University of Groningen
Spin transport in graphene-based van der Waals heterostructures
Ingla Aynés, Josep
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Publication date: 2018
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Ingla Aynés, J. (2018). Spin transport in graphene-based van der Waals heterostructures. Rijksuniversiteit Groningen.
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Acknowledgements
It has been four and a half years since the beginning of my PhD and this thesis would not be possible without the help from many people. Here I get the chance to thank you all.
Firstly, I want to thank my supervisor. Bart, thank you very much for admitting me to your group, even though when I started I didn’t have any experience in device physics. Your direct way of communicating makes discussions very dynamic and I have really enjoyed discussing data and calculations with you. Also I want to thank you for providing practical solutions to complex modelling problems. Without your simplifying ideas some of the analysis performed in this thesis would not have been possible. Your ideas on how to write the papers have also been crucial for the outcome of this thesis.
Ivan, you are an outstanding researcher. You are my co-supervisor and, even though we didn’t have much interaction, discussing with you I have learned a lot. I was sad that the pn junction project did not work and we could not collaborate for a paper.
Prof. Gerrit E. W. Bauer, thank you for your insightful comments about this the-sis, especially about the background chapters. I am also thankful for your patience explaining me the physics of drift.
Prof. F`elix Casanova, thank you for being part of my reading committee and your useful comments about the thesis. Also thank you for your hospitality during the secondment I performed in your group and for accepting me in your group to continue with my career.
Prof. Irina Grigorieva, thank you very much for your feedback on my thesis and for being part of the reading committee.
Prof. J. Fabian, thank you for your valuable inputs on the anisotropic spin trans-port in bilayer graphene paper.
Caspar, thank you very much for giving me the opportunity to be a teaching assistant in quantum physics. Your teaching skills were clearly reflected in the meet-ings, the students, and the fact that you won the teaching prize several times. The lectures were taken over in a great way by Diederik and it was a pleasure for me to teach it for another year.
Tamalika, thank you for taking care of the Wednesday meetings for so many years.
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I also want to thank Prof. Christoph Stampfer and his group in Aachen for their hospitality during my secondment there, I really enjoyed working there with your high-quality CVD graphene.
My PhD position was funded by the Spinograph consortium. That allowed me to participate in all the Spinograph events and enjoy from the interaction with all the project partners. I am very thankful to Joaqu´ın Fern´andez-Rossier for creating the Spinograph consortium and looking after us through all the process.
I am also happy to mention here all the Spinograph colleaques Mario, Wenjing, Christian Albino, Denis, Jose Sambricio, Jose Lado, Noel, Julian, Sowmya, Luis, Francesca, and Christian Leutenantsmeyer with whom we shared experiences in Braga, Groningen, Aachen, San Sebasti´an and Cambridge. It was great to be there with you.
Marcos, thank you very much for teaching me everything about graphene spin-tronics from the basic spinspin-tronics concepts to the fabrication techniques (exfoliation, pick-up, e-beam lithography...) and even how to write papers. And all of this during the last months of your PhD and first months of your postdoc in Cornell. Thank you very much for your patience.
Jasper, with your calmed and positive attitude you taught me many things, in-cluding contact evaporation and how to perform electrical measurements in the group set-ups. Thank you very much for that.
I am also very thankful to Paul and Niko. Since the beginning you have always been available to answer to any question I had and your ideas were crucial for the end of the ferromagnetic contact issues.
Christian, this thesis wouldn’t look the same without your fancy template and critical eye. We have shared a lot of fabrication pain and, by the end also worked a lot together. I am very happy that we managed to write two papers together.
Alexey, your calmed way of being and your solid physics background make you the ideal friend and person to discuss physics with. Thank you for starting the ”Fri-day project”.
Talieh, you are a great friend, collaborator, and office mate. My stay in Gronin-gen would not have been the same without you. Thanks to your pushing of the TMD/graphene anisotropy project days and nights we got a very nice paper. Also thank you for taking a careful look at my thesis.
Julian, we worked for a while together in the most challenging fabrication process I had. Thank you for pushing it with your PMMA technique and for many inputs regarding programming and graphical design. I really hope that spin transport in fully encapsulated CVD graphene will finally give some interesting results.
Rick, you were a great master student and I enjoyed a lot working with you. You learned so fast that you could prepare a lot of samples and finally also measure spin drift in spin valves and Hanles in bilayer graphene. I was honoured to give a speech for your master graduation and to be there for your best thesis award.
155 I am also thankful to the graphene team members. Mallik, Sid, Jorge, Antonio, Jantje, Madhu, Tian, Lei, Juliana, Magda, Crystal, Maikel, and the abovementioned people from the graphene team for keeping the 2D research running in our labs over all these years.
I am also thankful to Tom Bosma for translating the thesis summary to Dutch. Saurabh, I really enjoyed the times we were living together in Florakade. It was a great experience to come to Kolkata for your wedding and also the trip to Vienna was awesome.
Roald, you were a great office mate. I really enjoyed the trip to Vienna.
Nynke, thank you for all your help. Specially in the beginning of my PhD, when you helped me to find out how stuff works in FND. I still remember the bet I lost about the spice girls and the referee replies.
I also want to thank the FND members Sander, Juan, Ludo, Arijit, Xu, Timo, Olger, Eric, Geert, Carmem, Jing, Kumar, Ping, Arjan, Jakko, Joost, Fasil, Gertjan, Michael, Nilesh, Alok, and Danny for creating a nice work environment in FND.
I also want to thank our administrative and technical team: Anna, Andrea, Johan, Tom, Martijn, and Hermann. Thank you for making sure that things are working in the group and we can focus on the research.
I am also grateful for the funding agencies that allowed me to perform research: the Marie Curie initial training network Spinograph(grant agreement No 607904), the European Unions Horizon 2020 research and innovation program under grant agreement No 696656 (Graphene Flagship), and the NWO Spinoza prize awarded to Bart J. van Wees.
I also want to thank my non-FND friends Zahra, Stefan, Nikas, and Christian, and the Catalan clan members Jordi and Sergi, it was nice to find an excuse to meet every week to watch Barc¸a. Also thanks to Anna for organizing the Catalan com-munity in Groningen. I am also grateful to Manuela for being my climbing mate for almost a whole year.
Arribar fins aqu´ı no hagu´es estat possible sense el suport del papa, la mama, la padrina, la Laia i l’Adri`a. Em sap molt greu que la mama ja no hi pugui ser.
M’agradaria donar les gr`acies a la gent du lokat people, Duc, D´ıdac, Roca, Vall`es, Gerard, Xup, Oriol, Laia, Anna, Neus, S `onia i N ´uria per mantenir la flama de la Ribera encesa i per estar disponible sempre que soc pel poble per fer el beure.
Tamb´e vull donar les gr`acies als antics companys de pis Nixon, Camille, Pau, Tales i Isa i els meus companys de carrera Frede, Ruben, Victor, Sergi, Joan, Llu´ıs... Sense vosaltres els meus anys a Barcelona no haurien estat el mateix.
Josep Ingla Ayn´es, Groningen June 2018
