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Topological Phases of Noncentrosymmetric Superconductors: Edge States, Majorana Fermions, and the Non-Abelian Statistics
Masatoshi Sato, Satoshi Fujimoto
The existence of edge states and zero energy modes in vortex cores is a hallmark of topologically nontrivial phases realized in various condensed matter systems such as the fractio…
Preparation of the oxypnictides and studies on their superconductivity
Ayaka Kawabata, Sang Chul Lee, Taketo Moyoshi +2
LaFe1-yCoyAsO1-xFx (x=0.11) with various y values were prepared and their electrical resistivities, superconducting diamagnetisms and Hall coefficients have been measured. 75As- an…
The Hall conductance, topological quantum phase transition and the Diophantine equation on honeycomb lattice
Masatoshi Sato, Daijiro Tobe, Mahito Kohmoto
We consider a tight-binding model with the nearest neighbour hopping integrals on the honeycomb lattice in a magnetic field. Assuming one of the three hopping integrals, which we d…
On the Superconductivity of LaFe1-yCoyAsO1-xFx
Ayaka Kawabata, Sang Chul Lee, Taketo Moyoshi +2
We have prepared the superconducting system LaFe1-yCoyAsO1-xFx (x=0.11) and carried out measurements of their electrical resistivities r and superconducting diamagnetisms. 75As- an…
Magnetic Excitations of Spin-Gap System Na3Cu2SbO6 with Distorted Honeycomb Structure
Yoko Miura, Yukio Yasui, Taketo Moyoshi +2
Magnetic excitation spectra of quantum spins of Na3Cu2SbO6 with the distorted honeycomb structure have been measured by neutron inelastic scattering. The intensity distribution and…
Topological properties of spin-triplet superconductors and the Fermi surface topology in the normal state
Masatoshi Sato
We report intimate relations between topological properties of full gapped spin-triplet superconductors with time-reversal invariance and the Fermi surface topology in the normal s…