ar X iv : c on d - m at / 0 30 51 93 v 2 1 3 O ct 2 00 3 Weak magnetism and non - Fermi liquids near heavy - fermion critical points
نویسندگان
چکیده
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.
منابع مشابه
ar X iv : c on d - m at / 0 30 74 20 17 J ul 2 00 3 Non - Fermi liquid normal state of the Heavy Fermion superconductor UBe 13
متن کامل
ar X iv : 0 81 0 . 55 74 v 1 [ he p - ph ] 3 0 O ct 2 00 8 Neutrino Mass Seesaw Version 3
The origin of neutrino mass is usually attributed to a seesaw mechanism, either through a heavy Majorana fermion singlet (version 1) or a heavy scalar triplet (version 2). Recently, the idea of using a heavy Majorana fermion triplet (version 3) has gained some attention. This is a review of the basic idea involved, its U(1) gauge extension, and some recent developments.
متن کاملar X iv : c on d - m at / 9 51 00 95 v 1 1 8 O ct 1 99 5 Metamagnetism and Fermi Surface in the Anderson Lattice Model
We investigate magnetization as functions of external magnetic field H in the U-infinite Anderson lattice model within the leading order approximation in the 1/N-expansion. At T = 0, at H = H M where the Zeeman energy is equal to a certain characteristic energy in the system, the magnetization curve has a kink and the differential susceptibility dM/dH shows a jump. At finite temperature, dM/dH ...
متن کاملar X iv : c on d - m at / 0 51 05 97 v 2 17 J an 2 00 7 Thermoelectric transport near the pair breaking quantum phase transition out of a d - wave superconductor
We study electric, thermal, and thermoelectric conductivities in the vicinity of a z = 2 superconductor-diffusive metal transition in two dimensions, both in the high and low frequency limits. We find violation of the Wiedemann-Franz law and a dc thermoelectric conductivity α that does not vanish at low temperatures, in contrast to Fermi liquids. We introduce a Langevin equation formalism to st...
متن کاملar X iv : c on d - m at / 0 20 91 44 v 3 7 M ay 2 00 3 Fractionalized Fermi liquids
In spatial dimensions d ≥ 2, Kondo lattice models of conduction and local moment electrons can exhibit a fractionalized, non-magnetic state (FL∗) with a Fermi surface of sharp electron-like quasiparticles, enclosing a volume quantized by (ρa − 1)(mod 2), with ρa the mean number of all electrons per unit cell of the ground state. Such states have fractionalized excitations linked to the deconfin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2015