Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.217004
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Funding
- JSPS (NEXT Program and KAKENHI) [24740237]
- MEXT (Innovative Area Topological Quantum Phenomena'' KAKENHI)
- AFOSR [AOARD 124038]
- Grants-in-Aid for Scientific Research [22103004, 22103001, 24740237] Funding Source: KAKEN
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The existence of topological superconductors preserving time-reversal symmetry was recently predicted, and they are expected to provide a solid-state realization of itinerant massless Majorana fermions and a route to topological quantum computation. Their first likely example, CuxBi2Se3, was discovered last year, but the search for new materials has so far been hindered by the lack of a guiding principle. Here, we report point-contact spectroscopy experiments suggesting that the low-carrier-density superconductor Sn1-xInx Te is accompanied by surface Andreev bound states which, with the help of theoretical analysis, would give evidence for odd-parity pairing and topological superconductivity. The present and previous finding of possible topological superconductivity in Sn1-xInx Te and CuxBi2Se3 suggests that odd-parity pairing favored by strong spin-orbit coupling is likely to be a common underlying mechanism for materializing topological superconductivity.
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