Research
Research Interests
I have been studying the physis of mesoscopic systems, nano-materials, such as quantum dots, carbon nanotubes, nano-mechanics.
Main studies
- Quantum dot
- Carbon nanotubes
- Nano-mechanics
Quantum dot:
Kondo effect:
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J. Phys. Soc. Jpn. 74, 103 (2005). (Kondo effect: Review of our research with NRG)
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"Kondo Effects in Quantum Dots: Theory", to be appeared as a chapter in Encyclopedia of Condensed Matter Physics, 2nd edition (Elsevier, 2023)
Spin blockade:
Phys. Rev. Lett. 110, 016803, (2013),
Phys. Rev. B, 89, 085302 (2014).
(Amaha, Izumida, et al. Observation of Triple-Quantum-Dot [PRL(2013)] and Quadruplet Spin Blockade in Double-quantum-dot [PRB (2014)]. Explaining the observations by theory with the Master equation method.
Comparison between Exp. and Theory for the spin blockade
（from PRB 89 085302 (2015)）
Comparison between Exp. and Theory for the spin blockade
（from PRB 89 085302 (2015)）
Carbon nanotubes:
Tomonaga-Luttinger liquid:
New J. Phys. 7, 244 (2005). (Tomonaga-Luttinger liquid and NEMS)
Curvature-induced effects:
J. Phys. Soc. Jpn. 78, 074707 (2009). (Spin-orbit interaction)
Dirac cone splitting by the spin-orbit interaction
Dirac cone splitting by the spin-orbit interaction
Phys. Rev. B 85, 165430 (2012). (Linear band tilting and vernier spectrum)
Phys. Rev. B 111, 045121 (2025). (Analysis of the Curvature-induced effects with the Group theory)
Finite-length effects (Mesoscopic effects):
Phys. Rev. B 91, 235442 (2015). (Valley coupling in finite-length carbon nanotubes)
Phys. Rev. B 93, 195442 (2016).
(Angular momentum and valley coupling, Bulk-edge correspondence for edge states.
Link to Brief summary.)
Topological states：
J. Phys. Soc. Jpn. 86, 013702 (2017).
（Okuyama, Izumida, Eto. Tapological transition）
Phys. Rev. B 96, 125414 (2017).
（Topological edge states in superconducting correlation）
Phys. Rev. B 97, 075141 (2018).
（Marganska, Milz, Izumida, Strunk, Grifoni. Majorana-quasi particles）
Electron correlation：
Phys. Rev. Lett. 125, 056401 (2020).
（Moca, Izumida, Dora, Legeza, Asboth, Zarand. Electron correlation for topological edge states）
Nano-mechanics:
Mechanical vibration of rolled-up semiconductors：
Phys. Rev. B 85, 075313 (2012). (Theoretical study on mechanical vibration of rolling NEMS)
Calculated vibrational mode for rolled semiconductor
Calculated vibrational mode for rolled semiconductor
Phys. Rev. B, 89, 245304 (2014). (Okamoto, Izumida, Friedland, et al. Observation of mechanical vibration of a cylindrical semiconductor. Explaining the observations by theory. Animation of vibration modes is shown as a supplemental material of the paper, here.)
Nanorotor driven by electron spin：
Phys. Rev. Lett. 128, 017701 (2022).
Schematic diagram of a nanomotor driven by spin injection
Awards
2014/03/29: 19th JPS Award for Outstanding Papers (for the following paper)
J. Phys. Soc. Jpn. 78, 074707 (2009)
2015/10/31: 11th Morita-Kinen Prize
(from Alumni Association, Tohoku University Department of Physics, for the following three papers)
J. Phys. Soc. Jpn. 78, 074707 (2009)
Phys. Rev. B 85, 165430 (2012)
Phys. Rev. B 91, 235442 (2015)
Publication
Presentation
Reprint requirement
2015/10/31: 11th Morita-Kinen Prize (from Alumni Association, Tohoku University Department of Physics, for the following three papers)
J. Phys. Soc. Jpn. 78, 074707 (2009)
Phys. Rev. B 85, 165430 (2012)
Phys. Rev. B 91, 235442 (2015)
Publication
Presentation
Reprint requirement
If you need reprints of our paper, please contact me by e-mail (wizumida_at_tohoku.ac.jp, "_at_" ==> "@" ). I will send the pdf files.