Strain Effects on Rashba Spin–Orbit Coupling of 2D Hole Gases in GeSn/Ge Heterostructures
Abstract
A demonstration of 2D hole gases in GeSn/Ge heterostructures with a mobility as high as 20 000 cm2 V–1 s–1 is given. Both the Shubnikov–de Haas oscillations and integer quantum Hall effect are observed, indicating high sample quality. The Rashba spin-orbit coupling (SOC) is investigated via magneto-transport. Further, a transition from weak localization to weak anti-localization is observed, which shows the tunability of the SOC strength by gating. The magneto-transport data are fitted to the Hikami–Larkin–Nagaoka formula. The phase-coherence and spin-relaxation times, as well as spin-splitting energy and Rashba coefficient of the k-cubic term, are extracted. Furthermore, the analysis reveals that the effects of strain and confinement potential at a high fraction of Sn suppress the Rashba SOC caused by the GeSn/Ge heterostructures.
- Authors:
-
[4]
- National Taiwan Univ., Taipei (Taiwan)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Academia Sinica, Taipei (Taiwan)
- National Taiwan Univ., Taipei (Taiwan); Taiwan Semiconductor Research Inst., Hsinchu (Taiwan)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1787524
- Report Number(s):
- SAND-2021-4493J
Journal ID: ISSN 0935-9648; 695519
- Grant/Contract Number:
- AC04-94AL85000; NA0003525
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Materials
- Additional Journal Information:
- Journal Volume: 33; Journal Issue: 26; Journal ID: ISSN 0935-9648
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Tai, Chia‐Tse, Chiu, Po‐Yuan, Liu, Chia‐You, Kao, Hsiang‐Shun, Harris, Charles Thomas, Lu, Tzu‐Ming, Hsieh, Chi‐Ti, Chang, Shu‐Wei, and Li, Jiun‐Yun. Strain Effects on Rashba Spin–Orbit Coupling of 2D Hole Gases in GeSn/Ge Heterostructures. United States: N. p., 2021.
Web. doi:10.1002/adma.202007862.
Tai, Chia‐Tse, Chiu, Po‐Yuan, Liu, Chia‐You, Kao, Hsiang‐Shun, Harris, Charles Thomas, Lu, Tzu‐Ming, Hsieh, Chi‐Ti, Chang, Shu‐Wei, & Li, Jiun‐Yun. Strain Effects on Rashba Spin–Orbit Coupling of 2D Hole Gases in GeSn/Ge Heterostructures. United States. https://doi.org/10.1002/adma.202007862
Tai, Chia‐Tse, Chiu, Po‐Yuan, Liu, Chia‐You, Kao, Hsiang‐Shun, Harris, Charles Thomas, Lu, Tzu‐Ming, Hsieh, Chi‐Ti, Chang, Shu‐Wei, and Li, Jiun‐Yun. Tue .
"Strain Effects on Rashba Spin–Orbit Coupling of 2D Hole Gases in GeSn/Ge Heterostructures". United States. https://doi.org/10.1002/adma.202007862. https://www.osti.gov/servlets/purl/1787524.
@article{osti_1787524,
title = {Strain Effects on Rashba Spin–Orbit Coupling of 2D Hole Gases in GeSn/Ge Heterostructures},
author = {Tai, Chia‐Tse and Chiu, Po‐Yuan and Liu, Chia‐You and Kao, Hsiang‐Shun and Harris, Charles Thomas and Lu, Tzu‐Ming and Hsieh, Chi‐Ti and Chang, Shu‐Wei and Li, Jiun‐Yun},
abstractNote = {A demonstration of 2D hole gases in GeSn/Ge heterostructures with a mobility as high as 20 000 cm2 V–1 s–1 is given. Both the Shubnikov–de Haas oscillations and integer quantum Hall effect are observed, indicating high sample quality. The Rashba spin-orbit coupling (SOC) is investigated via magneto-transport. Further, a transition from weak localization to weak anti-localization is observed, which shows the tunability of the SOC strength by gating. The magneto-transport data are fitted to the Hikami–Larkin–Nagaoka formula. The phase-coherence and spin-relaxation times, as well as spin-splitting energy and Rashba coefficient of the k-cubic term, are extracted. Furthermore, the analysis reveals that the effects of strain and confinement potential at a high fraction of Sn suppress the Rashba SOC caused by the GeSn/Ge heterostructures.},
doi = {10.1002/adma.202007862},
journal = {Advanced Materials},
number = 26,
volume = 33,
place = {United States},
year = {Tue May 25 00:00:00 EDT 2021},
month = {Tue May 25 00:00:00 EDT 2021}
}
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