Nonlinear theory of fractional microwave-induced magnetoresistance oscillations in a dc-driven two-dimensional electron system

作者：Lei, X L^*

来源：Physical Review B, 2009, 79(11): 115308.

DOI：10.1103/PhysRevB.79.115308

• cyclotron resonance
• electrical resistivity
• gallium arsenide
• III-V semiconductors
• Landau levels
• magnetoresistance
• two-dimensional electron gas

Microwave-induced nonlinear magnetoresistance in a dc-driven two-dimensional electron system is examined using a multi-photon-assisted transport scheme directly controlled by the current. It is shown that near the second subharmonic of the cyclotron resonance, the frequency of the resistivity oscillation with the magnetic-field-normalized current density is double that at the cyclotron resonance and its harmonics, in excellent agreement with recent experimental findings by Hatke [Phys. Rev. Lett. 101, 246811 (2008)]. The current-induced alternative emergence of resonant two-photon and single-photon processes is responsible for this frequency doubling. Near the third subharmonic of the cyclotron resonance, the current-induced consecutive appearance of resonant 0-/3-photon, two-photon, and single-photon processes may lead to the frequency tripling of the resistivity oscillation.

• 出版日期2009-3
• 单位上海交通大学