Many-body effects in electron spin resonance in 2D systems with Rashba spin-orbit interaction

作者：Krishtopenko S S^*

来源：Semiconductor Science and Technology, 2014, 29(8): 085005.

DOI：10.1088/0268-1242/29/8/085005

• spin resonance
• spin-orbit interaction
• many-body effects
• Larmor's theorem
• 2D system

We report effects of electron-electron (e-e) interaction on electron spin resonance (ESR) in two-dimensional (2D) systems with Rashba spin-orbit interaction (SOI). Using the Hartree-Fock approximation, we demonstrate that Rashba SOI results in non-zero many-body corrections to the ESR energy. We discover that e-e interaction in 2D systems with SOI can not only enhance the ESR energy but also lead to the ESR energy reduction. The magnitude of this effect exhibits remarkable features in a wide range of parameters relevant to experiment: it is found to be rather sensitive to the sign of g-factor and the filling factor of Landau levels.. We derive analytical expressions for many-body corrections to ESR energy and energy dispersion of spin wave excitations for the case of nu <= 2. We have found out that e-e interaction does not affect the ESR energy in the case of filling of the lowest Landau level (nu <= 1) in 2D systems with positive g-factors even at arbitrarily large values of Rashba constant. The many-body renormalization of ESR energy in the case of fractional Quantum Hall effect is also discussed.

• 出版日期2014-8