Knight shifts in semiconductor nanostructures

✍ Scribed by Ionel Ţifrea

• Book ID: 104084835
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 262 KB
• Volume: 40
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/j.physe.2007.08.009

✦ Synopsis

One measurement for the nuclear spin dynamics in solid state systems is the Knight shift observed in nuclear magnetic resonance experiments. I will present a theoretical investigation of the Knight shift in samples with reduced dimensionality such as quantum wells and quantum dots. The nuclear spin dynamics is dominated by the hyperfine interaction between nuclear and electronic spins and depends on the electronic local density of states, and implicitly can be manipulated with an applied electric field. I will discuss the position and time dependence of the induced nuclear spin polarization and the resulting Knight shift in a parabolic quantum well.