000151699 001__ 151699
000151699 005__ 20251107103407.0
000151699 0247_ $$2doi$$a10.1103/PhysRevMaterials.8.016001
000151699 0248_ $$2sideral$$a143296
000151699 037__ $$aART-2024-143296
000151699 041__ $$aeng
000151699 100__ $$aHanakata, Paul Z.
000151699 245__ $$aVibrations and transitions across barrier of strained nanoribbons at finite temperature
000151699 260__ $$c2024
000151699 5060_ $$aAccess copy available to the general public$$fUnrestricted
000151699 5203_ $$aCrystalline sheets (e.g., graphene and transition metal dichalcogenides) liberated from a substrate are a paradigm for materials at criticality, because flexural phonons can fluctuate into the third dimension. Although studies of static critical behaviors (e.g., the scale-dependent elastic constants) are plentiful, investigations of dynamics remain limited. Here, we use molecular dynamics to study the time dependence of the midpoint (the height center of mass) of doubly clamped nanoribbons, as prototypical graphene resonators, under a wide range of temperature and strain conditions. By treating the ribbon midpoint as a Brownian particle confined to a nonlinear potential (which assumes a double-well shape beyond the buckling transition), we formulate an effective theory describing the ribbon's transition rate across the two wells and its oscillations inside a given well. We find that, for nanoribbbons compressed above the Euler buckling point and thermalized above a temperature at which the nonlinear effects due to thermal fluctuations become significant, the exponential term (the ratio between energy barrier and temperature) depends only on the geometry but not the temperature, unlike the usual Arrhenius behavior. Moreover, we find that the natural oscillation time for small strain shows a nontrivial scaling o∼ 0−/4, with 0 being the ribbon length, =2−/2 being the dynamic critical exponent, =0.8 being the scaling exponent describing scale-dependent elastic constants, and being the temperature. These unusual scale- and temperature-dependent dynamics thus exhibit dynamic criticality and could be exploited in the development of graphene-based nanoactuators.
000151699 536__ $$9info:eu-repo/grantAgreement/ES/MINECO-AEI-FEDER/PGC2018-094684-B-C21
000151699 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000151699 590__ $$a3.4$$b2024
000151699 592__ $$a0.945$$b2024
000151699 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b224 / 460 = 0.487$$c2024$$dQ2$$eT2
000151699 593__ $$aPhysics and Astronomy (miscellaneous)$$c2024$$dQ1
000151699 593__ $$aMaterials Science (miscellaneous)$$c2024$$dQ1
000151699 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000151699 700__ $$aBhabesh, Sourav S.
000151699 700__ $$0(orcid)0000-0001-7276-2942$$aYllanes, David
000151699 700__ $$aNelson, David R.
000151699 700__ $$aBowick, Mark J.
000151699 773__ $$g8, 1 (2024), 016001 [14 pp.]$$pPhys. rev. mater.$$tPHYSICAL REVIEW MATERIALS$$x2475-9953
000151699 8564_ $$s1365855$$uhttps://zaguan.unizar.es/record/151699/files/texto_completo.pdf$$yPostprint
000151699 8564_ $$s3163905$$uhttps://zaguan.unizar.es/record/151699/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000151699 909CO $$ooai:zaguan.unizar.es:151699$$particulos$$pdriver
000151699 951__ $$a2025-11-07-10:32:18
000151699 980__ $$aARTICLE