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10 papers · 2 filters
Topological Kondo Insulators
Maxim Dzero, Kai Sun, Victor Galitski +1
Kondo insulators are particularly simple type of heavy electron material, where a filled band of heavy quasiparticles gives rise to a narrow band insulator. Starting with the Ander…
Robustness of Majorana fermions in 2D topological superconductors
Jay D. Sau, Roman M. Lutchyn, Sumanta Tewari +1
In 2D chiral p-wave superconductors, the zero-energy Majorana fermion excitations trapped at vortex cores follow non-Abelian statistics which can be potentially exploited to build…
A theorem for the existence of Majorana fermion modes in spin-orbit-coupled semiconductors
Sumanta Tewari, Jay D. Sau, S. Das Sarma
We prove an index theorem for the existence of Majorana zero modes in a semiconducting thin film with a sizable spin-orbit coupling when it is adjacent to an s-wave superconductor.…
Stable topological phases in a family of two-dimensional fermion models
Meng Cheng, Kai Sun, Victor Galitski +1
We show that a large class of two-dimensional spinless fermion models exhibit topological superconducting phases characterized by a non-zero Chern number. More specifically, we con…
A generic new platform for topological quantum computation using semiconductor heterostructures
Jay D. Sau, Roman M. Lutchyn, Sumanta Tewari +1
We show that a film of a semiconductor such as GaAs, in which s-wave superconductivity and a Zeeman splitting are induced by proximity effect, supports zero-energy Majorana fermion…
Spin-charge interplay in electronic liquid crystals: fluctuating spin stripe driven by charge nematic
Kai Sun, Michael J. Lawler, Eun-Ah Kim
We study the interplay between charge and spin ordering in electronic liquid crystalline states with a particular emphasis on fluctuating spin stripe phenomena observed in recent n…