Recent Publication

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Unconventional satellite resistance peaks in moiré superlattice of h-BN/ AB-stacked tetralayer-graphene heterostructure, Fumiya Mukai, Kota Horii, Ryoya Ebisuoka, Kenji Watanabe, Takashi Taniguchi and Ryuta Yagi, Commun. Phys. 4, 109 (2021). DOI:10.1038/s42005-021-00615-2

 Multiband ballistic transport and anisotropic commensurability magnetoresistance in antidot lattices of AB-stacked trilayer graphene, Shingo Tajima, Ryoya Ebisuoka, Kenji Watanabe, Takashi Taniguchi and Ryuta Yagi.J. Phys. Soc. Jpn 89, 044703 (2020).  DOI:10.7566/JPSJ.89.04470

Tomoaki Nakasuga, Taiki Hirahara, Kota Horii, Ryoya Ebisuoka, Shingo Tajima, Kenji Watanabe, Takashi Taniguchi, and Ryuta Yagi, "Intrinsic resistance peaks in AB-stacked multilayer graphene with odd number of layers", Phys. Rev. B 101, 035419 (2020).  DIO:10.1103/PhysRevB. 101.035419

Kota Horii, Tomoaki Nakasuga, Taiki Hirahara, Shingo Tajima, Ryoya Ebisuoka, Kenji Watanabe, Takashi Taniguchi, and Ryuta Yagi, "Magnetotransport study of the mini-Dirac cone in AB-stacked four- to six-layer graphene under perpendicular electric field", Phys. Rev. B 100, 245420 (2019). DOI: 10.1103/PhysRevB.100.24542

Tomoaki Nakasuga, Shingo Tajima, Taiki Hirahara, Ryoya Ebisuoka, Takushi Oka, Kenji Watanabe, Takashi Taniguchi and Ryuta Yagi, Low energy band structure in Bernal stacked hexlayer graphene: Landau fan diagram and resistance ridge , Phys. Rev. B 99, 085404 (2019). DOI: 10.1103/PhysRevB.99.085404.

 Takushi Oka, Shingo Tajima, Ryoya Ebisuoka, Taiki Hirahara, Kenji Watanabe, Takashi Taniguchi, and Ryuta Yagi, Ballistic transport experiment detects Fermi surface anisotropy of graphene, Phys. Rev. B 99, 035440 (2019). DOI: 10.1103/PhysRevB.99.035440.

Taiki Hirahara, Ryoya Ebisuoka, Takushi Oka, Tomoaki Nakasuga, Shingo Tajima, Kenji Watanabe, Takashi Taniguchi and Ryuta Yagi, "Multilayer graphene shows intrinsic resistance peaks in the carrier density dependence".Sci. Rep. 8, 13992 (2018). DOI: 10.1038/s41598-018-32214-7.

Ryuta Yagi, Taiki Hirahara, Ryoya Ebisuoka, Tomoaki Nakasuga, Shingo Tajima, Kenji Watanabe, and Takashi Taniguchi , "Low-energy band structure and even-odd layer number effect in AB-stacked multilayer graphene", Sci. Rep. 8, 13018 (2018). DOI:10.1038/s41598-018-31291-y

T. Hirahara, R. Ebisuoka, K. Watanabe, T. Taniguchi and R. Yagi, "Magnetoresistance measurements of tetralayer graphene device with single gate electrode", J. Phys. Conf. Ser. 969, 012150 (2018).

R. Yagi, R. Sakakibara, R. Ebisuoka, T. Hirahara, S. Uchino,  K. Watanabe, T. Taniguchi,  “Commensurablity magnetoresistance due to Ballistic Transport in Graphene Antidot Lattices.” to be published in IOP conference series.

Older Publications.

  Submitted Papers

Ryoya Ebisuoka, Takushi Oka, Shingo Tajima, Taiki Hirahara, Tomoaki Nakasuga, Kenji Watanabe, Takashi Taniguchi, and Ryuta Yagi Magnetic xxxxxxxxxxxxxxxxxxxxxx  in Moiré Superlattice of h-BN-bilayer Graphene Heterostructures, submitted, (Under Review).  Comming Soon. Preprint is available if requested.

  Recent Presentation

Graphene Week 2019, 2019 Nov 24, Shingo Tajma, Takushi Oka, Ryoya Ebisuoka, Kenji Watanabe, Takashi Taniguchi, and Ryuta Yagi, Detecting anisotropy in the low Energy Band structure of graphene by ballistic Transport Experiments

Graphene Week 2019,  2019 Nov 26,, Kota Horii, Tomoaki Nakasuga, Ryoya Ebisuoka, Shingo Tajima, Kenji Watanabe, Takashi Taniguhi and Ryuta Yagi, Magnetotransport study of mini-Dirac cones of AB-stacked graphene with multiple number of layers in perpendicular electric fields

 Graphene Week 2019,  2019 Nov 26, R. Yagi, T. Hirahara, R. Ebisuoka, T. Oka, T. Nakasuga, S. Tajima, K.Watanabe, T. Taniguchi, Evolution of Landau level structure of AB-stacked graphene with increasing number of layers

Graphene Week 2019,  2019 Nov24  Tomoaki Nakasuga, Taiki Hirahara, Shingo Tajima, Kota Horii, Ryoya Ebisuoka, Kenji Watanabe, Takashi Taniguchi and Ryuta Yagi, Probing dispersion relations of AB-stacked graphene with intrinsic resistance peaks

APS March Meeting, 2019 Mar. 4-8, Ryuta Yagi, Taiki Hirahara, Ryoya Ebisuoka, Tomoaki Nakasuga, Shingo Tajima, Kenji Watanabe, Takashi Taniguch, Low-energy band structure and even-odd layer number effect in AB-stacked multilayer graphene: evolution of Landau fan diagrams from 1 to 7 layers

APS March Meeting, 2019 Mar. 4-8,Ryuta Yagi, Taiki Hirahara, Ryoya Ebisuoka, Takushi Oka, Shingo Tajima , Kenji Watanabe, Takashi Taniguchi, Multilayer graphene shows intrinsic resistance peaks in the carrier density dependence: experiments in tetra- and hexlayer graphene

APS March Meeting, 2019 Mar. 4-8, Ryuta Yagi, Takushi Oka, Ryoya Ebisuoka, Taiki Hirahara, Kenji Watanabe, Takashi Taniguchi, APS March meeting, March 4-8, 2019, Boston, Massachusetts, USA.   2019年3月4日

NT18, 2018 Aug, Beijin China, R. Yagi et al., Observing Evolution of the low-energy band structure in Bernal stacked multilayer graphene with 1 to 7 layers.

NT18, 2018 Aug, Beijin China, Hirahara et al., Electronic Bandstructure of Tetralayer Graphene, Effect of Perpendicular Electric Field.

LT28, 2017, Aug, Goeteborg, Sweden, Ebisuoka, T. Hirahara, K. Watanabe, T. Taniguchi, and R. Yagi,  On low field magneto-resistance oscillations in moiré superlattices of bilayer graphene/h-BN.

LT28,  2017,Aug, Goeteborg, Sweden, T. Hirahara, R. Ebisuoka, K. Watanabe, T. Taniguchi, and R. Yagi, Landau level structure of Bernal-stacked tetra-layer graphene.

APS March Meeting 2017, March New Orleans, USA, R.Yagi et al. CVD Growth of Bi2Se3 Crystals.

Graphene Malaysia,  Nov 8-9, 2016, Kuala Lumpur,  Malaysia, Ryuta Yagi, Ryoji Sakakibara, Ryoya Ebisuoka, Jumpei Onishi, Kenji Watanabe, Takashi Taniguchi2, and Yasuhiro Iye, Ballistic and phase coherent transport in high-mobility graphene antidot lattices made on h-BN.

ICPS  2016, Aug, Beijin, China,    R. Yagi et al. Commensurability magnetoresistance due to ballistic transport in highmobility graphene antidot lattices made on h-BN

HMF22,  2016 July, Sapporo, Japan,  R. Yagi et al.  Magneto-transport of high-mobility graphene antidot lattices made on h-BN – ballistic and phase coherent transport.

HMF22,  2016 July, Sapporo, Japan,  R. Ebisuoka et al.  Brillouin zone folding and anisotropic ban structure in more superlattices in bilayer graphene/h-BN heterostructure.

HMF22,  2016 July, Sapporo, Japan,  T. Hirahara et al.,   Magnetotransport study of electronic band structure in tetralayer graphene using high-mobility graphene fabricated on h-BN.

APS March Meeting 2016, March, Baltimore, USA, R. Yagi et al. Ballistic transport in graphene antidot lattices.

EP2DS, 2015, Jul,  Sendai, Japan, R. Yagi et al.,  Quantum Correction to Conductance in Graphene Antidot Lattices.

NT15, 2015, Aug, Nagoya, Japan, R. Yagi et al.,Graphene made by exfoliation of graphite intercalation compound.

 APS March Meeting 2015, San Antonio, USA, R. Yagi et al.,Altshuler-Aronov-Spivak Osicllation in Graphene Antidot Lattice.

APS March Meeting 2014, Denver, San Antonio, R. Yagi et al.,  Magnetoresistance of thin film devices fabricated from bulk crystal of Bi2Se3 and Bi2Te3.

APS March Meeting 2013, Baltimore, USA, R. Yagi et al.,  “Fabricating graphene from graphite intercalation compounds.