Orbital-selective mott transitions: Heavy fermions and beyond
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Quantum phase transitions in metals are often accompanied by violations of Fermi liquid behavior in the quantum critical regime. Particularly fascinating are transitions beyond the Landau-Ginzburg-Wilson concept of a local order parameter. The breakdown of the Kondo effect in heavy-fermion metals constitutes a prime example of such a transition. Here, the strongly correlated f electrons become localized and disappear from the Fermi surface, implying that the transition is equivalent to an orbital-selective Mott transition, as has been discussed for multi-band transition-metal oxides. In this article, available theoretical descriptions for orbital-selective Mott transitions will be reviewed, with an emphasis on conceptual aspects like the distinction between different low-temperature phases and the structure of the global phase diagram. Selected results for quantum critical properties will be listed as well. Finally, a brief overview is given on experiments which have been interpreted in terms of orbital-selective Mott physics.
Details
Original language | English |
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Pages (from-to) | 203-232 |
Number of pages | 30 |
Journal | Journal of low temperature physics |
Volume | 161 |
Issue number | 1-2 |
Publication status | Published - Oct 2010 |
Peer-reviewed | Yes |
Externally published | Yes |
Keywords
ASJC Scopus subject areas
Keywords
- Heavy fermions, Mott transition, Quantum criticality