1-xN/AlN/GaN/AlN heterostructures. Experimental Hall data were carried out as a function of temperature (33-300 K) and a magnetic field (0-1.4 T). A two-dimensional electron gas (2DEG) with single or double subbands and a two-dimensional hole gas were extracted after implementing quantitative mobility spectrum analysis on the magnetic field dependent Hall data. The mobility of the lowest subband of 2DEG was found to be lower than the mobility of the second subband. This behavior is explained by way of interface related scattering mechanisms, and the results are supported with a one-dimensional self-consistent solution of non-linear Schrodinger-Poisson equations. (C) 2010 Elsevier B.V. All rights reserved.