Evidence for Majorana bound states in an iron-based superconductor

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By using scanning tunneling spectroscopy on the superconducting Dirac surface state of the iron-based superconductor FeTe0.55Se0.45 , we observed a sharp zero-bias peak inside a vortex core that does not split when moving away from the vortex center.



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Download PDF: Science 362, 333–335 (2018)

Observation of unconventional chiral fermions with long Fermi arcs in CoSi

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Our results confirm the existence of unconventional chiral fermions and provide a platform for exploring the physical properties associated with chiral fermions.



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Download PDF: Nature 567,496–499 (2019)

Topological superconductivity on the surface of iron-based superconductor

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This paper proves that the surface states of FeTe0.55Se0.45 are 2D topologically superconducting, and thus provides a simple and possibly high-Tc platform for realizing Majorana fermions.



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Download PDF: Science DOI-10.1126 (2018)

The discovery of Weyl Fermion

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The discovery of Weyl Fermion in the solid was selected as the Physical Review Journal 125th anniversary.



related link: https://journals.aps.org/125years

Download PDF: nature physics.pdf PhysRevX.5.031013.pdf

Observation of three-component fermions

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A fourth kind of fermion has been discovered in a crystal, adding to the three types already theorized.



related link: nature

related link: A new member in topological semimetals family

Observation of Fermi-surface-dependent nodeless superconducting gaps

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This paper provided the first convincing experimental evidence of a new type of s-wave pairing symmetry for the newly discovered iron-based high temperature superconductors by observing the Fermi-surface-dependent nodeless superconducting gaps in an optimally doped pnictide using angle-resolved photoelectron spectroscopy (ARPES).



related link: Science Watch

Download PDF: EuroPhysics Letters 83, 47001 (2008)