| | |  | | | | Record from Web of Science® | | | | | | |
| Room-temperature spin memory in two-dimensional electron gases |
|
|
| Author(s): Kikkawa JM, Smorchkova IP, Samarth N, Awschalom DD |
| Source: SCIENCE Volume: 277 Issue: 5330 Pages: 1284-1287 Published: AUG 29 1997 |
| Times Cited: 374 References: 20 |
| Abstract: Time-resolved Kerr reflectivity of two-dimensional electron gases in Il-VI semiconductors provides a direct measure of electron spin precession and relaxation over a temperature range from 4 to 300 kelvin. The introduction of n-type dopants increases the electronic spin lifetimes several orders of magnitude relative to insulating counterparts, a trend that is also observed in doped bulk semiconductors. Because the electronic spin polarization in these systems survives for nanoseconds, far longer than the electron-hole recombination lifetime, this technique reveals thousands of spin precession cycles of 15 gigahertz per tesla within an electron gas. Remarkably, these spin beats are only weakly temperature dependent and persist to room temperature. |
| Document Type: Article |
| Language: English |
Addresses:
1. UNIV CALIF SANTA BARBARA, DEPT PHYS, SANTA BARBARA, CA 93106 USA
2. PENN STATE UNIV, DEPT PHYS, UNIVERSITY PK, PA 16802 USA |
| Publisher: AMER ASSOC ADVANCEMENT SCIENCE, 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 |
| Subject Category: Multidisciplinary Sciences |
| IDS Number: XT827 |
| ISSN: 0036-8075 |
|
| | | | | | | | | Record from Web of Science® | | | | | | | | | |