A simple parallel conduction extraction method (SPCEM) for MODFETs and undoped GaN-based HEMTs
MICROELECTRONICS JOURNAL, cilt.40, sa.3, ss.413-417, 2009 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 40 Sayı: 3
- Basım Tarihi: 2009
- Doi Numarası: 10.1016/j.mejo.2008.06.006
- Dergi Adı: MICROELECTRONICS JOURNAL
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.413-417
- Anahtar Kelimeler: Parallel conduction, Mixed conduction, Multi-carrier, MODFET, HEMT, QMSA, MOBILITY-SPECTRUM ANALYSIS, FIELD-EFFECT TRANSISTORS, MAGNETOTRANSPORT CHARACTERIZATION, MICROWAVE PERFORMANCE, ELECTRON-GAS, HETEROSTRUCTURES, HETEROJUNCTIONS, TRANSPORT, HGCDTE, DONORS
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Gazi Üniversitesi Adresli: Evet
Özet
We report a simple method to extract the mobility and sheet carrier densities of conduction channels in conventional modulation doped field-effect transistor (MODFET) structures and unintentionally doped GaN-based high-electron mobility transistor (HEMT) structures for a special case. Extraction of the conduction channels from the magnetic field-dependent data can present number of problems; even the most recent methods encounter great difficulties. For the GaN-based HEMT structures which have lower mobilities and larger effective masses than that of GaAs-based counterparts, these difficulties become more prominent. in this study, we describe a simple method for magnetotransport analysis to extract conduction channels successfully for a special case that is commonly encountered: one bulk channel and one two-dimensional electron gas (2DEG) channel. Advantage of this method is mainly its simplicity. The analysis can be done with only two magnetic field-dependent measurements per temperature step. The method is applied to the magnetotransport results of an unintentionally doped AlGaN/AlN/GaN/AIN heterostructure over a temperature range of 29-350 K and in a magnetic field range of 0-1.5 T (mu B < 1). The results are then compared with those obtained using a commercial package for these calculations namely: quantitative mobility spectrum analysis (QMSA). (C) 2008 Elsevier Ltd. All rights reserved.