A Two-Dimensional Electron Gas as a Sensitive Detector for Time-Resolved Tunneling Measurements on Self-Assembled Quantum Dots
<p>Abstract</p> <p>A two-dimensional electron gas (2DEG) situated nearby a single layer of self-assembled quantum dots (QDs) in an inverted high electron mobility transistor (HEMT) structure is used as a detector for time-resolved tunneling measurements. We demonstrate a strong inf...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2010-01-01
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| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1007/s11671-010-9569-2 |
| _version_ | 1827842679926423552 |
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| author | Reuter Dirk Wieck Andreas Geller Martin Marquardt Bastian Lorke Axel |
| author_facet | Reuter Dirk Wieck Andreas Geller Martin Marquardt Bastian Lorke Axel |
| author_sort | Reuter Dirk |
| collection | DOAJ |
| description | <p>Abstract</p> <p>A two-dimensional electron gas (2DEG) situated nearby a single layer of self-assembled quantum dots (QDs) in an inverted high electron mobility transistor (HEMT) structure is used as a detector for time-resolved tunneling measurements. We demonstrate a strong influence of charged QDs on the conductance of the 2DEG which allows us to probe the tunneling dynamics between the 2DEG and the QDs time resolved. Measurements of hysteresis curves with different sweep times and real-time conductance measurements in combination with an boxcar-like evaluation method enables us to unambiguously identify the transients as tunneling events between the s- and p-electron QD states and the 2DEG and rule out defect-related transients.</p> |
| first_indexed | 2024-03-12T08:13:07Z |
| format | Article |
| id | doaj.art-b2024d90fa484d44bbc39de9e16bedeb |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T08:13:07Z |
| publishDate | 2010-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-b2024d90fa484d44bbc39de9e16bedeb2023-09-02T19:03:32ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2010-01-0155829833A Two-Dimensional Electron Gas as a Sensitive Detector for Time-Resolved Tunneling Measurements on Self-Assembled Quantum DotsReuter DirkWieck AndreasGeller MartinMarquardt BastianLorke Axel<p>Abstract</p> <p>A two-dimensional electron gas (2DEG) situated nearby a single layer of self-assembled quantum dots (QDs) in an inverted high electron mobility transistor (HEMT) structure is used as a detector for time-resolved tunneling measurements. We demonstrate a strong influence of charged QDs on the conductance of the 2DEG which allows us to probe the tunneling dynamics between the 2DEG and the QDs time resolved. Measurements of hysteresis curves with different sweep times and real-time conductance measurements in combination with an boxcar-like evaluation method enables us to unambiguously identify the transients as tunneling events between the s- and p-electron QD states and the 2DEG and rule out defect-related transients.</p>http://dx.doi.org/10.1007/s11671-010-9569-2III–V semiconductorsIndium compoundsSelf-assemblySemiconductor quantum dotsTunnelingTwo-dimensional electron gas |
| spellingShingle | Reuter Dirk Wieck Andreas Geller Martin Marquardt Bastian Lorke Axel A Two-Dimensional Electron Gas as a Sensitive Detector for Time-Resolved Tunneling Measurements on Self-Assembled Quantum Dots Nanoscale Research Letters III–V semiconductors Indium compounds Self-assembly Semiconductor quantum dots Tunneling Two-dimensional electron gas |
| title | A Two-Dimensional Electron Gas as a Sensitive Detector for Time-Resolved Tunneling Measurements on Self-Assembled Quantum Dots |
| title_full | A Two-Dimensional Electron Gas as a Sensitive Detector for Time-Resolved Tunneling Measurements on Self-Assembled Quantum Dots |
| title_fullStr | A Two-Dimensional Electron Gas as a Sensitive Detector for Time-Resolved Tunneling Measurements on Self-Assembled Quantum Dots |
| title_full_unstemmed | A Two-Dimensional Electron Gas as a Sensitive Detector for Time-Resolved Tunneling Measurements on Self-Assembled Quantum Dots |
| title_short | A Two-Dimensional Electron Gas as a Sensitive Detector for Time-Resolved Tunneling Measurements on Self-Assembled Quantum Dots |
| title_sort | two dimensional electron gas as a sensitive detector for time resolved tunneling measurements on self assembled quantum dots |
| topic | III–V semiconductors Indium compounds Self-assembly Semiconductor quantum dots Tunneling Two-dimensional electron gas |
| url | http://dx.doi.org/10.1007/s11671-010-9569-2 |
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