Massive Dirac fermions from holography
| Autor: | Plantz, N. W. M., Flórez, F. García, Stoof, H. T. C. |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Journal of High Energy Physics 4, 123 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/JHEP04(2018)123 |
| Popis: | We provide a framework to compute the dynamics of massive Dirac fermions using holography. To this end we consider two bulk Dirac fermions that are coupled via a Yukawa interaction and propagate on a gravitational background in which a mass deformation is introduced. Moreover, we discuss the incorporation of this approach in semiholography. The resulting undoped fermionic spectral functions indeed show that the Yukawa coupling induces a gap in the holographic spectrum, whereas the semiholographic extension is in general gapped but additionally contains a quantum critical point at which the effective fermion mass vanishes and a topological phase transition occurs. Furthermore, when introducing doping, the fermionic spectral functions show a quantum phase transition between a gapped material and a Fermi liquid. Comment: 34 pages, 13 figures, v2: published version & minor corrections |
| Databáze: | arXiv |
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