發送短信 : Spin-polarized two-dimensional electron gas in undoped Mg xZn 1-xO/ZnO heterostructures

 __   __    _____                ___      _  _   
 \ \\/ //  |  ___||     ___     / _ \\   | \| || 
  \   //   | ||__      /   ||  | / \ ||  |  ' || 
  / . \\   | ||__     | [] ||  | \_/ ||  | .  || 
 /_//\_\\  |_____||    \__ ||   \___//   |_|\_|| 
 `-`  --`  `-----`      -|_||   `---`    `-` -`  
                         `-`