U(1) quantum spin liquids in dipolar-octupolar pyrochlore magnets: a fermionic parton approach

2023/12/05 by Krushna Chandra Sahu, Sahu, Krushna Chandra, Sambuddha Sanyal +1
Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Quantum many-body systems #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.2312.03106

openalex publication_date 2023/12/05 · openalex created_date 2023/12/08 · openalex updated_date 2026/07/28

Abstract

We study the uniform U(1) quantum spin liquid (QSL) with low-energy fermionic quasiparticles for pyrochlore magnets with dipolar-octupolar symmetry, employing a fermionic parton mean field theory approach. Self-consistent calculations stabilize 12 fully symmetric uniform U(1) QSLs; of which four mean-field states are "monopole-flux" states. Several of these mean-field states show a linear temperature dependence of specific heat at low temperatures; the other phases show a power law temperature dependence of specific heat C ∼ T^α, where α is close to 1. We further compute the dynamic spin structure factors and discuss the possible signature of these fermionic spinons in neutron-scattering experiments on DO magnetic systems. Our results provide a possible way to understand the metallic specific heat response in Nd₂ Sc Nb O₇.

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