Magnetospectroscopy of shallow donors in two dimensions in the presence of fluctuations of the electrostatic potential

Abstract: Spectroscopy of shallow donors is a tool to test theoretical models and to reveal properties of semiconductors. In this work we consider intra-shallow impurity transitions by studying a CdTe/(Cd, Mg) Te structure grown by a molecular beam epitaxy in which both a CdTe quantum well and (Cd, Mg) Te barries are uniformly doped with iodine donors. Measurements of a photocurrent (PC) at the far-infrared were carried out at 4.2 K and magnetic fields B up to 7 T with the energy of photons originated from a molecular laser in the range 2.2 meV–12.8 meV. Spectra (a PC signal vs. B, at a constant energy of photons) show lines which position does not depend on the photon energy but shifts with the in-plane electric field. These dependencies, which do not follow a well-established picture of shallow donor magnetospectroscopy in quantum wells, are explained within a model which unifies the role of fluctuations of the electrostatic potential and a magnetic-field induced electron localization.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Magnetospectroscopy of shallow donors in two dimensions in the presence of fluctuations of the electrostatic potential ; volume:13 ; number:10 ; year:2024 ; pages:1873-1882 ; extent:10 ; Nanophotonics ; 13, Heft 10 (2024), 1873-1882 (gesamt 10)

Contributors, Places and Time

• Creator: Karpierz, Krzysztof ; Szot, Michał ; Wojtowicz, Tomasz ; Łusakowski, Jerzy

Further information

• DOI: 10.1515/nanoph-2023-0689
• URN: urn:nbn:de:101:1-2404271541554.635327447657
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 14.08.2025, 11:01 AM CEST