<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">C</mml:mi><mml:mn>60</mml:mn></mml:msub></mml:math>-induced Devil's Staircase transformation on a Pb/Si(111) wetting layer

Wang, Lin Lin; Johnson, Duane D.; Tringides, Michael C.

doi:10.1103/physrevb.92.245405

Cited by 5 publications

(3 citation statements)

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“…In order to investigate what effect nanoscale cracks would have on the resistance of a film, we performed a numerical simulation using a percolation model [42][43][44] that allows for cracks to form. The model presented models the resistance characteristics of a resistor network in a purely classical framework.…”

Section: Resultsmentioning

confidence: 99%

“…Memory limitations prevented us from scaling the simulation further. However, this is more than sufficient to see smoothing in the R versus T as in macroscopic samples, rather than the avalanche behavior seen in micron scale devices [44][45][46][47]. We model the VO 2 film as a 2D square lattice, with each lattice site representing a single homogenous grain (roughly 75 × 75 nm 2 based on atomic force microscopy measurements of the samples, not shown).…”

Section: Resultsmentioning

confidence: 99%

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Magnetic irreversibility in VO₂/Ni bilayers

Lauzier

Sutton²,

Venta³

2018

J. Phys.: Condens. Matter

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We studied the temperature dependence of the magnetic properties of VO/Ni bilayers. The Ni films were deposited on either monoclinic or rutile phase VO. The temperature induced VO transformation from a monoclinic to a rutile structure induces strain in the Ni film. Due to an inverse magnetoelastic effect the coercivity of the Ni films is strongly modified. Both Ni films show strong enhancement of the coercivity near the transition temperature. The coercivity enhancement of Ni is associated with the phase coexistence observed in the VO first order phase transition. Above the transition temperature, Ni deposited on monoclinic VO shows a coercivity enhancement whereas Ni deposited on rutile VO shows suppression of the coercivity. The samples were cycled several times to check if the changes in coercivity were reversible. While samples with Ni deposited on rutile VO show reversibility, samples with Ni deposited on monoclinic VO shown an irreversibility after the first structural phase transition. This irreversibility can be associated with cracking of the VO layer as it relieves stress due to the transition and has implications for the resistance versus temperature behavior of the VO.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Magnetic irreversibility in VO₂/Ni bilayers

Lauzier

Sutton²,

Venta³

2018

J. Phys.: Condens. Matter

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“…Usually, the relative composition of A and B phases (or area fraction in 2D system) is selected as the order parameter to characterize the domain patterns. Although the spontaneous formation of organized structures is a well studied subject, new phenomena are still being uncovered. − …”

Section: Introductionmentioning

confidence: 99%

The Phoenix-like Noble Metal: Cu

Yan

Zhang

Feng

et al. 2018

Crystal Growth & Design

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Copper is one of the least reactive metals under atmospheric conditions. By heating copper in air to hundreds of degrees centigrade, its surface is oxidized to black CuO. Interestingly, the black CuO surface layer peels off automatically when the temperature of the sample is lowered to room temperature. Three-dimensional red self-assembled Cu 2 O nanostructures are observed in the new exposed surface (this phenomenon is compared to a phoenix reborn from the ashes). A simple extension of the spinodal decomposition to single phase system is proposed to account quantitatively for the selfassembled behavior of Cu 2 O nanostructures. The presented analysis is also useful to understand similar behaviors of other single phase systems.

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