Holographic models with non-minimal interactions produce new quasi-particle spectra that explain pinning peaks as arising from vortex formation due to interaction-induced anomalous magnetic moments.
Character of Matter in Holography: Spin-Orbit Interaction
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abstract
Gauge/Gravity duality as a theory of matter needs a systematic way to characterise a system. We suggest a `dimensional lifting' of the least irrelevant interaction to the bulk theory. As an example, we consider the spin-orbit interaction, which causes magneto-electric interaction term. We show that its lifting is an axionic coupling. We present an exact and analytic solution describing diamagnetic response. Experimental data on annealed graphite shows a remarkable similarity to our theoretical result. We also find an analytic formulas of DC transport coefficients, according to which, the anomalous Hall coefficient interpolates between the coherent metallic regime with $\rho_{xx}^{2}$ and incoherent metallic regime with $\rho_{xx}$ as we increase the disorder parameter $\beta$. The strength of the spin-orbit interaction also interpolates between the two scaling regimes.
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D-instantons induce a gapped topological insulator phase in holographic Weyl semimetals via phase diagrams from D7 brane free energy and non-linear conductivity calculations.
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Interaction induced quasi-particle spectrum and the origin of the pinning peak in holography
Holographic models with non-minimal interactions produce new quasi-particle spectra that explain pinning peaks as arising from vortex formation due to interaction-induced anomalous magnetic moments.
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D-instanton Effects on the Holographic Weyl Semimetals
D-instantons induce a gapped topological insulator phase in holographic Weyl semimetals via phase diagrams from D7 brane free energy and non-linear conductivity calculations.