Integrated-fin gasket for palm cubic-anvil high pressure apparatus

Cheng, Jinguang; Matsubayashi, K.; Nagasaki, Shoko; Hisada, Aya; Hirayama, T.; Hedo, Masato; Kagi, Hiroyuki; Uwatoko, Yoshiya

doi:10.1063/1.4896473

Cited by 73 publications

(54 citation statements)

References 14 publications

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“…For the constant-force apparatus, the pressure was calibrated at room temperature by monitoring the characteristic resistance change of Bismuth (Bi) at 2.55 and 7.7 GPa; 23 for the "Palm" cubicanvil cell, the pressure after clamping was calibrated at low temperatures by monitoring the superconducting transition temperature of lead (Pb). 25 Our first-principles calculations were performed using the all-electron planewave density functional theory code WIEN2K, 26 in an attempt to understand the superconducting state and the potential relevance of magnetism.…”

Section: Methodsmentioning

confidence: 99%

Competition of superconductivity with the structural transition inMo3Sb7

Cheng

Yan

et al. 2016

Phys. Rev. B

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Prior to the superconducting transition at T c ≈ 2.3 K, Mo 3 Sb 7 undergoes a symmetry-lowering, cubic-to-tetragonal structural transition at T s = 53 K. We have monitored the pressure dependence of these two transitions by measuring the resistivity of Mo 3 Sb 7 single crystals under various hydrostatic pressures up to 15 GPa. The application of external pressure enhances T c but suppresses T s until P c ≈ 10 GPa, above which a pressure-induced first order structural transition takes place and is manifested by the phase coexistence in the pressure range 8 ≤ P ≤ 12 GPa. The cubic phase above 12 GPa is also found to be superconducting with a higher T c ≈ 6 K that decreases slightly with further increasing pressure. The variations with pressure of T c and T s satisfy the Bilbro-McMillan equation, i.e. T c n T s 1-n = constant, thus suggesting the competition of superconductivity with the structural transition that has been proposed to be accompanied with a spin-gap formation at T s . This scenario is supported by our first-principles calculations which suggest the possible importance of magnetism that competes with the superconductivity in Mo 3 Sb 7 .

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Section: Methodsmentioning

confidence: 99%

Competition of superconductivity with the structural transition inMo3Sb7

Cheng

Yan

et al. 2016

Phys. Rev. B

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“…However, the pressure and temperature ranges in the previous studies were far from the magnetic QCP. By utilizing the recently developed highpressure techniques [19][20][21][22][23], we have reinvestigated this problem in an extended pressure and temperature range, and surprisingly found that MnP becomes superconducting below T sc ≈ 1 K near the magnetic QCP at P c ≈ 8 GPa. Since the majority of the density of states near the Fermi level for MnP is attributed to the Mn-3d states [24,25], the present discovery makes MnP the first Mn-based superconductor, and the close proximity of SC to a magnetic instability suggests an unconventional pairing mechanism.…”

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confidence: 98%

Pressure Induced Superconductivity on the border of Magnetic Order in MnP

et al. 2015

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We report the discovery of superconductivity on the border of long-range magnetic order in the itinerant-electron helimagnet MnP via the application of high pressure. Superconductivity with T(sc)≈1 K emerges and exists merely near the critical pressure P(c)≈8 GPa, where the long-range magnetic order just vanishes. The present finding makes MnP the first Mn-based superconductor. The close proximity of superconductivity to a magnetic instability suggests an unconventional pairing mechanism. Moreover, the detailed analysis of the normal-state transport properties evidenced non-Fermi-liquid behavior and the dramatic enhancement of the quasiparticle effective mass near P(c) associated with the magnetic quantum fluctuations.

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“…Using this newly developed PCAC, crystal with several times larger than previously used can be measured under highly hydrostatic condition. [17][18][19] The sample is immersed in the liquid PTM (fluorinert) contained in a teflon capsule.…”

Section: Knownmentioning

confidence: 99%

Pressure dependence of the magnetic ground states in MnP

Matsuda

Dissanayake

et al. 2016

Phys. Rev. B

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MnP, a superconductor under pressure, exhibits a ferromagnetic order below TC~290 K followed by a helical order with the spins lying in the ab plane and the helical rotation propagating along the c axis below Ts~50 K at ambient pressure. We performed single crystal neutron diffraction experiments to determine the magnetic ground states under pressure. Both TC and Ts are gradually suppressed with increasing pressure and the helical order disappears at ~1.2 GPa. At intermediate pressures of 1.8 and 2.0 GPa, the ferromagnetic order first develops and changes to a conical or two-phase (ferromagnetic and helical) structure with the propagation along the b axis below a characteristic temperature. At 3.8 GPa, a helical magnetic order appears below 208 K, which hosts the spins in the ac plane and the propagation along the b axis. The period of this b axis modulation is shorter than that at 1.8 GPa. Our results indicate that the magnetic phase in the vicinity of the superconducting phase may have a helical magnetic correlation along the b axis.Comment: 5 pages, 4 figure

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Integrated-fin gasket for palm cubic-anvil high pressure apparatus

Cited by 73 publications

References 14 publications

Competition of superconductivity with the structural transition inMo3Sb7

Competition of superconductivity with the structural transition inMo3Sb7

Pressure Induced Superconductivity on the border of Magnetic Order in MnP

Pressure dependence of the magnetic ground states in MnP

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