Multi-component superconducting pairing and possible vestigial order in half-Heusler compounds
ORAL
Abstract
Various members of the half-Heusler family undergo a superconducting transition with a Tc ~1K.
Despite intense and controversial debate on the microscopic pairing symmetry, indications supporting an unconventional pairing mechanisms accumulate.
For each multi-component pairing state, we classify all possible ground states and decompose them according to the involved broken symmetries.
Moreover, we study the role of fluctuations. We demonstrate that---
despite being a cubic system---almost every pairing state can potentially stabilize a vestigial phase, i.e. where superconducting fluctuations condense in a long-range ordered state above Tc.
These insights can be used as a helpful tool to identify the pairing symmetry.
Despite intense and controversial debate on the microscopic pairing symmetry, indications supporting an unconventional pairing mechanisms accumulate.
For each multi-component pairing state, we classify all possible ground states and decompose them according to the involved broken symmetries.
Moreover, we study the role of fluctuations. We demonstrate that---
despite being a cubic system---almost every pairing state can potentially stabilize a vestigial phase, i.e. where superconducting fluctuations condense in a long-range ordered state above Tc.
These insights can be used as a helpful tool to identify the pairing symmetry.
*Support from DFG - TRR 288-422213477 Elasto-Q-Mat (project B01)
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Presenters
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Matthias Hecker
- School of Physics and Astronomy, University of Minnesota
- Karlsruhe Institute of Technology