The research in my group is primarily focused on studying transport in semiconductor nanowires of different narrow bandgap materials such as InAs, InSb, GaSb, InP and their alloys. Here we explore the electronic structure of novel crystal phases, and how these phases can be used in device structures and for transport physics.
One particular focus is quantum dots (artificial atoms) and coupled quantum dots (artificial molecules). We have developed a new method to create tunable coupled quantum dots with extremely strong confinement, which are ideal for exploring electron interactions and spin physics.
Ongoing work involves exploring Kondo physics of coupled dots, quantum ring formation and orbital enhanced g-factors, coupling to ferromagnetic and superconducting contacts
Click here to see a recorded presentation (22 min) from EMRS Fall meeting 2021 on the topic of "Quantum rings in polytypic nanowires".
Course responsible and lecturer: Processing and Device Technology (Process- och komponentteknologi) FFFF10/FYSD13. The course is given in the beginning of the fall (LP1, 7.5 HP).
Information regarding publications:
To find a complete list of published journal papers that I have authored or co-authored please visit my "Researcher ID" web page: http://www.researcherid.com/rid/H-4536-2011
(Publication metrics from Web of Science, Jan-2020: 100 publ., h-index 38, average 60 citations/publ.)
1. "Magnetic field independent sub-gap states in hybrid Rashba nanowires"
C. Jünger, R. Delagrange, D. Chevallier, S. Lehmann, K.A. Dick, C. Thelander, J. Klinovaja, D. Loss, A. Baumgartner, C. Schönenberger
Physical Review Letters 2020, https://arxiv.org/pdf/2001.07666 (2020)
2. “Imaging the thermalization of hot carriers after thermionic emission over a polytype barrier”
F. Könemann, I.J. Chen, S. Lehmann, C. Thelander, B. Gotsmann
Physical Review Applied (2020), https://arxiv.org/pdf/1911.11415 (2019)
Formation of artificial molecules based on coupled quantum dots within nanowires of InAs. https://doi.org/10.1021/acs.nanolett.7b04090
Transport spectroscopy of a nanowire double quantum dot (model and experiment). The notation indicates the 2-electron spin states that are involved in the transport. (https://doi.org/10.1103/physrevb.98.245305)
Ever wondered what happens if you couple two quantum dots in two points? No? Well we figured it out anyway, and it is pretty interesting... (https://doi.org/10.1038/s41467-019-13583-7)
Dissection of a carbon nanotube rope using an AFM with in-situ electrical feedback. https://doi.org/10.1088/0957-4484/13/1/323
Displaying of publications. Sorted by year, then title.