74 citations · 381 across the 34 of their papers we have counts for
Showing 2009Show all
3 papers · 1 filter
cond-mat.mes-hall2009★ 30 cited
Topological stability of Majorana zero-modes in superconductor-topological insulator systems
T. Fukui, T. Fujiwara
We derive an index theorem for zero-energy Majorana fermion modes in a superconductor-topological insulator system in both two and three dimensions, which is valid for models with…
cond-mat.mes-hall2009★ 8 cited
A Z index of Dirac operator with time reversal symmetry
T. Fukui, T. Fujiwara
With time reversal symmetry a Dirac operator has vanishing index and Chern number. We show that we can nevertheless define a nontrivial Z index as well as a corresponding topol…
cond-mat.mes-hall2009★ 8 cited
Quantization of non-Abelian Berry phase for time reversal invariant systems
T. Fukui, T. Fujiwara
We present a quantized non-Abelian Berry phase for time reversal invariant systems such as quantum spin Hall effect. Ordinary Berry phase is defined by an integral of Berry's gauge…