An LLM pipeline with fresh-context sessions and literature calibration produces a publication-grade manuscript with three substantive findings on altermagnetic piezomagnetism from a corpus of 11,083 papers.
Giant spontaneous Kerr effect reveals the defect origin of macroscopic time-reversal symmetry breaking in altermagnetic MnTe
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abstract
Altermagnetism, a recently identified third class of collinear magnetism with spin-split bands and vanishing net magnetization, has emerged in hexagonal \alphaMnTe{} and is regarded as a promising platform for ultrafast, stray-field-free spintronics and for optical readout of spin order at telecommunication wavelengths. Whether the macroscopic symmetry-breaking signatures reported in MnTe, a spontaneous Hall effect and a tiny ``gossamer'' remanent moment, reflect the ideal altermagnetic order or are activated by defects remains an open question. Here we report giant spontaneous Kerr rotations of up to $\pm 1500\microrad$ in \alphaMnTe{} single crystals at the telecommunication wavelength of $1550\,\mathrm{nm}$, onsetting precisely at the N\'eel temperature $\TN = 307\,\mathrm{K}$. In contrast, a stoichiometric insulating \alphaMnTe{} thin film shows no detectable signal. The bulk--film contrast identifies carrier self-doping, rather than the ideal altermagnetic order, as the source of macroscopic magneto-optical response, establishing telecom-wavelength Kerr imaging as a practical readout for altermagnetic spintronics.
years
2026 2representative citing papers
MOKE signals in Ba0.62K0.38BiO3 exhibit history dependence consistent with vortex pinning via Bean's model, with linear training-field response showing no TRS-breaking anomalies.
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Grounded autonomous research: a fault-tolerant LLM pipeline from corpus to manuscript in frontier computational physics
An LLM pipeline with fresh-context sessions and literature calibration produces a publication-grade manuscript with three substantive findings on altermagnetic piezomagnetism from a corpus of 11,083 papers.
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Vortex pinning of Ba$_{0.62}$K$_{0.38}$BiO$_3$ investigated by magneto-optical Kerr-effect and magnetization measurements
MOKE signals in Ba0.62K0.38BiO3 exhibit history dependence consistent with vortex pinning via Bean's model, with linear training-field response showing no TRS-breaking anomalies.