The World's First Genuine Room-Temperature Superconductor: SP2 Spiral Carbon-Based Material YD-550 with Critical Temperature up to 550 K

AbstractThis work systematically reports the discovery of the world's first genuine SP2 spiral carbon-based room-temperature superconductor YD-550 with critical temperature up to 550 K. All high-precision physical property measurements were performed on professional characterization platforms at Shanghai Jiao Tong University and Shanghai University. Zero-field resistance measurements reveal a sharp and reversible high-temperature electrical phase transition jump occurring around 550 K for YD-550. Low-field magnetization measurements show that the ZFC/FC magnetic irreversibility bifurcation fully closes at 550 K under 10 Oe, yielding excellent temperature coincidence between electrical and magnetic phase transitions. When the weak magnetic field increases from 10 Oe to 30 Oe, the sample exhibits counter-intuitive field responses deviating from conventional condensed-matter systems: the magnetic irreversibility region expands toward higher temperatures, and the characteristic phase-transition temperature rises rather than decreases upon moderate weak-field elevation. Under a strong magnetic field of 1 T, a unique magnetic-moment bifurcation reversal emerges: the field-cooled (FC) magnetization upon cooling lies persistently below the zero-field-cooled (ZFC) magnetization upon heating, producing special hysteretic magnetic behavior inaccessible in conventional magnetic materials and classic superconducting systems. Microscopic characterizations demonstrate that YD-550 is dominated by sp²-hybridized carbon structures, with elemental composition ~90 at.% carbon and ~10 at.% oxygen plus trace impurities; no substantial crystalline ferromagnetic or antiferromagnetic secondary phases are detected. The complete set of observed high-temperature coupled electromagnetic phase transitions, anomalous weak-field responses, and high-field bifurcation reversal cannot be explained by superparamagnetism, spin-glass physics, structural phase transitions, or conventional Cooper-pair based Bardeen-Cooper-Schrieffer superconductivity. A hypothetical single-electron superconductivity model is introduced to achieve self-consistent physical matching with all experimental observations. Evidence indicates that the YD-550 system hosts high-temperature electronic phase transitions above 550 K. The low-temperature quantum ground state can be stably maintained at room temperature. This study discloses a new class of high-temperature electromagnetic quantum phase transition phenomena. YD-550 samples can be provided to domestic and international research institutions for independent parallel verification under formal academic non-disclosure agreements; sample preparation protocols remain undisclosed.