13 citations · 36 across the 7 of their papers we have counts for
7 papers
Anisotropic transport of Josephson vortices in atomic-layer superconductors on vicinal surfaces
Wenxuan Qian, Yash Chauhan, Ryohei Nemoto +3
Atomic steps have strong influences on surface two-dimensional superconductors. Josephson vortices formed at the atomic steps under magnetic fields may dominate transport phenomena…
Topological surface states hybridized with bulk states of Bi-doped PbSb2Te4 revealed in quasiparticle interference
Yuya Hattori, Keisuke Sagisaka, Shunsuke Yoshizawa +2
Topological surface states of Bi-doped PbSb2Te4 [Pb(Bi0.20Sb0.80)2Te4] are investigated through analyses of quasiparticle interference (QPI) patterns observed by scanning tunneling…
Experimental verification of band convergence in Sr and Na codoped PbTe
Yuya Hattori, Shunsuke Yoshizawa, Keisuke Sagisaka +5
Scanning tunneling microscopy and transport measurements have been performed to investigate the electronic structure and its temperature dependence in heavily Sr and Na codoped PbT…
Visualization of alternating triangular domains of charge density waves in 2H-NbSe by scanning tunneling microscopy
Shunsuke Yoshizawa, Keisuke Sagisaka, Hideaki Sakata
The charge density wave (CDW) state of 2H-NbSe features commensurate domains separated by domain boundaries accompanied by phase slips known as discommensurations. We have unam…
Emergence of metallic surface states and negative differential conductance in thin -FeSi films on Si(001)
Keisuke Sagisaka, Tomoko Kusawake, David Bowler +1
The electronic properties of the surface of -FeSi have been debated for a long while. We studied the surface states of -FeSi films grown on Si(001) substrates using s…
Importance of bulk states for the electronic structure of semiconductor surfaces: implications for finite slabs
Keisuke Sagisaka, Jun Nara, David Bowler
We investigate the influence of slab thickness on the electronic structure of the Si(100)-p(2x2) surface in density functional theory (DFT) calculations, considering both density o…
Single-layer Graphene Nearly 100% Covering an Entire Substrate
Mingsheng Xu, Daisuke Fujita, Keisuke Sagisaka +2
Graphene has recently attracted a great deal of interest in both academia and industry because of its unique electronic and optical properties [1,2], as well as its chemical, therm…