Electron cyclotron resonance in In1−xMnxAs

✍ Scribed by Y.H Matsuda; T Ikaida; N Miura; M.A Zudov; J Kono; H Munekata

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 140 KB
• Volume: 10
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(01)00086-8

✦ Synopsis

We have made the ÿrst observation of cyclotron resonance in In1-xMnxAs alloys. Our data unambiguously show that the e ective mass of electrons systematically decreases with increasing Mn concentration x. Using an 8-band k • p method, we demonstrate that this mass reduction is a combined e ect of (1) a decrease of the band gap and (2) an e ective reduction of the momentum matrix element P due to the sp-d hybridization. We also observed a signiÿcant mass decrease with decreasing temperature, its temperature coe cient slightly depending on x. The temperature dependent sp-d-interaction-enhanced Landau level spin splitting cannot account for this unusual temperature dependence.