Thermoelectric Characterization of Electronic Properties of GaMnAs Nanowires
Nanowires with magnetic doping centers are an exciting candidate for the study of spin physics and proof-of-principle spintronics devices. The required heavy doping can be expected to have a significant impact on the nanowires' electron transport properties. Here, we use thermopower and conduct...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Journal of Nanotechnology |
| Online Access: | http://dx.doi.org/10.1155/2012/480813 |
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| author | Phillip M. Wu Waldomiro Paschoal Sandeep Kumar Christian Borschel Carsten Ronning Carlo M. Canali Lars Samuelson Håkan Pettersson Heiner Linke |
| author_facet | Phillip M. Wu Waldomiro Paschoal Sandeep Kumar Christian Borschel Carsten Ronning Carlo M. Canali Lars Samuelson Håkan Pettersson Heiner Linke |
| author_sort | Phillip M. Wu |
| collection | DOAJ |
| description | Nanowires with magnetic doping centers are an exciting candidate for the study of spin physics and proof-of-principle spintronics devices. The required heavy doping can be expected to have a significant impact on the nanowires' electron transport properties. Here, we use thermopower and conductance measurements for transport characterization of Ga0.95Mn0.05As nanowires over a broad temperature range. We determine the carrier type (holes) and concentration and find a sharp increase of the thermopower below temperatures of 120 K that can be qualitatively described by a hopping conduction model. However, the unusually large thermopower suggests that additional mechanisms must be considered as well. |
| format | Article |
| id | doaj-art-005e1d4ba98243738ff1eda071f8c35c |
| institution | Kabale University |
| issn | 1687-9503 1687-9511 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Nanotechnology |
| spelling | doaj-art-005e1d4ba98243738ff1eda071f8c35c2025-02-03T05:59:04ZengWileyJournal of Nanotechnology1687-95031687-95112012-01-01201210.1155/2012/480813480813Thermoelectric Characterization of Electronic Properties of GaMnAs NanowiresPhillip M. Wu0Waldomiro Paschoal1Sandeep Kumar2Christian Borschel3Carsten Ronning4Carlo M. Canali5Lars Samuelson6Håkan Pettersson7Heiner Linke8Division of Solid State Physics and The Nanometer Structure Consortium (nmC@LU), Lund University, P.O. Box 118, 221 00 Lund, SwedenDivision of Solid State Physics and The Nanometer Structure Consortium (nmC@LU), Lund University, P.O. Box 118, 221 00 Lund, SwedenDivision of Solid State Physics and The Nanometer Structure Consortium (nmC@LU), Lund University, P.O. Box 118, 221 00 Lund, SwedenInstitute for Solid State Physics, Jena University, Max-Wien-Platz 1, 07743 Jena, GermanyInstitute for Solid State Physics, Jena University, Max-Wien-Platz 1, 07743 Jena, GermanyDivision of Physics, School of Computer Science, Physics and Mathematics, Linnæus University, 39233 Kalmar, SwedenDivision of Solid State Physics and The Nanometer Structure Consortium (nmC@LU), Lund University, P.O. Box 118, 221 00 Lund, SwedenDivision of Solid State Physics and The Nanometer Structure Consortium (nmC@LU), Lund University, P.O. Box 118, 221 00 Lund, SwedenDivision of Solid State Physics and The Nanometer Structure Consortium (nmC@LU), Lund University, P.O. Box 118, 221 00 Lund, SwedenNanowires with magnetic doping centers are an exciting candidate for the study of spin physics and proof-of-principle spintronics devices. The required heavy doping can be expected to have a significant impact on the nanowires' electron transport properties. Here, we use thermopower and conductance measurements for transport characterization of Ga0.95Mn0.05As nanowires over a broad temperature range. We determine the carrier type (holes) and concentration and find a sharp increase of the thermopower below temperatures of 120 K that can be qualitatively described by a hopping conduction model. However, the unusually large thermopower suggests that additional mechanisms must be considered as well.http://dx.doi.org/10.1155/2012/480813 |
| spellingShingle | Phillip M. Wu Waldomiro Paschoal Sandeep Kumar Christian Borschel Carsten Ronning Carlo M. Canali Lars Samuelson Håkan Pettersson Heiner Linke Thermoelectric Characterization of Electronic Properties of GaMnAs Nanowires Journal of Nanotechnology |
| title | Thermoelectric Characterization of Electronic Properties of GaMnAs Nanowires |
| title_full | Thermoelectric Characterization of Electronic Properties of GaMnAs Nanowires |
| title_fullStr | Thermoelectric Characterization of Electronic Properties of GaMnAs Nanowires |
| title_full_unstemmed | Thermoelectric Characterization of Electronic Properties of GaMnAs Nanowires |
| title_short | Thermoelectric Characterization of Electronic Properties of GaMnAs Nanowires |
| title_sort | thermoelectric characterization of electronic properties of gamnas nanowires |
| url | http://dx.doi.org/10.1155/2012/480813 |
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