Pressure Induced Superconductivity on the border of Magnetic Order in MnP

Cheng, Jinguang; Matsubayashi, Kazuyuki; Wu, Wei; Sun, J. P.; Lin, F. K.; Luo, Jianlin; Uwatoko, Yoshiya

doi:10.1103/physrevlett.114.117001

Cited by 173 publications

(198 citation statements)

References 25 publications

(32 reference statements)

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“…It resembles the one reported in Ref. 4, with, however, some important differences. Firstly, the transition temperature of the FM state changes quite monotonically with pressure without a pronounced dT c /dp slope change at p ∼ 2 GPa.…”

Section: 7supporting

confidence: 54%

“…4 In a narrow pressure region close to a critical pressure p c , at which the new magnetic phase disappears, superconductivity is found below 1 K. It was suggested, there is a quantum critical point at p = p c and that the quantum fluctuations persisting above p c give rise to occurrence of superconductivity. 4 Therefore, it is important to characterize the high-pressure (HP) magnetic state of MnP from which superconductivity emerges. At present, there are three reports based on the results of non-resonant xray, NMR, and neutron diffraction experiments pointing to a helical magnetic order.…”

Section: 9mentioning

confidence: 99%

“…[1][2][3][4] The helical magnet CrAs becomes superconducting for pressures exceeding p 0.4 GPa, whereas MnP possesses a critical pressure p c 8 GPa at which magnetism disappears and superconductivity sets in. For CrAs, in the pressure range of 0.4 p 0.7 GPa, one observes a phase separation between magnetic and paramagnetic volumes, with the latter becoming superconducting with a critical temperature T c 2 K. Above 0.7 GPa the helical magnetic order vanishes and superconductivity below T c sets in within the whole sample volume.…”

mentioning

confidence: 99%

“…In comparison to CrAs, MnP possesses a more complicated phase diagram. 4 At ambient pressure, MnP orders ferromagnetically at T 290 K with the Mn magnetic moments aligned along the crystallographic b−direction (according to the crystallographic group P nma 62 with lattice constants c > a > b).…”

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confidence: 99%

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High-pressure magnetic state of MnP probed by means of muon-spin rotation

et al. 2016

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We report a detailed µSR study of the pressure evolution of the magnetic order in the manganese based pnictide MnP, which has been recently found to undergo a superconducting transition under pressure once the magnetic ground state is suppressed. Using the muon as a volume sensitive local magnetic probe, we identify a ferromagnetic state as well as two incommensurate helical states (with propagation vectors Q aligned along the crystallographic c− and b−directions, respectively) which transform into each other through first order phase transitions as a function of pressure and temperature. Our data appear to support that the magnetic state from which superconductivity develops at higher pressures is an incommensurate helical phase.

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Section: 7supporting

confidence: 54%

Section: 9mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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High-pressure magnetic state of MnP probed by means of muon-spin rotation

et al. 2016

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“…In the same way as pressure can initially decrease the freezing point of water, physicist have been able to use pressure to decrease the Curie temperature to absolute zero temperature, leading to a quantum phase transition. Surprisingly, a variety of unconventional properties have been unveiled near the ferromagnetic quantum phase transition [1], including superconductivity [2][3][4][5], non-Fermi liquid behavior [6], tri-criticality [5,[7][8][9][10], and complex magnetic structures [11][12][13][14][15][16].…”

mentioning

confidence: 99%

Ferromagnetic quantum criticality: New aspects from the phase diagram of LaCrGe3

Taufour

Kaluarachchi

Bud’ko

et al. 2018

Physica B: Condensed Matter

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Recent theoretical and experimental studies have shown that ferromagnetic quantum criticality is always avoided in clean systems. Two possibilities have been identified. In the first scenario, the ferromagnetic transition becomes of the first order at a tricritical point before being suppressed. A wing structure phase diagram is observed indicating the possibility of a new type of quantum critical point under magnetic field. In a second scenario, a transition to a modulated magnetic phase occurs. Our recent studies on the compound LaCrGe 3 illustrate a third scenario where not only a new magnetic phase occurs, but also a change of order of the transition at a tricritical point leading to a wing-structure phase diagram. Careful experimental study of the phase diagram near the tricritical point also illustrates new rules near this type of point.

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Modulations in Superconductors: Probes of Underlying Physics

et al. 2023

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development of various modulations techniques, breakthroughs in quantum materials are achieved, such as the quantum anomalous Hall effect (AHE) in topological insulators, [1][2][3][4] gate-tuned roomtemperature ferromagnetism in 2D van der Waals materials, [5][6][7][8] and emergent magnetic monopoles in artificial spin ice. [9] Especially, as the quantum materials of particular interest with zero dissipation, superconductors have been intensively studied with advanced modulations, aiming to reveal a plethora of emergent phenomena in condensed matter physics, such as superconductor-to-insulator transitions (SIT), [10][11][12] intermediate bosonic metallic state, [13] Bose-Einstein condensation (BEC)-Bardeen-Cooper-Schrieffer (BCS) crossover, [14,15] and intertwined orders, [16][17][18] as well as to develop applications in quantum computing [19][20][21] and ultrasensitive detections. [22][23][24] The superconductivity composes of two ingredients, including the Cooper pairs, each formed by two electrons, and phase coherence among Cooper pairs. [25] Superconductors such as metals and alloys are in the weak-coupling regime, which is well understood by BCS theory. [26,27] However, the later discovered superconductors, including cuprates, iron-based superconductors, and heavy-fermion superconductors, are strongly correlated systems, where a widely accepted microscopic mechanism yet remains absent. Therefore, various modulations have been utilized for the ultimate understanding of these superconductors and routines for room temperature superconductivity. Traditional modulations, such as elemental substitution, annealing, and polarization-induced gating are usually accompanied by some severe problems, including discontinuity, disorders, and limited ranges. Recently, state-of-the-art techniques have been developed with improved convenience, increased capability, and unprecedented dimensionalities, enabling more thorough investigations of unconventional superconductors.As a manifestation, we take some examples discussed in this review in advance. The carrier density can be tuned more conveniently and continuously. The techniques of ionic field-effect transistor (iFET) and electric double-layer transistor (EDLT) surpass conventional methods limited by solid solubility or dielectric breakdown, which enables the more precise phase diagram and detailed scaling analysis at the quantum phaseThe importance of modulations is elevated to an unprecedented level, due to the delicate conditions required to bring out exotic phenomena in quantum materials, such as topological materials, magnetic materials, and superconductors. Recently, state-of-the-art modulation techniques in material science, such as electric-double-layer transistor, piezoelectric-based strain apparatus, angle twisting, and nanofabrication, have been utilized in superconductors. They not only efficiently increase the tuning capability to the broader ranges but also extend the tuning dimensionality to unprecedented degrees of freedom, including quantum fluctuations of...

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Pressure Induced Superconductivity on the border of Magnetic Order in MnP

Cited by 173 publications

References 25 publications

High-pressure magnetic state of MnP probed by means of muon-spin rotation

High-pressure magnetic state of MnP probed by means of muon-spin rotation

Ferromagnetic quantum criticality: New aspects from the phase diagram of LaCrGe3

Modulations in Superconductors: Probes of Underlying Physics

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