1/f noise in GaN/AlGaN heterostructure field effect transistors under condition of strong geometric magnetoresistance

Sergey L. Rumyantsev; Michael Shur; Wojciech Knap; Nina Dyakonova; Fabien Pascal; Alain Hoffman; Y. Ghuel; C. Gaquiere; D. Theron

doi:10.1117/12.546748

25 May 2004 1/f noise in GaN/AlGaN heterostructure field effect transistors under condition of strong geometric magnetoresistance

Sergey L. Rumyantsev, Michael Shur, Wojciech Knap, Nina Dyakonova, Fabien Pascal, Alain Hoffman, Y. Ghuel, C. Gaquiere, D. Theron

Author Affiliations +

Proceedings Volume 5470, Noise in Devices and Circuits II; (2004) https://doi.org/10.1117/12.546748
Event: Second International Symposium on Fluctuations and Noise, 2004, Maspalomas, Gran Canaria Island, Spain

Abstract

The I-V characteristics of GaN/AlGaN HFET and 1/f noise at 4K have been measured in strong magnetic fields, where the electron mobility is affected by geometric magnetoresistance. The magnetic field dependence of the 1/f noise shows that the number of electrons fluctuations is the dominant mechanism of the 1/f noise and precludes the mobility fluctuations mechanism. The channel mobility extracted from the magnetoresistance data first increases with gate bias reaching the maximum value of ~(0.9-1.0) m²/Vs at the 2D electron concentration of 5x10¹² cm^-2. This maximum value is close to the estimated ballistic mobility limit of 1.2 m²/Vs determined by the electron transit time with the Fermi velocity.

Citation Download Citation

Sergey L. Rumyantsev, Michael Shur, Wojciech Knap, Nina Dyakonova, Fabien Pascal, Alain Hoffman, Y. Ghuel, C. Gaquiere, and D. Theron "1/f noise in GaN/AlGaN heterostructure field effect transistors under condition of strong geometric magnetoresistance", Proc. SPIE 5470, Noise in Devices and Circuits II, (25 May 2004); https://doi.org/10.1117/12.546748

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available