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Condensed Matter Seminar: Superconductivity in chemical doping of topological insulators

SpeakerProf Yew San Hor - Dept of Physics - Missouri University of Science and Technology
Date Mar 29, 2013
Time 1:00 pm  
Location 190 Engineering Sciences Bldg - corner Goodwin & Springfield 
Sponsor Physics
Contact Peggy Pennell
Phone 217/244-7636
Event type Seminar/Symposium
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Topological insulators (TIs) are new emerging quantum materials which have bulk insulating gap and surface conducting gapless states. Doped TIs have depicted a large variety of bulk physical properties ranging from magnetic to superconducting behaviors. Here, we show that by transition metal doping, a TI can change into a bulk superconductor. However, angle-resolved photoemission spectroscopy (ARPES) of the doped TI shows its topological surface state is unchanged. Zero resistivity, Meissner effect and heat capacity will be shown to suggest that these transition metal doped TIs could be topological superconductors which have bulk superconducting and Majorana surface conducting states.

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