24 citations · 100 across the 6 of their papers we have counts for
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Effects of Screening on Propagation of Graphene Surface Plasmons
Ken-ichi Sasaki, Norio Kumada
Electromagnetic fields bound tightly to charge carriers in a two-dimensional sheet, namely surface plasmons, are shielded by metallic plates that are a part of a device. It is show…
Valley-antisymmetric potential in graphene under dynamical deformation
Ken-ichi Sasaki, Yasuhiro Tokura, Hideki Gotoh
When graphene is deformed in a dynamical manner, a time-dependent potential is induced for the electrons. The potential is antisymmetric with respect to valleys, and some straightf…
Decay and Frequency Shift of Inter and Intravalley Phonons in Graphene -Dirac Cone Migration-
K. Sasaki, K. Kato, Y. Tokura +2
By considering analytical expressions for the self-energies of intervalley and intravalley phonons in graphene, we describe the behavior of D, 2D, and D Raman bands with changes…
Polarization Dependence of Raman Spectra in Strained Graphene
K. Sasaki, K. Wakabayashi, T. Enoki
The polarization dependences of the G, D, and 2D (G) bands in Raman spectra at graphene bulk and edge are examined theoretically. The 2D and D bands have different selection rul…
Chiral Gauge Theory for Graphene Edge
Ken-ichi Sasaki, Katsunori Wakabayashi
An effective-mass theory with a deformation-induced (an axial) gauge field is proposed as a theoretical framework to study graphene edge. Though the gauge field is singular at edge…
Berry's Phase for Standing Wave Near Graphene Edge
Ken-ichi Sasaki, Katsunori Wakabayashi, Toshiaki Enoki
Standing waves near the zigzag and armchair edges, and their Berry's phases are investigated. It is suggested that the Berry's phase for the standing wave near the zigzag edge is t…