Anomalous thermoelectric properties in double quantum dots coupled with Majorana bound states
We discuss the transport properties of thermal electrons in double quantum dots that are coupled with Majorana bound states (MBSs) corresponding to two model systems with T-type structure and series connection structure. It has been found that the thermoelectric figure of merit ZT in these model sys...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2016-12-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4972261 |
| _version_ | 1819054240823246848 |
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| author | Yi-Jie Zheng Juntao Song Yu-Xian Li |
| author_facet | Yi-Jie Zheng Juntao Song Yu-Xian Li |
| author_sort | Yi-Jie Zheng |
| collection | DOAJ |
| description | We discuss the transport properties of thermal electrons in double quantum dots that are coupled with Majorana bound states (MBSs) corresponding to two model systems with T-type structure and series connection structure. It has been found that the thermoelectric figure of merit ZT in these model systems is suppressed when we consider the effects of the Majorana bound states. Here, ZT=GS2Tκ, where G is the electric conductance, S is the thermopower, T is the temperature and κ is the thermal conductance. The sign of the thermopower S changes from negative to positive when the energy levels of the quantum dots are less than μ while the sign of the thermopower S changes from positive to negative when the energy levels of the quantum dots are above μ in the model system of T-type structure, where μ is the chemical potential. As a result, the figure of merit ZT first decreases and then increases as the temperature kBT increases. This behavior is different from what is seen in the general quantum dot structure without MBSs. It is interesting to show that in the series connection structure, the thermopower S and ZT are robustness and do not vary with changes in εM when |εd|<λ, even if κ changes with εM. |
| first_indexed | 2024-12-21T12:48:29Z |
| format | Article |
| id | doaj.art-569dbd0d8ac84e82886030330d2169b1 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-21T12:48:29Z |
| publishDate | 2016-12-01 |
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| record_format | Article |
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| spelling | doaj.art-569dbd0d8ac84e82886030330d2169b12022-12-21T19:03:33ZengAIP Publishing LLCAIP Advances2158-32262016-12-01612125032125032-910.1063/1.4972261035612ADVAnomalous thermoelectric properties in double quantum dots coupled with Majorana bound statesYi-Jie Zheng0Juntao Song1Yu-Xian Li2College of Physics and Information Engineering and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050024, People’s Republic of ChinaCollege of Physics and Information Engineering and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050024, People’s Republic of ChinaCollege of Physics and Information Engineering and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050024, People’s Republic of ChinaWe discuss the transport properties of thermal electrons in double quantum dots that are coupled with Majorana bound states (MBSs) corresponding to two model systems with T-type structure and series connection structure. It has been found that the thermoelectric figure of merit ZT in these model systems is suppressed when we consider the effects of the Majorana bound states. Here, ZT=GS2Tκ, where G is the electric conductance, S is the thermopower, T is the temperature and κ is the thermal conductance. The sign of the thermopower S changes from negative to positive when the energy levels of the quantum dots are less than μ while the sign of the thermopower S changes from positive to negative when the energy levels of the quantum dots are above μ in the model system of T-type structure, where μ is the chemical potential. As a result, the figure of merit ZT first decreases and then increases as the temperature kBT increases. This behavior is different from what is seen in the general quantum dot structure without MBSs. It is interesting to show that in the series connection structure, the thermopower S and ZT are robustness and do not vary with changes in εM when |εd|<λ, even if κ changes with εM.http://dx.doi.org/10.1063/1.4972261 |
| spellingShingle | Yi-Jie Zheng Juntao Song Yu-Xian Li Anomalous thermoelectric properties in double quantum dots coupled with Majorana bound states AIP Advances |
| title | Anomalous thermoelectric properties in double quantum dots coupled with Majorana bound states |
| title_full | Anomalous thermoelectric properties in double quantum dots coupled with Majorana bound states |
| title_fullStr | Anomalous thermoelectric properties in double quantum dots coupled with Majorana bound states |
| title_full_unstemmed | Anomalous thermoelectric properties in double quantum dots coupled with Majorana bound states |
| title_short | Anomalous thermoelectric properties in double quantum dots coupled with Majorana bound states |
| title_sort | anomalous thermoelectric properties in double quantum dots coupled with majorana bound states |
| url | http://dx.doi.org/10.1063/1.4972261 |
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