Collective Modes and Structural Modulation in Ni-Mn-Ga(Co) Martensite Thin Films Probed by Femtosecond Spectroscopy and Scanning Tunneling Microscopy

M. Schubert; H. Schaefer; J. Mayer; A. Laptev; M. Hettich; M. Merklein; C. He; C. Rummel; O. Ristow; M. Großmann; Y. Luo; V. Gusev; K. Samwer; M. Fonin; T. Dekorsy; J. Demsar

doi:10.1103/PhysRevLett.115.076402

Collective Modes and Structural Modulation in Ni-Mn-Ga(Co) Martensite Thin Films Probed by Femtosecond Spectroscopy and Scanning Tunneling Microscopy

M. Schubert, H. Schaefer, J. Mayer, A. Laptev, M. Hettich, M. Merklein, C. He, C. Rummel, O. Ristow, M. Großmann, Y. Luo, V. Gusev, K. Samwer, M. Fonin, T. Dekorsy, J. Demsar

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摘要

The origin of the martensitic transition in the magnetic shape memory alloy Ni-Mn-Ga has been widely discussed. While several studies suggest it is electronically driven, the adaptive martensite model reproduced the peculiar nonharmonic lattice modulation. We used femtosecond spectroscopy to probe the temperature and doping dependence of collective modes, and scanning tunneling microscopy revealed the corresponding static modulations. We show that the martensitic phase can be described by a complex charge-density wave tuned by magnetic ordering and strong electron-lattice coupling.

源语言	英语
文章编号	076402
期刊	Physical Review Letters
卷	115
期	7
DOI	https://doi.org/10.1103/PhysRevLett.115.076402
出版状态	已出版 - 13 8月 2015
已对外发布	是

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Schubert, M., Schaefer, H., Mayer, J., Laptev, A., Hettich, M., Merklein, M., He, C., Rummel, C., Ristow, O., Großmann, M., Luo, Y., Gusev, V., Samwer, K., Fonin, M., Dekorsy, T., & Demsar, J. (2015). Collective Modes and Structural Modulation in Ni-Mn-Ga(Co) Martensite Thin Films Probed by Femtosecond Spectroscopy and Scanning Tunneling Microscopy. Physical Review Letters, 115(7), 文章 076402. https://doi.org/10.1103/PhysRevLett.115.076402

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title = "Collective Modes and Structural Modulation in Ni-Mn-Ga(Co) Martensite Thin Films Probed by Femtosecond Spectroscopy and Scanning Tunneling Microscopy",

abstract = "The origin of the martensitic transition in the magnetic shape memory alloy Ni-Mn-Ga has been widely discussed. While several studies suggest it is electronically driven, the adaptive martensite model reproduced the peculiar nonharmonic lattice modulation. We used femtosecond spectroscopy to probe the temperature and doping dependence of collective modes, and scanning tunneling microscopy revealed the corresponding static modulations. We show that the martensitic phase can be described by a complex charge-density wave tuned by magnetic ordering and strong electron-lattice coupling.",

author = "M. Schubert and H. Schaefer and J. Mayer and A. Laptev and M. Hettich and M. Merklein and C. He and C. Rummel and O. Ristow and M. Gro{\ss}mann and Y. Luo and V. Gusev and K. Samwer and M. Fonin and T. Dekorsy and J. Demsar",

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doi = "10.1103/PhysRevLett.115.076402",

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Schubert, M, Schaefer, H, Mayer, J, Laptev, A, Hettich, M, Merklein, M, He, C, Rummel, C, Ristow, O, Großmann, M, Luo, Y, Gusev, V, Samwer, K, Fonin, M, Dekorsy, T & Demsar, J 2015, 'Collective Modes and Structural Modulation in Ni-Mn-Ga(Co) Martensite Thin Films Probed by Femtosecond Spectroscopy and Scanning Tunneling Microscopy', Physical Review Letters, 卷 115, 号码 7, 076402. https://doi.org/10.1103/PhysRevLett.115.076402

TY - JOUR

T1 - Collective Modes and Structural Modulation in Ni-Mn-Ga(Co) Martensite Thin Films Probed by Femtosecond Spectroscopy and Scanning Tunneling Microscopy

AU - Schubert, M.

AU - Schaefer, H.

AU - Mayer, J.

AU - Laptev, A.

AU - Hettich, M.

AU - Merklein, M.

AU - He, C.

AU - Rummel, C.

AU - Ristow, O.

AU - Großmann, M.

AU - Luo, Y.

AU - Gusev, V.

AU - Samwer, K.

AU - Fonin, M.

AU - Dekorsy, T.

AU - Demsar, J.

PY - 2015/8/13

Y1 - 2015/8/13

N2 - The origin of the martensitic transition in the magnetic shape memory alloy Ni-Mn-Ga has been widely discussed. While several studies suggest it is electronically driven, the adaptive martensite model reproduced the peculiar nonharmonic lattice modulation. We used femtosecond spectroscopy to probe the temperature and doping dependence of collective modes, and scanning tunneling microscopy revealed the corresponding static modulations. We show that the martensitic phase can be described by a complex charge-density wave tuned by magnetic ordering and strong electron-lattice coupling.

AB - The origin of the martensitic transition in the magnetic shape memory alloy Ni-Mn-Ga has been widely discussed. While several studies suggest it is electronically driven, the adaptive martensite model reproduced the peculiar nonharmonic lattice modulation. We used femtosecond spectroscopy to probe the temperature and doping dependence of collective modes, and scanning tunneling microscopy revealed the corresponding static modulations. We show that the martensitic phase can be described by a complex charge-density wave tuned by magnetic ordering and strong electron-lattice coupling.

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DO - 10.1103/PhysRevLett.115.076402

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SN - 0031-9007

VL - 115

JO - Physical Review Letters

JF - Physical Review Letters

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M1 - 076402

ER -

Collective Modes and Structural Modulation in Ni-Mn-Ga(Co) Martensite Thin Films Probed by Femtosecond Spectroscopy and Scanning Tunneling Microscopy

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