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Extremely high room-temperature two-dimensional hole gas mobility in Ge/Si0.33Ge0.67/Si(001) p-type modulation-doped heterostructures
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Myranov, Maksym, Irisawa, T., Mironov, Oleg A., Koh, S., Shiraki, Y., Whall, Terry E. and Parker, Evan H. C.. (2002) Extremely high room-temperature two-dimensional hole gas mobility in Ge/Si0.33Ge0.67/Si(001) p-type modulation-doped heterostructures. Applied Physics Letters, Vol.80 (No.17). pp. 3117-3119. ISSN 0003-6951
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Official URL: http://dx.doi.org/10.1063/1.1473690
Abstract
To extract the room-temperature drift mobility and sheet carrier density of two-dimensional hole gas (2DHG) that form in Ge strained channels of various thicknesses in Ge/Si0.33Ge0.67/Si(001) p-type modulation-doped heterostructures, the magnetic field dependences of the magnetoresistance and Hall resistance at temperature of 295 K were measured and the technique of maximum entropy mobility spectrum analysis was applied. This technique allows a unique determination of mobility and sheet carrier density of each group of carriers present in parallel conducting multilayers semiconductor heterostructures. Extremely high room-temperature drift mobility (at sheet carrier density) of 2DHG 2940 cm2 V–1 s–1 (5.11×1011 cm–2) was obtained in a sample with a 20 nm thick Ge strained channel.
| Item Type: | Journal Article |
|---|---|
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering Q Science > QC Physics |
| Divisions: | Faculty of Science > Physics |
| Library of Congress Subject Headings (LCSH): | Germanium alloys, Silicon alloys, Semiconductors -- Junctions, Hall effect, Modulation-doped field-effect transistors |
| Journal or Publication Title: | Applied Physics Letters |
| Publisher: | American Institute of Physics |
| ISSN: | 0003-6951 |
| Date: | 29 April 2002 |
| Volume: | Vol.80 |
| Number: | No.17 |
| Page Range: | pp. 3117-3119 |
| Identification Number: | 10.1063/1.1473690 |
| Status: | Peer Reviewed |
| Access rights to Published version: | Open Access |
| Funder: | Japan. Monbu Kagakushō [Japan. Ministry of Education, Culture, Sports, Science and Technology] (MK), Nihon Gakujutsu Shinkōkai [Japan Society for the Promotion of Science] (NGS) |
| Grant number: | 11232202 (MK) |
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| URI: | http://wrap.warwick.ac.uk/id/eprint/992 |
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