Pressure dependence of the magnetic ground states in MnP

Matsuda, M.; Ye, Feng; Dissanayake, Sachith; Cheng, Jinguang; Chi, Songxue; Ma, Jie; Zhou, H. D.; Yan, Jiaqiang; Kasamatsu, Shusuke; Sugino, Osamu; Katô, Takeo; Matsubayashi, Kazuyuki; Okada, Taku; Uwatoko, Yoshiya

doi:10.1103/physrevb.93.100405

Cited by 43 publications

(61 citation statements)

References 25 publications

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“…1(a)] as found in UGe 2 [8,9] and ZrZn 2 [10]. A PM-FM QCP can also be avoided by the appearance of an antiferromagnetic (AFM) ordered state under p near the putative QCP, as actually observed in CeRuPO [12,13] and MnP [14,15]. In this case, no wing structure has been reported and the AFM state is suppressed by the application of moderate H, as schematically shown in Fig.…”

Section: Introductionmentioning

confidence: 71%

Magnetic fluctuations in the itinerant ferromagnet LaCrGe3 studied by La139 NMR

et al. 2019

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LaCrGe3 is an itinerant ferromagnet with a Curie temperature of Tc = 85 K and exhibits an avoided ferromagnetic quantum critical point under pressure through a modulated antiferromagnetic phase as well as tri-critical wing structure in its temperature-pressure-magnetic field (T -p-H) phase diagram. In order to understand the static and dynamical magnetic properties of LaCrGe3, we carried out 139 La nuclear magnetic resonance (NMR) measurements. Based on the analysis of NMR data, using the self-consistent-renomalization (SCR) theory, the spin fluctuations in the paramagnetic state are revealed to be isotropic ferromagnetic and three dimensional (3D) in nature. Moreover, the system is found to follow the generalized Rhodes-Wohfarth relation which is expected in 3D itinerant ferromagnetic systems. As compared to other similar itinerant ferromagnets, the Cr 3d electrons and their spin fluctuations are characterized to have a relatively high degree of localization in real space.PACS numbers:

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Section: Introductionmentioning

confidence: 71%

Magnetic fluctuations in the itinerant ferromagnet LaCrGe3 studied by La139 NMR

et al. 2019

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“…One peculiarity of the clean FM systems studied so far is that the nature of the paramagnetic-ferromagnetic (PM-FM) phase transition always changes before being suppressed to zero temperature 5 : in most cases, the transition becomes of the first order 6 – 11 . Recently, another possibility, where a modulated magnetic phase (AFM Q ) appears (spin-density wave, antiferromagnetic order), has been observed in CeRuPO 12 , 13 , MnP 14 , 15 , and LaCrGe 3 16 .…”

Section: Introductionmentioning

confidence: 99%

Tricritical wings and modulated magnetic phases in LaCrGe3 under pressure

et al. 2017

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Experimental and theoretical investigations on itinerant ferromagnetic systems under pressure have shown that ferromagnetic quantum criticality is avoided either by a change of the transition order, becoming of the first order at a tricritical point, or by the appearance of modulated magnetic phases. In the first case, the application of a magnetic field reveals a wing-structure phase diagram as seen in itinerant ferromagnets such as ZrZn2 and UGe2. In the second case, no tricritical wings have been observed so far. Here, we report on the discovery of wing-structure as well as the appearance of modulated magnetic phases in the temperature-pressure-magnetic field phase diagram of LaCrGe3. Our investigation of LaCrGe3 reveals a double-wing structure indicating strong similarities with ZrZn2 and UGe2. But, unlike these simpler systems, LaCrGe3 also shows modulated magnetic phases similar to CeRuPO. This finding provides an example of an additional possibility for the phase diagram of metallic quantum ferromagnets.

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“…As the first manganese-based superconductor, MnP has a helimagnetic ground state at ambient pressure. Gradually applying pressure on good single crystals first destroys the helimagnetic order at about 1.2 GPa and then yields a second helimagnetic phase at higher pressures as revealed very recently by synchrotron-based magnetic X-ray diffraction techniques, neutron diffraction, muon-spin rotation and nuclear magnetic resonance (NMR) [4][5][6][7][8][9] . Near the critical pressure of 7.8 GPa, where the second helimagnetic phase is also suppressed, superconductivity emerges with T c ≈ 1 K. Above T c , the resistivity exhibits non-Fermi liquid behavior and reveals a dramatic enhancement of the quasiparticle effective mass at low temperatures in the normal state, suggesting an unconventional pairing mechanism for the observed superconductivity at the border of the helimagnetic phase 3 .…”

Section: Introductionmentioning

confidence: 99%

Orbital-dependent charge dynamics in MnP revealed by optical study

Zheng

et al. 2017

Sci Rep

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Unconventional superconductivity often emerges at the border of long-range magnetic orders. Understanding the low-energy charge dynamics may provide crucial information on the formation of superconductivity. Here we report the unpolarized/polarized optical conductivity study of high quality MnP single crystals at ambient pressure. Our data reveal two types of charge carriers with very different lifetimes. In combination with the first-principles calculations, we show that the short-lifetime carriers have flat Fermi sheets which become gapped in the helimagnetic phase, causing a dramatic change in the low-frequency optical spectra, while the long-lifetime carriers are anisotropic three-dimensional like which are little affected by the magnetic transitions and provide major contributions to the transport properties. This orbital-dependent charge dynamics originates from the special crystal structure of MnP and may have an influence on the unconventional superconductivity and its interplay with helimagnetism at high pressures.

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Pressure dependence of the magnetic ground states in MnP

Cited by 43 publications

References 25 publications

Magnetic fluctuations in the itinerant ferromagnet LaCrGe3 studied by La139 NMR

Magnetic fluctuations in the itinerant ferromagnet LaCrGe3 studied by La139 NMR

Tricritical wings and modulated magnetic phases in LaCrGe3 under pressure

Orbital-dependent charge dynamics in MnP revealed by optical study

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