Text this: Built-in electric field enhancement/retardation on intermixing

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