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- W2766121822 abstract "We study the phase transition between a trivial and a time-reversal-invariant topological superconductor in a single-band system. By analyzing the interplay of symmetry, topology, and energetics, we show that for a generic normal state band structure, the phase transition occurs via extended intermediate phases in which even- and odd-parity pairing components coexist. For inversion-symmetric systems, the coexistence phase spontaneously breaks time-reversal symmetry. For noncentrosymmetric superconductors, the low-temperature intermediate phase is time-reversal breaking, while the high-temperature phase preserves time-reversal symmetry and has topologically protected line nodes. Furthermore, with approximate rotational invariance, the system has an emergent $U(1)ifmmodetimeselsetexttimesfi{}U(1)$ symmetry, and novel topological defects, such as half vortex lines binding Majorana fermions, can exist. We analytically solve for the dispersion of the Majorana fermion and show that it exhibits small and large velocities at low and high energies. Relevance of our theory to superconducting pyrochlore oxide ${mathrm{Cd}}_{2}{mathrm{Re}}_{2}{mathrm{O}}_{7}$ and half-Heusler materials is discussed." @default.
- W2766121822 created "2017-11-10" @default.
- W2766121822 creator A5011352096 @default.
- W2766121822 creator A5021460990 @default.
- W2766121822 date "2017-11-03" @default.
- W2766121822 modified "2023-10-16" @default.
- W2766121822 title "Topological Phase Transitions in Multicomponent Superconductors" @default.
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- W2766121822 doi "https://doi.org/10.1103/physrevlett.119.187003" @default.
- W2766121822 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29219538" @default.
- W2766121822 hasPublicationYear "2017" @default.
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