Unveiling Resilient Superconducting Fluctuations in Atomically Thin NbSe2 through Higgs Mode Spectroscopy
Yu Du, Gan Liu, Wei Ruan, Zhi Fang, Kenji Watanabe, Takashi Taniguchi, Ronghua Liu, Jian-Xin Li, Xiaoxiang Xi
DOI 10.1103/PhysRevLett.134.066002 · Physical Review Letters
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Abstract
We report a combined electrical transport and optical study of the superconductivity in atomically thin NbSe2. When subjected to an out-of-plane magnetic field, an anomalous metallic state emerges, characterized by a finite longitudinal resistance and a vanishing Hall resistance, suggesting the presence of particle-hole symmetry. We establish a superconducting Higgs mode in atomically thin samples, which reveals enduring superconducting fluctuations that withstand unexpectedly high reduced magnetic fields. These findings provide evidence of robust locally paired electrons in the anomalous metallic state, affirming its bosonic nature.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.8 | Pressure not reported | midpoint |
| NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.8 | Pressure not reported | midpoint |
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