Weak magnetism and non-Fermi liquids near heavy-fermion critical points
| dc.creator | Senthil, T. | |
| dc.creator | Vojta, Matthias | |
| dc.creator | Sachdev, Subir | |
| dc.date | 2003-05-08 | |
| dc.date | 2003-10-13 | |
| dc.date.accessioned | 2026-07-07T02:51:15Z | |
| dc.date.available | 2026-07-07T02:51:15Z | |
| dc.description | This paper is concerned with the weak-moment magnetism in heavy-fermion materials and its relation to the non-Fermi liquid physics observed near the transition to the Fermi liquid. We explore the hypothesis that the primary fluctuations responsible for the non-Fermi liquid physics are those associated with the destruction of the large Fermi surface of the Fermi liquid. Magnetism is suggested to be a low-energy instability of the resulting small Fermi surface state. A concrete realization of this picture is provided by a fractionalized Fermi liquid state which has a small Fermi surface of conduction electrons, but also has other exotic excitations with interactions described by a gauge theory in its deconfined phase. Of particular interest is a three-dimensional fractionalized Fermi liquid with a spinon Fermi surface and a U(1) gauge structure. A direct second-order transition from this state to the conventional Fermi liquid is possible and involves a jump in the electron Fermi surface volume. The critical point displays non-Fermi liquid behavior. A magnetic phase may develop from a spin density wave instability of the spinon Fermi surface. This exotic magnetic metal may have a weak ordered moment although the local moments do not participate in the Fermi surface. Experimental signatures of this phase and implications for heavy-fermion systems are discussed. | |
| dc.description | 20 pages, 8 figures; (v2) includes expanded discussion and solution of quantum Boltzmann equation | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0305193 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0305193 | |
| dc.identifier | Physical Review B 69, 035111 (2004) | |
| dc.identifier | doi:10.1103/PhysRevB.69.035111 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/21385 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Weak magnetism and non-Fermi liquids near heavy-fermion critical points | |
| dc.type | text |