發送短信

數:

提供者:

CAPTCHA:

 __   __    ______    _____    _    _      _____  
 \ \\/ //  /_   _//  |__  //  | || | ||   / ___// 
  \   //    -| ||-     / //   | || | ||   \___ \\ 
  / . \\    _| ||_    / //__  | \\_/ ||   /    // 
 /_//\_\\  /_____//  /_____||  \____//   /____//  
 `-`  --`  `-----`   `-----`    `---`   `-----`

Please enter what you see:

發送短信 : Source of two-dimensional electron gas in unintentionally doped AlGaN/GaN multichannel high-electron-mobility transistor heterostructures