Work

Symmetric tensor coupling in holographic mean-field theory: deformed Dirac cones

Year: 2026

Type: article

Abstract: We extend the holographic mean-field theory to rank-two symmetric tensor field as an external source coupled with fermion. We classify the roles of symmetric tensor coupling according to the effect on the spectral density: cone-angle change, squashing, and tilting of the spectral light cones. The over-tilted light cone is also achieved in a generalized prescription, which consistently retains the causality condition. Our results provide agreements between the holographic spectra with those observed in real materials, such as type-II Dirac cones and strained graphene.

Source: The European Physical Journal C

DOI: 10.1140/epjc/s10052-026-16244-4

Authors: Moongul Byun, Taewon Yuk, Sang-Jin Sin

Institutions: Gwangju Institute of Science and Technology, Korea Institute for Advanced Study, Hanyang University

Language: English

Topic: Black Holes and Theoretical Physics

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Research Foundation, National Research Foundation of Korea

Awards: G1724541146, G2943661666, G6460402875, G6638436351