Evolution of Quasiparticle Properties in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>UGe</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>with Hydrostatic Pressure Studied via the de Haas–van Alphen Effect

Terashima, Taichi; Matsumoto, Takehiko; Terakura, C.; Uji, S.; Kimura, Noriaki; Endo, M.; Komatsubara, T.; Aoki, H.

doi:10.1103/physrevlett.87.166401

Cited by 65 publications

(73 citation statements)

References 22 publications

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“…Thus at high pressures and low temperatures the ferromagnetic and paramagnetic states are divided by the first order type transition whereas at higher temperatures and lower pressures this transition is of the second order. Such type of behavior is typical for MnSi [1][2][3][4], itinerant ferromagnet-superconductor UGe 2 [5][6][7][8][9][10], ZrZn 2 [11]. The same behavior has been established in the ferromagnetic compounds Co(Si 1−x Se x ) 2 [12] and (Sr 1−x Ca x )RuO 3 [4] where the role of governing parameter plays the concentration of Se and Ca correspondingly.…”

Section: Introductionsupporting

confidence: 52%

On the phase diagram of UGe2

Минеев

2011

Comptes Rendus. Physique

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The magneto-elastic mechanism of development of the first order type instability at the phase transition to the ferromagnet state in itinerant ferromagnet-superconductor UGe2 is discussed. The particular property of this material is the precipitous drop of the critical temperature at pressure increase near 14-15 kbar that drastically increases the temperature of the first order instability in respect to the critical temperature. This effect leading to transformation of the second order type transition to the first order one is determined also by the specific heat increase in the temperature interval of the development of critical fluctuations. After performing the necessary calculations and estimations using the parameters characterizing the properties of UGe2 we argue the effectiveness of this mechanism.Comment: 6 page

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Section: Introductionsupporting

confidence: 52%

On the phase diagram of UGe2

Минеев

2011

Comptes Rendus. Physique

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“…[76][77][78] The dHvA experiments under pressure indicate that the corresponding dHvA branches are clearly observed up to P Ã c (in the strongly polarized phase) but are scarcely seen in the pressure region form P Ã c to P c (in the weakly polarized phase). 77,78) This is mainly due to an extremely large cyclotron mass of conduction electrons in the weakly polarized phase, which is expected to be about 100m 0 from the specific heat data under pressure. It is, however, remarkable that new dHvA branches with large cyclotron masses m Ã c ¼ 60m 0 appear clearly in the paramagnetic region, P > P c , and then the conduction electrons are strongly correlated.…”

Section: 70)mentioning

confidence: 99%

Recent Advances in the Magnetism and Superconductivity of Heavy Fermion Systems

et al. 2004

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We present recent advances in the magnetism and superconductivity of rare earth and uranium compounds. Heavy fermions are formed on the basis of the competition between the RKKY interaction and the Kondo effect in these compounds. The application of pressure to these compounds is useful to control the electronic states in the antiferromagnets CeRh 2 Si 2 and CeRhIn 5 , and the ferromagnet UGe 2 . The quadrupole interaction or the quadrupole Kondo effect is found to be responsible for heavy fermions in PrFe 4 P 12 . A rich variety of superconducting properties are demonstrated: superconductivity of CeCoIn 5 and CeRhIn 5 in the vicinity of a quantum critical point, coexistence of ferromagnetism and superconductivity in UGe 2 , and superconductivity based on the quadrupole fluctuations in PrOs 4 Sb 12 , together with the relation between the superconducting transition temperature and the quasi-two dimensionality of the electronic states.

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“…On the other hand, the possibility of a phase transition described by a change in the Fermi surface topology itself has been proposed by Lifshitz. 1 In recent years, such Lifshitz transitions have been discussed as a possible origin of some anomalies in heavy-fermion systems, for example, the phase transition between ferromagnetic phases of UGe 2 under pressure, [2][3][4][5][6][7][8][9][10][11] YbRh 2 Si 2 under a magnetic field, [12][13][14][15][16] and the transition between the antiferromagnetic phases of CeRh 1−x Co x In 5 . 17 Recently, Fermi surface reconstruction in the antiferromagnetic phase of CeRhIn 5 under a magnetic field has also been reported.…”

Section: Introductionmentioning

confidence: 99%

Lifshitz Transitions in Magnetic Phases of the Periodic Anderson Model

Kubo

2015

J. Phys. Soc. Jpn.

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We investigate the reconstruction of a Fermi surface, which is called a Lifshitz transition, in magnetically ordered phases of the periodic Anderson model on a square lattice with a finite Coulomb interaction between f electrons. We apply the variational Monte Carlo method to the model by using the Gutzwiller wavefunctions for the paramagnetic, antiferromagnetic, ferromagnetic, and charge-density-wave states. We find that an antiferromagnetic phase is realized around half-filling and a ferromagnetic phase is realized when the system is far away from half-filling. In both magnetic phases, Lifshitz transitions take place. By analyzing the electronic states, we conclude that the Lifshitz transitions to large ordered-moment states can be regarded as itinerant-localized transitions of the f electrons.

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Evolution of Quasiparticle Properties inUGe2with Hydrostatic Pressure Studied via the de Haas–van Alphen Effect

Cited by 65 publications

References 22 publications

On the phase diagram of UGe2

On the phase diagram of UGe2

Recent Advances in the Magnetism and Superconductivity of Heavy Fermion Systems

Lifshitz Transitions in Magnetic Phases of the Periodic Anderson Model

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