Predictions and Observations of Multiple Slip Modes in Atomic-Scale Friction

Medyanik, Sergey N.; Liu, Wing Kam; Sung, In-Ha; Carpick, Robert W.

doi:10.1103/physrevlett.97.136106

Cited by 139 publications

(139 citation statements)

References 14 publications

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“…Before doing so, in order to get a better insight on the problem we will briefly describe some of the main properties of the system for a perfect lattice ͑⑀ =0͒. 4,6,[8][9][10][11][12][13] For this case, the main results are shown in Fig. 2͑a͒ where we present the friction force as a function of the corrugation potential amplitude U o at small velocity ͑v s =10 nm/ s͒.…”

Section: Surface Disorder Without Temperaturementioning

confidence: 99%

“…In theory, this amplitude can be changed by varying the normal load 10,16 although it is worth noting that a change in the normal load is probably changing other parameters of the system in a nontrivial way. The effect of this disorder is a small change in the potential shape ͑see Fig.…”

Section: Dmentioning

confidence: 99%

“…There, the dynamics is governed by the length of the slip events. 9,10,19 Figure 2͑a͒ shows the friction force as a function of the potential amplitude, U 0 . This curve presents a series of marked discontinuities which correspond to a change in the length of the slip events.…”

Section: Surface Disorder Without Temperaturementioning

confidence: 99%

“…4,8 Most theoretical efforts to describe the force friction microscopy experiments have focused on the behavior of defect free and perfect periodic surfaces with or without the inclusion of thermal effects. [9][10][11][12] However, the study of the effect of substrate disorder or defects on atomic friction is particularly important since atomically flat surfaces represent ideal models and disorder and defects of different kind are always present in nature. Recent results in an one-dimensional model indicate that the presence of surface defects can modify the temperature dependence of friction at atomic scale.…”

Section: Introductionmentioning

confidence: 99%

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Effects of surface disorder and temperature on atomic friction

Fajardo

Mazo

2010

Phys. Rev. B

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We have investigated the effect of surface disorder on atomic friction in the stick-slip dynamical regime of a one-dimensional Prandtl-Tomlinson model. We find that disorder in the substrate potential can modify the mean slip length and then it changes the friction force of the system. In particular, the effect of the disorder is more important at low temperatures and close to dynamical transition points or at high loads. We show results for different values of temperature, amplitude of the corrugation potential, dragging velocity, and damping. Special care is put in the comparison between the results of the regular and the disordered cases at many different temperatures and in the understanding of the combined effect of disorder and temperature in the dynamics of the system. To finish, we present some results on the robustness of the results against a change in the effective damping of the system.

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Section: Surface Disorder Without Temperaturementioning

confidence: 99%

Section: Dmentioning

confidence: 99%

Section: Surface Disorder Without Temperaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of surface disorder and temperature on atomic friction

Fajardo

Mazo

2010

Phys. Rev. B

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“…Transitions between slip regimes for this system have been systematically investigated by Medyanik et al [2] and can be determined by η = 2π 2 U0 a 2 k ef f ; where η < 1 corresponds to smooth sliding, 1 < η < 4.6 to single slip, 4.6 < η < 7.8 to double slip, and so on. In the Note, the authors introduce a new parameter, η 2 = 2π 2 Uo a 2 k (Eq.…”

mentioning

confidence: 99%

Comment on “A Note on the Two-Spring Tomlinson Model”

Dong¹,

Martini

2011

Tribol Lett

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A recent note by Lu et al presented a theoretical study of two-spring Tomlinson model. In this comment we argue that the conclusion of the note can be understood in a simple manner, moreover we point out the discussion of the criterion for the onset of stick-slip in the note is unnecessarily complicated and potentially misleading.A recent Tribology Letters Note reported an analytical study of the two-spring, two-mass Tomlinson model under quasistatic conditions [1]. The main points of that article were (i) the quasistatic solution of the two-spring Tomlinson model is equivalent to the one-spring model provided the effective spring stiffness is correctly defined, and (ii) a criterion for the onset of stick-slip expressed in terms of explicitly defined tip and cantilever stiffness is the most convenient way to study the effects of tip flexibility. In this Comment we show that the first of these points is readily apparent from a simple analysis and the second is supported by results presented in an unnecessarily complicated and potentially misleading manner.We are in agreement with the authors' first conclusion that the quasistatic solution of two-spring model is equivalent to that of the one-spring model (Eq. 20 of [1]). However, this conclusion is straight forward since under quasistatic conditions inertia can be neglected. Regardless of how many masses the system has (consider the n-spring, n-mass system illustrated in Figure 1), it simplifies to a one-spring model with an effective stiffness k ef f satisfying

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The Physics of Atomic-scale Friction: Basic Considerations and Open Questions

Krylov¹,

Frenken²

2014

Surface and Interface Science

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Predictions and Observations of Multiple Slip Modes in Atomic-Scale Friction

Cited by 139 publications

References 14 publications

Effects of surface disorder and temperature on atomic friction

Effects of surface disorder and temperature on atomic friction

Comment on “A Note on the Two-Spring Tomlinson Model”

The Physics of Atomic-scale Friction: Basic Considerations and Open Questions

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