Hidden magnetic order within the pressure induced superconducting dome of UTe2

Abstract

Unconventional superconductivity typically occurs near magnetic instabilities, and the corresponding spin fluctuations are widely believed to play a crucial role in mediating electron pairing. UTe₂ is a promising candidate for exhibiting multiple spin-triplet superconducting phases when tuning with applied pressure and magnetic fields, but the nature of the magnetism driving these unconventional pairing states is undetermined. Our measurements of UTe₂ under applied pressures and magnetic fields reveal the presence of a magnetic order hidden within the pressure-induced superconducting dome, which vanishes together with the superconductivity once there is sufficiently high pressure to induce the three-dimensional antiferromagnetic phase. Extrapolation of the phase boundary of the hidden magnetic order, which is most likely antiferromagnetic in nature, points to a zero-temperature quantum critical point that coincides with the maximum transition temperature of the pressure-induced superconducting dome, suggesting that it could corresponds to the parent magnetic phase of the critical antiferromagnetic spin fluctuations driving the triplet superconductivity. These findings advance the understanding of the interplay of magnetism and superconductivity in an exemplar candidate triplet superconductor, which is necessary for revealing the microscopic origin of the different unconventional superconducting phases.

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Cite

BibTeX RIS

BibTeX

@misc{ye2026hidden,
  title = {{Hidden magnetic order within the pressure induced superconducting dome of UTe2}},
  author = {Kaixin Ye and Lubin Wang and Dengpeng Yuan and Binbin Zhang and Yanan Zhang and Ye Chen and Yu Liu and Xin Lu and Chaofan Zhang and Qiuyun Chen and Shiyong Tan and Frank Steglich and Lin Jiao and Michael Smidman and Huiqiu Yuan},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.29168},
  eprint = {2609.29168},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.29168},
}

RIS

TY  - UNPB
TI  - Hidden magnetic order within the pressure induced superconducting dome of UTe2
AU  - Kaixin Ye
AU  - Lubin Wang
AU  - Dengpeng Yuan
AU  - Binbin Zhang
AU  - Yanan Zhang
AU  - Ye Chen
AU  - Yu Liu
AU  - Xin Lu
AU  - Chaofan Zhang
AU  - Qiuyun Chen
AU  - Shiyong Tan
AU  - Frank Steglich
AU  - Lin Jiao
AU  - Michael Smidman
AU  - Huiqiu Yuan
PY  - 2026
DA  - 2026/09/24
PB  - arXiv
DO  - 10.48550/arxiv.2609.29168
UR  - https://arxiv.org/abs/2609.29168
AB  - Unconventional superconductivity typically occurs near magnetic instabilities, and the corresponding spin fluctuations are widely believed to play a crucial role in mediating electron pairing. UTe_2 is a promising candidate for exhibiting multiple spin-triplet superconducting phases when tuning with applied pressure and magnetic fields, but the nature of the magnetism driving these unconventional pairing states is undetermined. Our measurements of UTe_2 under applied pressures and magnetic fields reveal the presence of a magnetic order hidden within the pressure-induced superconducting dome, which vanishes together with the superconductivity once there is sufficiently high pressure to induce the three-dimensional antiferromagnetic phase. Extrapolation of the phase boundary of the hidden magnetic order, which is most likely antiferromagnetic in nature, points to a zero-temperature quantum critical point that coincides with the maximum transition temperature of the pressure-induced superconducting dome, suggesting that it could corresponds to the parent magnetic phase of the critical antiferromagnetic spin fluctuations driving the triplet superconductivity. These findings advance the understanding of the interplay of magnetism and superconductivity in an exemplar candidate triplet superconductor, which is necessary for revealing the microscopic origin of the different unconventional superconducting phases.
ER  -

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