Publications (54)
Theory of vortex structure in Josephson junctions with multiple tunneling channels: Vortex enlargement as a probe of $\pm s$-wave superconductivity
Yukihiro Ota, Masahiko Machida, Tomio Koyama +1
Evaluation of ambient dose equivalent rates influenced by vertical and horizontal distribution of radioactive cesium in soil in Fukushima Prefecture
Alex Malins, Hiroshi Kurikami, Shigeo Nakama +4
Field-angle dependence of the quasiparticle scattering inside a vortex core in unconventional superconductors
Yoichi Higashi, Yuki Nagai, Masahiko Machida +1
Direct Numerical Demonstration of Sign-preserving Quasiparticle Interference via Impurity inside Vortex Core in Unconventional Superconductors
Yuki Nagai, Noriyuki Nakai, Masahiko Machida
Theory of heterotic SIS Josephson junctions between single- and multi-gap superconductors
Yukihiro Ota, Masahiko Machida, Tomio Koyama +1
First-principles Studies for the Hydrogen Doping Effects on Iron-based Superconductors
Hiroki Nakamura, Masahiko Machida
Superconductivity in repulsively interacting fermions on a diamond chain: flat-band induced pairing
Keita Kobayashi, Masahiko Okumura, Susumu Yamada +2
Ambegaokar-Baratoff relations of Josephson critical current in heterojunctions with multi-gap superconductors
Yukihiro Ota, Noriyuki Nakai, Hiroki Nakamura +5
Fields of View for Environmental Radioactivity
Alex Malins, Masahiko Okumura, Masahiko Machida +2
Theory of low-energy behaviors in topological $s$-wave pairing superconductors
Yukihiro Ota, Yuki Nagai, Masahiko Machida
Topographic Effects on Ambient Dose Equivalent Rates from Radiocesium Fallout
Alex Malins, Masahiko Okumura, Masahiko Machida +1
Vibronic mechanism of high-Tc superconductivity
Masashi Tachiki, Masahiko Machida, Takeshi Egami
Spin-polarized Majorana Bound States inside a Vortex Core in Topological Superconductors
Yuki Nagai, Hiroki Nakamura, Masahiko Machida
Efficient Numerical Self-consistent Mean-field Approach for Fermionic Many-body Systems by Polynomial Expansion on Spectral Density
Yuki Nagai, Yukihiro Ota, Masahiko Machida
Effect of Fermi Surface Topology on Inter-Layer Magnetoresistance in Layered Multiband Systems: Application to LaFeAsO1-xFx
Takao Morinari, Hiroki Nakamura, Masahiko Machida +1
Inverse coherence effects in nuclear magnetic relaxation rates as a sign of topological superconductivity
Yuki Nagai, Yukihiro Ota, Masahiko Machida
Non-magnetic impurity effects in a three-dimensional topological superconductor: From p- to s-wave behaviors
Yuki Nagai, Yukihiro Ota, Masahiko Machida
Impurity effects in a two-dimensional topological superconductor: A link of Tc-robustness with a topological number
Yuki Nagai, Yukihiro Ota, Masahiko Machida
Effect of anisotropic Fermi surface on the flux-flow resistivity under rotating magnetic field
Yoichi Higashi, Yuki Nagai, Masahiko Machida +1
A screened automated structural search with semiempirical methods
Yukihiro Ota, Sergi Ruiz-Barragan, Masahiko Machida +1
Comment on `Update of 40K and 226Ra and 232Th series $γ$-to-dose conversion factors for soil'
Alex Malins, Masahiko Machida, Kimiaki Saito
Emergence of $η$-pairing ground-state in population-imbalanced attractive Fermi-gases filling $p$ orbitals on 1-D optical lattice
Keita Kobayashi, Yukihiro Ota, Masahiko Okumura +2
Topological s-wave pairing superconductivity with spatial inhomogeneity: Mid-gap-state appearance and robustness of superconductivity
Yuki Nagai, Yukihiro Ota, Masahiko Machida
Quantum phases in $p$-orbital degenerated attractive 1D fermionic optical lattices
Keita Kobayashi, Yukihiro Ota, Masahiko Okumura +2
Phase-Sensitive Flux-Flow resistivity in Unconventional Superconductors
Yoichi Higashi, Yuki Nagai, Masahiko Machida +1
Ground-state properties of the one-dimensional attractive Hubbard model with confinement: a comparative study
Ji-Hong Hu, Jing-Jing Wang, Gao Xianlong +4
Effect of uniaxially anisotropic Fermi surface on the quasiparticle scattering inside a vortex core in unconventional superconductors
Yoichi Higashi, Yuki Nagai, Masahiko Machida +1
Variety of c-axis collective excitations in layered multigap superconductors
Yukihiro Ota, Masahiko Machida, Tomio Koyama
Inhomogeneity Effects in Topological Superconductors
Yuki Nagai, Hiroki Nakamura, Masahiko Machida
Two-dimensional macroscopic quantum tunneling in multi-gap superconductor Josephson junctions
Hidehiro Asai, Shiro Kawabata, Yukihiro Ota +1
Nuclear magnetic relaxation and superfluid density in Fe-pnictide superconductors: An anisotropic \pm s-wave scenario
Yuki Nagai, Nobuhiko Hayashi, Noriyuki Nakai +3
Microwave Surface Impedance Measurements of LiFeAs Single Crystals
Yoshinori Imai, Hideyuki Takahashi, Kentaro Kitagawa +6
Macroscopic quantum tunneling in multigap superconducting Josephson junctions: Escape rate enhancement via quantum fluctuations of Josephson-Leggett mode
Yukihiro Ota, Masahiko Machida, Tomio Koyama
Surface states around a vortex in topological superconductors: Intersection of a surface and a vortex
Yuki Nagai, Hiroki Nakamura, Masahiko Machida
Magnetic Ordering in Blocking Layer and Highly Anisotropic Electronic Structure of High-Tc Iron-based Superconductor Sr2VFeAsO3: LDA+U Studies
Hiroki Nakamura, Masahiko Machida
Nontrivial Haldane phase of an atomic two-component Fermi gas trapped in a 1d optical lattice
Keita Kobayashi, Masahiko Okumura, Yukihiro Ota +2
Surface-angle dependence of the tunneling spectroscopy in iron-based superconductors: sign-reversing s-wave scenarios
Yuki Nagai, Nobuhiko Hayashi, Masahiko Machida
Collective modes in multiband superfluids and superconductors: Multiple dynamical classes
Yukihiro Ota, Masahiko Machida, Tomio Koyama +1
Three-dimensional dynamics of vortex lattice formation in Bose-Einstein condensates
Kenichi Kasamatsu, Masahiko Machida, Narimasa Sasa +1
Phonons and Spin Excitations in Fe-Based Superconductor Ca10Pt4As8(Fe1-xPtxAs)10 (x ~ 0.2)
Kazuhiko Ikeuchi, Masatoshi Sato, Ryoichi Kajimoto +7
First-principle study of antimony doping effects on the iron-based superconductor CaFe(Sb$_{x}$As$_{1-x}$)$_{2}$
Yuki Nagai, Hiroki Nakamura, Masahiko Machida +1
Field-angle Resolved Flux-flow Resistivity as a Phase-sensitive Probe of Unconventional Cooper Pairing
Yoichi Higashi, Yuki Nagai, Masahiko Machida +1
Intergrain Josephson Currents in Multigap Superconductors: Microscopic Origin of Low Intergrain Critical Current and Its Recovery Potential in Iron-Pnictide Materials
Yukihiro Ota, Masahiko Machida, Tomio Koyama
Impurity effect in multi-orbital, sign-reversing s-wave superconductors
Yuki Nagai, Kazuhiko Kuroki, Masahiko Machida +1
Massless collective excitations in frustrated multi-band superconductors
Keita Kobayashi, Masahiko Machida, Yukihiro Ota +1
Shapiro Steps as a Direct Probe of $\pm s$-wave Symmetry in Multi-gap Superconducting Josephson Junctions
Yukihiro Ota, Masahiko Machida, Tomio Koyama
Energy Spectra of Quantum Turbulence: Large-scale Simulation and Modeling
Narimasa Sasa, Takuma Kano, Masahiko Machida +3
Superconducting gap function in the organic superconductor (TMTSF)2ClO4 with anion ordering; First-principles calculations and quasiclassical analysis for angle-resolved heat capacity
Yuki Nagai, Hiroki Nakamura, Masahiko Machida
Rotational Isotropy Breaking as Proof for Spin-polarized Cooper Pairs in the Topological Superconductor CuxBi2Se3
Yuki Nagai, Hiroki Nakamura, Masahiko Machida
First-Principles Study for the Anisotropy of Iron-based Superconductors toward Power and Device Applications
Hiroki Nakamura, Masahiko Machida, Tomio Koyama +1
Theory of macroscopic quantum tunneling with Josephson-Leggett collective excitations in multi-band superconducting Josephson junctions
Hidehiro Asai, Yukihiro Ota, Shiro Kawabata +2
Theory for Photon-Assisted Macroscopic Quantum Tunneling in a Stack of Intrinsic Josephson Junctions
Masahiko Machida, Tomio Koyama
Quasiclassical Treatment and Odd-parity/Triplet Correspondence in Topological Superconductors
Yuki Nagai, Hiroki Nakamura, Masahiko Machida
Ginzburg-Landau calculations of d-wave superconducting dot in s-wave superconducting matrix
Masaru Kato, Masayuki Ako, Masahiko Machida +2