Alava, Y Ashlea;
Kumar, K;
Harsas, C;
Mehta, P;
Hathi, P;
Chen, C;
Ritchie, DA;
(2024)
Simultaneous study of acoustic and optic phonon scattering of electrons
and holes in undoped GaAs/AlxGa1−xAs heterostructures.
Applied Physics Letters
, 125
(25)
, Article 252105. 10.1063/5.0234082.
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Abstract
The study of phonon coupling in doped semiconductors via electrical transport measurements is challenging due to unwanted temperature-induced effects such as dopant ionization and parallel conduction. Here, we study phonon scattering in 2D electrons and holes in the 1.6–92.5 K range without the use of extrinsic doping, where both acoustic and longitudinal optic (LO) phonons come into effect. We use undoped GaAs/AlxGa1−xAs heterostructures and examine the temperature dependence of the sample resistivity, extracting phonon coupling constants and the LO activation energy. Our results are consistent with results obtained through approaches other than transport measurements and highlight the benefit of this approach for studying electron–phonon and hole–phonon coupling.
| Type: | Article |
|---|---|
| Title: | Simultaneous study of acoustic and optic phonon scattering of electrons and holes in undoped GaAs/AlxGa1−xAs heterostructures |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/5.0234082 |
| Publisher version: | https://doi.org/10.1063/5.0234082 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10205994 |
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