Skyrmions and spirals in MnSi under hydrostatic pressure

Bannenberg, L. J.; Sadykov, R.; Dalgliesh, R. M.; Goodway, C.; Schlagel, D. L.; Lograsso, T. A.; Falus, P.; Lelièvre-Berna, E.; Leonov, A. O.; Pappas, C.

doi:10.1103/PhysRevB.100.054447

Title: Skyrmions and spirals in MnSi under hydrostatic pressure

Journal Article · Fri Aug 30 00:00:00 EDT 2019 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.100.054447· OSTI ID:1561962

^[1]; Sadykov, R. ^[2]; Dalgliesh, R. M. ^[3]; Goodway, C. ^[3]; Schlagel, D. L. ^[4]; Lograsso, T. A. ^[4]; Falus, P. ^[5]; Lelièvre-Berna, E. ^[5]; Leonov, A. O. ^[6]; Pappas, C. ^[1]

Delft Univ. of Technology, Delft (The Netherlands)
Russian Academy of Sciences, Moscow (Russia); Russian Academy of Sciences, Troitsk (Russia); National Univ. of Science and Technology MISiS, Moscow (Russia)
Rutherford Appleton Lab., Didcot (United Kingdom)
Ames Lab. and Iowa State Univ., Ames, IA (United States)
Inst. Laue-Langevin, Grenoble (France)
Hiroshima Univ., Hiroshima (Japan)

The archetype cubic chiral magnet MnSi is home to some of the most fascinating states in condensed matter, such as skyrmions and a non-Fermi-liquid behavior in conjunction with a topological Hall effect under hydrostatic pressure. Using small angle neutron scattering, we study the evolution of the helimagnetic, conical, and skyrmionic correlations with increasing hydrostatic pressure. We show that the helical propagation vector smoothly reorients from < 111 > to < 100 > at intermediate pressures. At higher pressures, above the critical pressure, the long-range helimagnetic order disappears at zero magnetic field. Nevertheless, skyrmion lattices and conical spirals form under magnetic fields, in a part of the phase diagram where a topological Hall effect and a non-Fermi-liquid behavior have been reported. These unexpected results shed light on the puzzling behavior of MnSi at high pressures and the mechanisms that destabilize the helimagnetic long-range order at the critical pressure.

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Research Organization:: Ames Lab., Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: 721.012.102; AC02-07CH11358

OSTI ID:: 1561962

Alternate ID(s):: OSTI ID: 1564345

Report Number(s):: IS-J-10027; PRBMDO; TRN: US2000671

Journal Information:: Physical Review B, Vol. 100, Issue 5; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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Dual nature of magnetism in MnSi Yaouanc, A.; de Reotier, P. Dalmas; Roessli, B. arXiv https://doi.org/10.48550/arxiv.1912.01257	text	January 2019

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