Far-infrared excitations below the Kohn mode: Internal motion in a quantum dot

Roman Krahne, Vidar Gudmundsson, Christian Heyn, Detlef Heitmann

Rannsóknarafurð: Framlag til fræðitímaritsGreinritrýni

22 Tilvitnanir (Scopus)

Útdráttur

We have investigated the far-infrared response of quantum dots in modulation doped GaAs heterostructures. We observe modes at frequencies below the center-of-mass Kohn mode. Comparison with Hartree-random-phase-approximation calculations show that these modes arise from the flattened potential in our field-effect confined quantum dots. They reflect pronounced relative motion of the charge density with respect to the center of mass.

Upprunalegt tungumálEnska
FræðitímaritPhysical Review B - Condensed Matter and Materials Physics
Bindi63
Númer tölublaðs19
DOI
ÚtgáfustaðaÚtgefið - 9 apr. 2001

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