Thermal gating of charge currents with Coulomb coupled quantum dots

Please always quote using this URN: urn:nbn:de:bvb:20-opus-145196
  • We have observed thermal gating, i.e. electrostatic gating induced by hot electrons. The effect occurs in a device consisting of two capacitively coupled quantum dots. The double dot system is coupled to a hot electron reservoir on one side (QD1), while the conductance of the second dot (QD2) is monitored. When a bias across QD2 is applied we observe a current which is strongly dependent on the temperature of the heat reservoir. This current can be either enhanced or suppressed, depending on the relative energetic alignment of the QD levels.We have observed thermal gating, i.e. electrostatic gating induced by hot electrons. The effect occurs in a device consisting of two capacitively coupled quantum dots. The double dot system is coupled to a hot electron reservoir on one side (QD1), while the conductance of the second dot (QD2) is monitored. When a bias across QD2 is applied we observe a current which is strongly dependent on the temperature of the heat reservoir. This current can be either enhanced or suppressed, depending on the relative energetic alignment of the QD levels. Thus, the system can be used to control a charge current by hot electrons.show moreshow less

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Metadaten
Author: H Thierschmann, F Arnold, M Mittermüller, L Maier, C Heyn, W Hansen, H Buhmann, L W Molenkamp
URN:urn:nbn:de:bvb:20-opus-145196
Document Type:Journal article
Faculties:Fakultät für Physik und Astronomie / Physikalisches Institut
Language:English
Parent Title (English):New Journal of Physics
Year of Completion:2015
Volume:17
Issue:113003
Source:New Journal of Physics 17:113003 (2015). DOI: 10.1088/1367-2630/17/11/113003
DOI:https://doi.org/10.1088/1367-2630/17/11/113003
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Tag:Coulomb interaction; energy; oscillations; physics; quantum dot systems; thermal gating; thermoelectrics; thermopower; three terminal device
Release Date:2018/11/06
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung