Electron and Spin Correlation in Nano Carbon-Metal Hybrids

Advancements in the first year of the project

The project started in Juli 2015. Right from the beginning my Postdoc Hidetsugu Shiozawa started working on this project with me. Although the project was running only six month we already obtained very important projec related results regarding the magnetic properties of filled nanotubes [1] and regarding the interaction of graphene on semiconducting Ge substrates [2]. Both results have been published in Scientific Reports [1,2]. These results have been also presented as one invited talks at the NT15 conference in Nagoya as well as the Fullerene Nanotube Graphene Symposium in Kitakyushu Fukuoka Japan (presented by Thomas Pichler and Hidetsugu Shiozawa).

[1] Hidetsugu Shiozawa, Antonio Briones-Leon, Oleg Domanov, Georg Zechner, Yuta Sato,Kazu Suenaga, Takeshi Saito, Michael Eisterer, Eugen Weschke, Wolfgang Lang,Herwig Peterlik & Thomas Pichler; Nickel clusters embedded in carbon nanotubes as high performance magnets; Scientific Reports | 5:15033 | DOI: 10.1038/srep15033, Published: 13 October 2015

[2] N. I. Verbitskiy, A.V. Fedorov, G. Profeta, A. Stroppa, L. Petaccia, B. Senkovskiy, A. Nefedov, Ch. Wöll, D.Yu. Usachov, D.V. Vyalikh, L.V. Yashina, A.A. Eliseev, T. Pichler,  and A. Grüneis; Atomically precise semiconducto – graphene and hBN interfaces by Ge intercalationScientific Reports | 5:17700 | DOI: 10.1038/srep17700, Published: 7 December 2015 

Advancements in the second year of the project

In 2016 the project went in different aspects regarding the progress of the tasks on track and in several additional points regarding spectroscopic analysis even ahead of schedule. This is highlighted by the 5 reference publications listed below. In detail we were able to use modern high resolution electron energy loss spectroscopy to directly correlate the local structure of single walled carbon nanotubes to their electronic transport and optical properties. This can be seen as a breakthrough as it allows for the first time to for instance directly access the extension of excitons and to study the charge localization at defects [1].   In addition we also had progress in understanding the growth dynamics of inner tubes in cobaltocene filled nanotubes [2]  and in understanding how vacancy oxidation influences the properties of metallicity sorted carbon nanotubes [3]. Regarding 2D materials we had important contributions regarding understanding of n-type doped graphene [4,5]. In this respect it is especially important to understand the influence of the environment on the doping level and the electron phonon coupling. For Ba doping we could even show how to tailor the electron-phonon coupling via the environment [5]
These results have been also presented in part in 7 invited talks at 5 international conferences,  (NT16 -Seventeenth International Conference on the Science and Application of Nanotubes and Low-dimensional Materials in Vienna; IWEPNM 2016 - International Winterschool on Electronic Properties of Novel Materials in Kirchberg; XXV International Materials Research Congress/MRS Materials Research Society in Mexico; 7th Szeged International Workshop on Advances in Nanoscience - SIWAN in Hungary; CNT25 - International Symbosium on Carbon Nanotubes/Tokyo Institute of Technology, Japan)

[1] Electron Spectroscopy of Single Quantum Objects To Directly Correlate the Local Structure to Their Electronic Transport and Optical Properties. / Senga, Ryosuke; Pichler, Thomas; Suenaga, Kazu (Korresp. AutorIn).
in: Nano Letters: a journal dedicated to nanoscience and nanotechnology, Band 16, Nr. 6, 06.2016, S. 3661-3667.
[2] Growth dynamics of inner tubes inside cobaltocene-filled single-walled carbon nanotubes. / Kharlamova, M. V. (Korresp. AutorIn); Kramberger, Christian; Saito, Takeshi; Shiozawa, Hidetsugu;  Pichler, Thomas.
in: Applied Physics A: materials science & processing, Band 122, Nr. 8, 749, 01.08.2016.
[3] Disentangling Vacancy Oxidation on Metallicity-Sorted Carbon Nanotubes. / Mowbray, Duncan J. (Korresp. AutorIn); Perez Paz, Alejandro; Ruiz Soria, Rosa Georgina; Sauer, Markus; Lacovig, Paolo; Dalmiglio, Matteo; Lizzit, Silvano; Yanagi, Kazuhiro; Goldoni, Andrea; Pichler, Thomas; Ayala, Paola; Rubio, Angel.
in: The Journal of Physical Chemistry Part C (Nanomaterials and Interfaces), Band 120, Nr. 32, 18.08.2016, S. 18316-18322.
[4] Controlled thermodynamics for tunable electron doping of graphene on Ir(111). / Struzzi, C.; Praveen, C. S.; Scardamaglia, M.; Verbitskiy, N. I.; Fedorov, A. V.; Weinl, M.; Schreck, M.; Grüneis, Alexander; Piccinin, S.; Fabris, S.; Petaccia, L. (Korresp. AutorIn).
in: Physical Review B (Condensed Matter and Materials Physics), Band 94, Nr. 8, 085427, 25.08.2016.
[5] Environmental control of electron-phonon coupling in barium doped graphene 
Verbitskiy, N. I.; Fedorov, A. V.;  Tresca, C.; Profeta, G.;  Petaccia, L.; Senkovskiy, B. V.; Usachov, D. Yu; Vyalikh, D. V.; Yashina, L. V.;  Eliseev, A. A.; 
2D MATERIALS, Volume: 3, Issue: 4, Article Number: 045003, DOI: 10.1088/2053-1583/3/4/045003, Published: DEC 2016