Paper

{
  "raw_xml": "<entry>\n    <id>http://arxiv.org/abs/2603.17710v1</id>\n    <title>Electron-Hole Scattering Dichotomy and Anisotropic Warping in Quasi-Two-Dimensional Fermi Surfaces of UTe2</title>\n    <updated>2026-03-18T13:30:02Z</updated>\n    <link href='https://arxiv.org/abs/2603.17710v1' rel='alternate' type='text/html'/>\n    <link href='https://arxiv.org/pdf/2603.17710v1' rel='related' title='pdf' type='application/pdf'/>\n    <summary>We present a combined experimental and theoretical study of the detailed Fermi-surface (FS) geometry of UTe2, a heavy-fermion superconductor that has recently attracted considerable attention as a promising candidate for spin-triplet pairing. Using angle-dependent magnetoresistance oscillations, a bulk- and low-energy-sensitive transport probe for quasi-two-dimensional (Q2D) electronic structures, we directly determine the in-plane FS geometry. We found that the Q2D FS exhibits a rectangular cross-sectional shape with strongly anisotropic warping, originating from the hybridization of two orthogonal quasi-one-dimensional bands. Through a quantitative comparison between experiment and theoretical calculations, we further reveal a large electron-hole scattering dichotomy: the quasiparticle lifetime on the electron FS is substantially shorter than that on the hole FS. This dichotomy is naturally explained by anisotropic, low-dimensional antiferromagnetic fluctuations, which selectively enhance scattering on the electron FS. This suggests a dominant role of the electron pockets for the emergence of superconductivity. Our results clarify a direct relation between FS geometry, magnetic fluctuations, and momentum-dependent quasiparticle lifetimes, and thus providing a crucial basis for the microscopic understanding of pairing mechanism, and impose stringent constraints on the gap symmetry of spin-triplet superconductivity in UTe2.</summary>\n    <category scheme='http://arxiv.org/schemas/atom' term='cond-mat.supr-con'/>\n    <category scheme='http://arxiv.org/schemas/atom' term='cond-mat.str-el'/>\n    <published>2026-03-18T13:30:02Z</published>\n    <arxiv:comment>21 pages, 4 figures</arxiv:comment>\n    <arxiv:primary_category term='cond-mat.supr-con'/>\n    <author>\n      <name>Motoi Kimata</name>\n    </author>\n    <author>\n      <name>Jun Ishizuka</name>\n    </author>\n    <author>\n      <name>Freya Husstedt</name>\n    </author>\n    <author>\n      <name>Yusei Shimizu</name>\n    </author>\n    <author>\n      <name>Ai Nakamura</name>\n    </author>\n    <author>\n      <name>Dexin Li</name>\n    </author>\n    <author>\n      <name>Yoshiya Homma</name>\n    </author>\n    <author>\n      <name>Atsushi Miyake</name>\n    </author>\n    <author>\n      <name>Yoshinori Haga</name>\n    </author>\n    <author>\n      <name>Hironori Sakai</name>\n    </author>\n    <author>\n      <name>Yoshifumi Tokiwa</name>\n    </author>\n    <author>\n      <name>Shinsaku Kambe</name>\n    </author>\n    <author>\n      <name>Yo Tokunaga</name>\n    </author>\n    <author>\n      <name>Dai Aoki</name>\n    </author>\n    <author>\n      <name>Toni Helm</name>\n    </author>\n    <author>\n      <name>Youichi Yanase</name>\n    </author>\n  </entry>"
}