Incommensurate transverse anisotropy induced by disorder and spin-orbit-vibron coupling in Mn 12 acetate

Kyungwha Park; Mark R. Pederson; Tunna Baruah; Noam Bernstein; Jens Kortus; Steven L. Richardson; Enrique Del Barco; Andrew D. Kent; Steve Hill; Naresh S. Dalal

doi:10.1063/1.1847851

Incommensurate transverse anisotropy induced by disorder and spin-orbit-vibron coupling in Mn ₁₂ acetate

Kyungwha Park, Mark R. Pederson, Tunna Baruah, Noam Bernstein, Jens Kortus, Steven L. Richardson, Enrique Del Barco, Andrew D. Kent, Steve Hill, Naresh S. Dalal

Research output: Contribution to journal › Article › peer-review

Abstract

It has been shown within density-functional theory that in Mn12 acetate there are effects due to disorder by solvent molecules and a coupling between vibrational and electronic degrees of freedom. We calculate the in-plane principal axes of the second-order anisotropy caused by the second effect and compare them with those of the fourth-order anisotropy due to the first effect. We find that the two types of the principal axes are not commensurate with each other, which results in a complete quenching of the tunnel-splitting oscillation as a function of an applied transverse field.

Original language	English (US)
Article number	10M505
Journal	Journal of Applied Physics
Volume	97
Issue number	10
DOIs	https://doi.org/10.1063/1.1847851
State	Published - May 15 2005

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General Physics and Astronomy

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10.1063/1.1847851

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@article{ad95509c9ef54adf975fefdb88701b47,

title = "Incommensurate transverse anisotropy induced by disorder and spin-orbit-vibron coupling in Mn 12 acetate",

abstract = "It has been shown within density-functional theory that in Mn12 acetate there are effects due to disorder by solvent molecules and a coupling between vibrational and electronic degrees of freedom. We calculate the in-plane principal axes of the second-order anisotropy caused by the second effect and compare them with those of the fourth-order anisotropy due to the first effect. We find that the two types of the principal axes are not commensurate with each other, which results in a complete quenching of the tunnel-splitting oscillation as a function of an applied transverse field.",

author = "Kyungwha Park and Pederson, {Mark R.} and Tunna Baruah and Noam Bernstein and Jens Kortus and Richardson, {Steven L.} and {Del Barco}, Enrique and Kent, {Andrew D.} and Steve Hill and Dalal, {Naresh S.}",

note = "Funding Information: This work was supported in part by ONR N000140211045, NSF Grant Nos. HRD-0317607, DMR-0103290, DMR-0239481, DMR-0114142, DMR-0315609, and the DoD HPCMO CHSSI program. Two of the authors (A.D.K. and M.R.P.) acknowledge the hospitality of the Aspen Center for Physics where this collaboration was initiated. ",

year = "2005",

month = may,

day = "15",

doi = "10.1063/1.1847851",

language = "English (US)",

volume = "97",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - Incommensurate transverse anisotropy induced by disorder and spin-orbit-vibron coupling in Mn 12 acetate

AU - Park, Kyungwha

AU - Pederson, Mark R.

AU - Baruah, Tunna

AU - Bernstein, Noam

AU - Kortus, Jens

AU - Richardson, Steven L.

AU - Del Barco, Enrique

AU - Kent, Andrew D.

AU - Hill, Steve

AU - Dalal, Naresh S.

N1 - Funding Information: This work was supported in part by ONR N000140211045, NSF Grant Nos. HRD-0317607, DMR-0103290, DMR-0239481, DMR-0114142, DMR-0315609, and the DoD HPCMO CHSSI program. Two of the authors (A.D.K. and M.R.P.) acknowledge the hospitality of the Aspen Center for Physics where this collaboration was initiated.

PY - 2005/5/15

Y1 - 2005/5/15

N2 - It has been shown within density-functional theory that in Mn12 acetate there are effects due to disorder by solvent molecules and a coupling between vibrational and electronic degrees of freedom. We calculate the in-plane principal axes of the second-order anisotropy caused by the second effect and compare them with those of the fourth-order anisotropy due to the first effect. We find that the two types of the principal axes are not commensurate with each other, which results in a complete quenching of the tunnel-splitting oscillation as a function of an applied transverse field.

AB - It has been shown within density-functional theory that in Mn12 acetate there are effects due to disorder by solvent molecules and a coupling between vibrational and electronic degrees of freedom. We calculate the in-plane principal axes of the second-order anisotropy caused by the second effect and compare them with those of the fourth-order anisotropy due to the first effect. We find that the two types of the principal axes are not commensurate with each other, which results in a complete quenching of the tunnel-splitting oscillation as a function of an applied transverse field.

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U2 - 10.1063/1.1847851

DO - 10.1063/1.1847851

M3 - Article

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VL - 97

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 10

M1 - 10M505

ER -

Incommensurate transverse anisotropy induced by disorder and spin-orbit-vibron coupling in Mn ₁₂ acetate

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