March 2013	Bachelor of Engineering in Applied Physics, The University of Tokyo
March 2016	Master of Engineering in Applied Physics, The University of Tokyo
April 2016 – present	Ph.D. candidate, The University of Tokyo

 

Oct. 2014-	Material Education program for the future leaders in Research, Industry and Technology (MERIT)
Apr. 2016-	JSPS Research Fellowship for Young Scientist (DC1)

 

[2]	K. Hamamoto, M. Ezawa and N. Nagaosa “Purely electrical detection of a skyrmion in constricted geometry” Appl. Phys. Lett. 108, 112401 (2016) https://arxiv.org/abs/1512.07965 http://scitation.aip.org/content/aip/journal/apl/108/11/10.1063/1.4943949
[1]	K. Hamamoto, M. Ezawa and N. Nagaosa “Quantized topological Hall effect in skyrmion crystal” Phys. Rev. B 92, 115417 (2015) https://arxiv.org/abs/1504.06024 http://journals.aps.org/prb/abstract/10.1103/PhysRevB.92.115417

 

◆は招待講演

Oral (domestic)
[5]	K. Hamamoto, T. Ideue, S. Koshikawa, M. Ezawa, N. Shimizu, Y. Kaneko, Y. Tokura, N. Nagaosa and Y. Iwasa ラシュバ型スピン軌道相互作用に起因する非相反電気伝導現象 (Non-reciprocal electrical transport phenomena originating from the Rashba-type spin orbit interaction ) JPS Autumn Meeting 2016, 14aBH-2, Ishikawa, Sept. 13-16, 2016
[4]	K. Hamamoto, S. Koshikawa, T. Ideue, M. Ezawa, N. Nagaosa and Y. Iwasa 反転対称性の破れた物質中における非相反輸送現象 (Non-reciprocal transport phenomena in non-centrosymmetric materials) 61th Condensed Matter Physics Summer School, A-1, Nagano, July 29- Aug. 2, 2016
[3]	K. Hamamoto, M. Ezawa and N. Nagaosa スキルミオンの位置情報の電気的検出法 (Method of the electrical detection of the skyrmion position) JPS Annual Meeting 2016, 21aAG-1, Miyagi, Mar. 19-22, 2016
[2]	K. Hamamoto, M. Ezawa and N. Nagaosa スキルミオン結晶における量子化トポロジカルホール効果 (Quantized topological Hall effect in skyrmion crystal) JPS Autumn Meeting 2015, 18aAG, Osaka, Sept. 16-19, 2015
[1]	K. Hamamoto, M. Ezawa and N. Nagaosa スキルミオン結晶における量子化トポロジカルホール効果 (Quantized topological Hall effect in skyrmion crystal) 60th Condensed Matter Physics Summer School, F-7, Gifu, July 27-31, 2015
Poster (international)
[4]	K. Hamamoto, T. Ideue, S. Koshikawa, M. Ezawa, N. Shimizu, Y. Kaneko, Y. Tokura, N. Nagaosa and Y. Iwasa “Non-reciprocal responses in Rashba system” International Workshop on Nano-Spin Conversion Science & Quantum Spin Dynamics, N-15, Oct. 12-15, Tokyo, 2016
[3]	K. Hamamoto, M. Ezawa and N. Nagaosa “Quantized Hall conductance in 2D electron system coupled to skyrmion crystal” CEMS Topical Meeting on Oxide Interfaces 2015, P03, Nov. 5-6, 2015
[2]	K. Hamamoto, M. Ezawa and N. Nagaosa “Quantized anomalous Hall effects in skyrmion crystal” New Perspectives in Spintronic and Mesoscopic Physics, PS24, Chiba, Jun 1-19, 2015
[1]	K. Hamamoto, M. Ezawa and N. Nagaosa “Quantized anomalous Hall effects in skyrmion crystal” Workshop on "Topological Magnets", P08, Saitama, May 25-27, 2015
Poster (domestic)
[4]	K. Hamamoto, M. Ezawa and N. Nagaosa 磁気スキルミオンによるトポロジカルホール効果の理論 (Theoretical studies on topological Hall effect in magnetic skyrmionic systems) 61th Condensed Matter Physics Summer School, PS-15, Nagano, July 29- Aug. 2, 2016
[3]	K. Hamamoto, M. Ezawa and N. Nagaosa “Theoretical study on skyrmions and quantum transport phenomena” Annual Meeting on Nano Spin Conversion Science 2015, PS-44, Miyagi, Jan. 7-8, 2016
[2]	K. Hamamoto, M. Ezawa and N. Nagaosa 磁気スキルミオン結晶における量子化トポロジカルホール効果 (Quantized topological Hall effect in magnetic skyrmion crystal) 60th Condensed Matter Physics Summer School, Gifu, July 27-31, 2015
[1]	K. Hamamoto, M. Ezawa and N. Nagaosa “スキルミオン-電子結合系におけるホール伝導度の量子化” (Quantized Hall conductance in 2D electron system coupled to skyrmion crystal) 9th Joint Research Meeting of MEXT National Projects on Condensed-Matter Science, P2-31, Tokyo, Dec. 1-2, 2013

 

Feb. 2016

Tanaka Prize (Best master thesis in Dept. of Applied Physics, Univ. of Tokyo)

 

Non-reciprocal transport is a consequence of the inversion symmetry breaking where the electrical resistivity depends on the direction of the current. This effect can be utilized as a natural diode, however, the microscopic description has been absent until recently.
We theoretically investigate this phenomenon using the nonlinear semiclassical transport formalisms.