dc.contributor.authorVegge, Tejs
dc.contributor.authorSethna, James. P.
dc.contributor.authorCheong, Siew Ann
dc.contributor.authorJacobsen, K. W.
dc.contributor.authorMyers, Christopher R.
dc.contributor.authorRalph, Daniel C.
dc.identifier.citationVegge, T., Sethna, J. P., Cheong, S. A., Jacobsen, K. W., Myers, C. R., & Ralph, D. C. (2001). Calculation of quantum tunneling for a spatially extended defect : the dislocation kink in copper has a low effective mass. Physical Review Letters, 86(8), 1546-1549.en_US
dc.description.abstractSeveral experiments indicate that there are atomic tunneling defects in plastically deformed metals. How this is possible has not been clear, given the large mass of the metal atoms. Using a classical molecular-dynamics calculation, we determine the structures, energy barriers, effective masses, and quantum tunneling rates for dislocation kinks and jogs in copper screw dislocations. We find that jogs are unlikely to tunnel, but the kinks should have large quantum fluctuations. The kink motion involves hundreds of atoms each shifting a tiny amount, leading to a small effective mass and tunneling barrier.en_US
dc.format.extent4 p.en_US
dc.relation.ispartofseriesPhysical review lettersen_US
dc.rightsPhysical Review Letters. © 2001 The American Physical Society. The journal's website is located at http://www.aps.org/en_US
dc.subjectDRNTU::Science::Physics::Atomic physics::Solid state physics
dc.titleCalculation of quantum tunneling for a spatially extended defect : the dislocation kink in copper has a low effective massen_US
dc.typeJournal Article
dc.description.versionPublished versionen_US

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