Almost localized fermions in a magnetic field: Properties at the metamagnetic transition

Spałek, J.; Korbel, P.; Wójcik, W.

doi:10.1103/physrevb.56.971

Cited by 15 publications

(8 citation statements)

References 9 publications

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“…Metamagnetic behavior is shown to also occur in situations where the Fermi energy lies close to a van Hove singularity [4,5], or where a Pomeranchuk Fermi surface deformation instability occurs [6]. It has been shown by calculations based on the Gutzwiller approximation by Vollhardt [7] and Spalek and coworkers [8][9][10] that for a generic concave density of states metamagnetic behavior is also found in the intermediate coupling regime of the Hubbard model. The metamagnetic scenario is then that of correlated electrons, with a (Mott) localization tendency due to the interaction.…”

Section: Introductionmentioning

confidence: 87%

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Quasiparticle properties of strongly correlated electron systems with itinerant metamagnetic behavior

Bauer

2009

Eur. Phys. J. B

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Abstract.A brief account of the zero temperature magnetic response of a system of strongly correlated electrons in strong magnetic field is given in terms of its quasiparticle properties. The scenario is based on the paramagnetic phase of the half-filled Hubbard model, and the calculations are carried out with the dynamical mean field theory (DMFT) together with the numerical renormalization group (NRG). As well known, in a certain parameter regime one finds a magnetic susceptibility which increases with the field strength. Here, we analyze this metamagnetic response based on Fermi liquid parameters, which can be calculated within the DMFT-NRG procedure. The results indicate that the metamagnetic response can be driven by field-induced effective mass enhancement. However, also the contribution due to quasiparticle interactions can play a significant role. We put our results in context with experimental studies of itinerant metamagnetic materials.

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Section: Introductionmentioning

confidence: 87%

“…The European Physical Journal B to describe itinerant metamagnetism for correlated electrons [2][3][4][5][9][10][11][12] due to its relative formal simplicity. We employ the dynamical mean field theory (DMFT) [11,13] combined with the numerical renormalization group (NRG) [14,15] to solve the effective impurity problem.…”

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confidence: 99%

Quasiparticle properties of strongly correlated electron systems with itinerant metamagnetic behavior

Bauer

2009

Eur. Phys. J. B

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“…At the discontinuity the correlation function hn i" À n i# i jumps to zero. In that situation, the correlated itinerant-electron system represents a statistical spin liquid [17], since the electrons of opposite spin avoid ARTICLE IN PRESS Fig. 5.…”

Section: Spin-dependent Masses: Non-half-filled Band Casementioning

confidence: 98%

Spin-split masses and a critical behavior of almost localized narrow-band and heavy-fermion systems

Spałek

2006

Physica B: Condensed Matter

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“…Here, however, the dHvA frequencies corresponding to different spin orientations are very close to each other, implying quite similar Fermi surfaces. The theoretical prediction that the effective mass is large and spin dependent in an almost localized Fermi liquid close to the metamagnetic transition 40 …”

Section: Discussionmentioning

confidence: 99%

High magnetic field study of CePd2Si2

Sheikin

Gröger

Raymond

et al. 2004

Journal of Magnetism and Magnetic Materials

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The de Haas-van Alphen ͑dHvA͒ effect in the heavy fermion system CePd 2 Si 2 was studied by magnetic torque measurements in magnetic fields up to 28 T at low temperature. A clear magnetic torque anomaly observed at B m ϳ10 T applied along the crystallographic a axis indicates a metamagnetic transition. The transition also manifests itself by a sharp drop of the magnetoresistance at low temperature. The dHvA oscillations observed above the transition reveal six different frequencies in the basal plane with the corresponding effective masses from 6m e to 23m e . Comparison of the angular dependence of the dHvA frequencies with the theoretical band-structure calculations implies that the 4 f electrons are itinerant rather than localized inside a magnetically ordered state. One frequency is split into two close satellites, which most likely originate from the up and down spin bands, whose effective masses differ by a factor of 2. The spin splitting gives rise to an apparent anomalous field dependence of the effective mass obtained from the experiment.

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Almost localized fermions in a magnetic field: Properties at the metamagnetic transition

Cited by 15 publications

References 9 publications

Quasiparticle properties of strongly correlated electron systems with itinerant metamagnetic behavior

Quasiparticle properties of strongly correlated electron systems with itinerant metamagnetic behavior

Spin-split masses and a critical behavior of almost localized narrow-band and heavy-fermion systems

High magnetic field study of CePd2Si2

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