Evolution toward Quantum Critical End Point in UGe2
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TLDR
In this paper, Hall resistivity and electrical resistivity measurements under pressure and magnetic field in UGe 2 with ferromagnetic tricriticality were carried out in a large pressure range almost up to the quantum critical end point.Abstract:
We report on Hall resistivity and electrical resistivity measurements under pressure and magnetic field in UGe 2 with ferromagnetic (FM) tricriticality. The Hall resistivity sensitively detects the first order metamagnetic transition from a paramagnetic (PM) phase to a FM phase in a large pressure range almost up to the quantum critical end point (QCEP). The drastic change in the Fermi surface at the PM–FM transition is detected up to the vicinity of the QCEP, while a strong modification in the field variation of the inelastic scattering between electrons is observed toward the QCEP. The comparison with the theoretical predictions is made.read more
Citations
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Ferromagnetism and Superconductivity in Uranium Compounds
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Ferromagnetic quantum critical endpoint in UCoAl
Dai Aoki,Tristan Combier,Valentin Taufour,Tatsuma D. Matsuda,Georg Knebel,Hisashi Kotegawa,Jacques Flouquet +6 more
TL;DR: In this paper, the 1st order metamagnetic transition at H m ∼ 0.7 T from the paramagnetic ground state to the field-induced ferromagnetic state changes to a crossover at finite temperature T 0 ∼11 K.
Journal ArticleDOI
Ferromagnetic Quantum Critical Endpoint in UCoAl
Dai Aoki,Tristan Combier,Valentin Taufour,Tatsuma D. Matsuda,Georg Knebel,Hisashi Kotegawa,Jacques Flouquet +6 more
TL;DR: In this article, resistivity and magnetostriction measurements were performed at high magnetic fields and under pressure on UCoAl, where the 1st order metamagnetic transition at H_m ~ 0.7 T from the paramagnetic ground state to the field-induced ferromagnetic state changes to a crossover at finite temperature T_0 ~ 11 K.
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Heavy fermions in a high magnetic field
TL;DR: In this article, the properties of field-induced magnetic transitions in heavy-fermion materials close to a quantum antiferromagnetic-to-paramagnetic instability are presented.
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Tricritical wings and modulated magnetic phases in LaCrGe3 under pressure.
Udhara S. Kaluarachchi,Udhara S. Kaluarachchi,Sergey L. Bud'ko,Sergey L. Bud'ko,Paul C. Canfield,Paul C. Canfield,Valentin Taufour,Valentin Taufour +7 more
TL;DR: The authors show that LaCrGe3 exhibits a double-wing structure indicating strong similarities with ZrZn2 and UGe2 and also shows modulated magnetic phases similar to CeRuPO in its phase diagram, providing an example of an additional possibility for the phase diagram of metallic quantum ferromagnets.
References
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Superconductivity on the border of itinerant-electron ferromagnetism in UGe2
Siddharth S. Saxena,Siddharth S. Saxena,Siddharth S. Saxena,P. Agarwal,K. Ahilan,F. M. Grosche,R. K. W. Haselwimmer,Markus J. Steiner,Edward N. Pugh,I. R. Walker,Stephen Julian,P. Monthoux,Gilbert G. Lonzarich,Andrew Huxley,I. Sheikin,Daniel Braithwaite,Jacques Flouquet +16 more
TL;DR: The observation of superconductivity on the border of ferromagnetism in a pure system, UGe 2, which is known to be qualitatively similar to the classic d-electron ferromagnets, is reported.
Journal ArticleDOI
Hall-effect evolution across a heavy-fermion quantum critical point.
Silke Paschen,T. Lühmann,Steffen Wirth,Philipp Gegenwart,O. Trovarelli,C. Geibel,Frank Steglich,Piers Coleman,Qimiao Si +8 more
TL;DR: Measurements of the low-temperature Hall coefficient (RH)—a measure of the Fermi surface volume—in the heavy-fermion metal YbRh2Si2 upon field-tuning it from an antiferromagnetic to a paramagnetic state are reported.
Journal ArticleDOI
Magnetic field-tuned quantum criticality in the metallic ruthenate Sr3Ru2O7.
Santiago Andrés Grigera,Santiago Andrés Grigera,Robin Perry,Andrew J. Schofield,May Chiao,Stephen Julian,Gilbert G. Lonzarich,Shinichi Ikeda,Shinichi Ikeda,Yoshiteru Maeno,Andrew J. Millis,Andrew P. Mackenzie,Andrew P. Mackenzie +12 more
TL;DR: It is argued that observations on the itinerant metamagnet Sr3Ru2O7 represent good evidence for a new class of quantum critical point, arising when the critical end point terminating a line of first-order transitions is depressed toward zero temperature.
Journal ArticleDOI
Magnetic-field induced quantum critical point in YbRh2Si2
Philipp Gegenwart,J. Custers,C. Geibel,K. Neumaier,T. Tayama,Kenichi Tenya,O. Trovarelli,Frank Steglich +7 more
TL;DR: Low-temperature calorimetric, magnetic, and resistivity measurements on the antiferromagnetic heavy-fermion metal YbRh( 2)Si(2) ( T(N)=70 mK) as a function of magnetic field B suggest singular scattering at the whole Fermi surface and a divergence of the heavy quasiparticle mass.
Journal ArticleDOI
Non-Fermi-liquid nature of the normal state of itinerant-electron ferromagnets
TL;DR: The results using MnSi reveal a particularly striking combination of properties—most notably a T3/2 power law for the resistivity—showing clearly that the normal state of this itinerant-electron ferromagnet cannot be described in terms of the standard model of metals.