| dc.contributor.author | Ipsita Mandal | |
| dc.contributor.other | Department of Physics, Shiv Nadar Institution of Eminence (SNIoE), Gautam Buddha Nagar, Uttar Pradesh 201314, India; Freiburg Institute for Advanced Studies (FRIAS), University of Freiburg, D-79104 Freiburg, Germany; Correspondence to: Department of Physics, Shiv Nadar Institution of Eminence (SNIoE), Gautam Buddha Nagar, Uttar Pradesh 201314, India. | |
| dc.date.accessioned | 2024-06-15T06:10:28Z | |
| dc.date.accessioned | 2025-10-08T09:17:48Z | |
| dc.date.available | 2025-10-08T09:17:48Z | |
| dc.date.issued | 01-08-2024 | |
| dc.identifier.uri | http://digilib.fisipol.ugm.ac.id/repo/handle/15717717/39817 | |
| dc.description.abstract | We consider the emergence of a non-Fermi liquid fixed point in a two-dimensional metal, at the onset of a quantum phase transition from a Fermi liquid state to an incommensurate charge density wave (CDW) ordered phase. The momentum of the CDW boson is centred at the wavevector Q, which connects a single pair of antipodal points on the Fermi surface with antiparallel tangent vectors. We employ the dimensional regularization technique in which the co-dimension of the Fermi surface is extended to a generic value, while keeping the dimension of the Fermi surface itself fixed at one. Although the system is strongly coupled at dimension d=2, the interactions become marginal at the upper critical dimension d=dc, whose value is found to be 5/2. Using a controlled perturbative expansion in the parameter ϵ=dc−d, we compute the critical exponents of the stable infrared fixed point characterizing the quantum critical point. The scalings of the original theory are determined by setting ϵ=1/2, where the fermion self-energy is seen to scale with the frequency with a fractional power law of 2/3, which is the telltale signature of a typical non-Fermi liquid phase. | |
| dc.language.iso | EN | |
| dc.publisher | Elsevier | |
| dc.subject.lcc | Nuclear and particle physics. Atomic energy. Radioactivity | |
| dc.title | Stable non-Fermi liquid fixed point at the onset of incommensurate 2kF charge density wave order | |
| dc.type | Article | |
| dc.description.doi | 10.1016/j.nuclphysb.2024.116586 | |
| dc.title.journal | Nuclear Physics B | |
| dc.identifier.oai | oai:doaj.org/journal:b992b2018c0043c6be0a838e0c409a2e | |
