Affiliation:
1. Department of Advanced Materials Science, University of Tokyo, Chiba 277-8561, Japan
Abstract
Significance
The notion of the quantum critical point (QCP) is at the core of modern condensed matter physics. Near a QCP of the symmetry-breaking order, associated quantum-mechanical fluctuations are intensified, which can lead to unconventional superconductivity. Indeed, dome-shaped superconducting phases are often observed near the magnetic QCPs, which supports the spin fluctuation–driven superconductivity. However, the fundamental question remains as to whether a nonmagnetic QCP of electronic nematic order characterized by spontaneous rotational symmetry breaking can promote superconductivity in real materials. Here, we provide an experimental demonstration that a pure nematic QCP exists near the center of a superconducting dome in nonmagnetic FeSe
1
−
x
Te
x
. This result evidences that nematic fluctuations enhanced around the nematic QCP can boost superconductivity.
Funder
MEXT | Japan Society for the Promotion of Science
MEXT | JST | Core Research for Evolutional Science and Technology
Publisher
Proceedings of the National Academy of Sciences
Cited by
21 articles.
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