Paper

{
  "raw_xml": "<entry>\n    <id>http://arxiv.org/abs/2602.17666v1</id>\n    <title>Anisotropic marginal Fermi liquid for Coulomb interacting generalized Weyl fermions</title>\n    <updated>2026-02-19T18:59:55Z</updated>\n    <link href='https://arxiv.org/abs/2602.17666v1' rel='alternate' type='text/html'/>\n    <link href='https://arxiv.org/pdf/2602.17666v1' rel='related' title='pdf' type='application/pdf'/>\n    <summary>Owing to the power-law anisotropy in the quasiparticle dispersion, yielding an enhanced density of states, the effects of long range Coulomb interaction get amplified in three-dimensional generalized Weyl semimetals, characterized by integer monopole charge $n&gt;1$ of the underlying Weyl nodes. Using a Wilsonian renormalization group approach controlled by a large-$N$ expansion with $N$ as the number of Weyl fermion flavors and a gauge-consistent regularization fixed by the Ward-Takahashi identity, we uncover for $n\\ge 2$ an extended interaction-dominated scaling regime with intrinsically anisotropic dynamic Coulomb screening, a finite fermionic anomalous dimension, and a power-law suppression of the quasiparticle residue, yielding an \\emph{anisotropic} marginal non-Fermi liquid at intermediate energies. Ultimately, the effective fine structure constant flows to zero, albeit only logarithmically slowly, so the marginal Fermi liquid phenomenology emerges as a broad crossover, controlled by a slowly running coupling. By contrast, for $n=1$ the system retains an isotropic marginal Weyl-liquid character. These predictions can be tested via scaling in thermodynamics (specific heat and compressibility), direction-dependent optical conductivity, and by anisotropic broadening of the single-particle spectral function in angle-resolved photoemission spectroscopy.</summary>\n    <category scheme='http://arxiv.org/schemas/atom' term='cond-mat.str-el'/>\n    <category scheme='http://arxiv.org/schemas/atom' term='cond-mat.mes-hall'/>\n    <category scheme='http://arxiv.org/schemas/atom' term='hep-th'/>\n    <published>2026-02-19T18:59:55Z</published>\n    <arxiv:comment>6 pages, no figures, SM as ancillary file</arxiv:comment>\n    <arxiv:primary_category term='cond-mat.str-el'/>\n    <author>\n      <name>Gabriel Malavé</name>\n    </author>\n    <author>\n      <name>Rodrigo Soto-Garrido</name>\n    </author>\n    <author>\n      <name>Bitan Roy</name>\n    </author>\n    <author>\n      <name>Vladimir Juričić</name>\n    </author>\n  </entry>"
}