Weak magnetism and non-Fermi liquids near heavy-fermion critical points

By T. Senthil, M. Vojta, S. Sachdev. 2003

434 citations recorded by the source corpus.

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.

Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/d8e6ad1fd79dedd8f9ac87b46c903e6bf84a5442

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Condensed Matter Physics

1. S. Hartnoll
2. Andrew Lucas
3. S. Sachdev
4. Brian Swingle
5. Frank Steglich
6. M. Vojta
7. Qimiao Si
8. L. Huijse

In Electronic, Optical and Magnetic Materials

1. S. Hartnoll
2. M. Vojta
3. Frank Steglich
4. Andrew Lucas
5. S. Sachdev
6. Qimiao Si
7. Yochai Werman
8. S. Wirth

Citations in the corpus

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