| 查看: 202 | 回复: 0 | |||
贝芷苡铜虫 (小有名气)
|
[交流]
-U
|
|
许多文献中多提到 negative U property,但是很少给出具体定义，一下为其定义 A defect has negative-U properties if it can trap two electrons (or holes) with the second bound more strongly than the first. The system can be thought of as an extrinsic Cooper pair, the defect providing an environment in which a net attraction can develop between the otherwise Coulombically repulsive carriers. Evidence previously cited for this behavior in selected liquid and solid state systems will be reviewed. Recently, the first direct and unambiguous demonstration of the phenomenon in a solid has been supplied for two simple point defects in crystalline silicon—the lattice vacancy and interstitial boron. The experiments leading to this identification are described and mechanisms for this remarkable phenomenon are discussed. 来自Advances in Solid State Physics, Advances in Solid State Physics, Volume 24. ISBN 978-3-528-08030-3. Friedr.Vieweg & Sohn Braunschweig, 1984, p. 163 |
回复此楼» 猜你喜欢
求调剂
已经有6人回复
-
085600材料与化工调剂
已经有4人回复
-
327求调剂
已经有4人回复
-
309求调剂
已经有8人回复
-
一志愿南航 335分 | 0856 | GPA 4.07 | 有科研经历
已经有8人回复
-
求化学调剂
已经有5人回复
-
085600，材料与化工321分求调剂
已经有10人回复
-
0703 化学 求调剂，一志愿山东大学 342 分
已经有5人回复
-
一志愿南开大学0710生物学359求调剂
已经有3人回复
-
085600，专业课化工原理，320分求调剂
已经有4人回复
