RIKEN Center for Emergent Matter Science Quantum Effect Device Research Team
Team Leader: Koji Ishibashi (D.Eng.)
Research Summary
To explore future nanoelectronics, we develop fabrication processes of sub-10 nm structures, and study their electroical and optical properties to apply them to functional nanodevices. We use carbon nanotubes, semiconductor (Ge/Si, InAs, InSb et al.) nanowires, graphene and functional molecules as building blocks of those nanostructures. Besides, we are interested in organic optical devices combined with plasmonic structures . With a combination of the top-down and bottom-up technologies, we fabricate quantum dots, CNT/molecule heterostructures and semiconductor/superconductor hybrid nanostructures for use in single electron devices and quantum computing devices.
Main Research Fields
- Complex Systems
Related Research Fields
- Mathematical & Physical Sciences
- Engineering
Keywords
- Quantum devices
- Nanostructures
- Nanofabrication
Selected Publications
- 1.Russell S. Deacon, Jonas Wiedenmann, Erwann Bocquillon, Teun M. Klapwijk, Philipp Leubner, Christoph Brüne, Seigo Tarucha, Koji Ishibashi, Hartmut Buhmann, Laurens W. Molenkamp,
"Josephson radiation from gapless Andreev bound states in HgTe-based topological junctions",
Phys. Rev. X 7, 021011 (2017) - 2.Hiroshi Tomizawa, Katsuya Suzuki, Tomohiro Yamaguchi, Seiji Akita and Koji Ishibashi,
"Control of tunnel barriers in multi-wall carbon nanotubes using focused ion beam irradiation",
Nanotechnology, 28, 165302 (2017) - 3.Erwann Bocquillon, Russell S. Deacon, Jonas Wiedenmann, Philipp Leubner, Teun M. Klapwijk, Christoph Brüne, Koji Ishibashi, H. Buhmann, Laurens W. Molenkamp,
"Gapless Andreev bound states in the quantum spin Hall insulator HgTe",
Nature Nanotechnology, 12, 137 (2017) - 4.Akira Hida, Takayuki Suzuki, and Koji Ishibashi,
"Detecting the formation of single-walled carbon nanotube rings by photoabsorption spectroscopy",
Appl. Phys. Express 9, 085102 (2016) - 5.Rui Wang, Russell S. Deacon, Diana Car, Erik P. A. M. Bakkers, and Koji Ishibashi
"InSb nanowire double quantum dots coupled to a superconducting microwave cavity",
Appl. Phys. Lett. 108, 203502 (2016) - 6.Akira Hida and Koji Ishibashi.:
"Molecule-induced quantum confinement in single-walled carbon nanotube"
Appl. Phys. Express 8, 045101 (2015) - 7.Xin Zhou and Koji Ishibashi.:
"Single charge detection in capacitively coupled integrated single electron transistors based on single-walled carbon nanotubes"
Appl. Phys. Lett. 101, 123506 (2012) - 8.T. Nishio, T. Kozakai, S. Amaha, M. Larsson, H. Nilsson, H. Q. Xu, G. Q. Zhang, K. Tateno, H. Takayanagi and K. Ishibashi.:
"Supercurrent through InAs nanowires with highly transparent superconducting contacts"
Nanotechnology, 22, 445701 (2011)
Recent Research Results
Jul. 1, 2015
Producing spin-entangled electrons
Related Links
Lab Members
Principal investigator
- Koji Ishibashi
- Team Leader
Core members
- Keiji Ono
- Senior Research Scientist
- Russell Stewart Deacon
- Senior Research Scientist
- Hui Wang
- Postdoctoral Researcher
Contact Information
W407, Cooperation Center, 2-1 Hirosawa, Wako, Saitama
351-0198 Japan
Email: kishiba [at] riken.jp