Electronic surface properties of alkali-metal alloys

Bogdanów, H.; Wojciechowski, K.F.

doi:10.1088/0022-3727/29/5/026

Cited by 8 publications

(3 citation statements)

References 22 publications

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“…It seems that because of the scarcity of rel evant data, Fomenko [7] even used the value of the lithium EWF taken from a reference book of a chemist [16]. Regretfully, investigations into the emissivity and EWF of lithium and its alloys have not considerably advanced since then [6,9,11,14,17[. With this in mind, in this article we review the state of the art in experimental research on the lithium EWF, including the works of the authors.…”

Section: State Of the Art In Investigations Of The Lithium Electron Wmentioning

confidence: 99%

Lithium electron work function: State of the art

et al. 2015

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Main findings on the lithium electron work function in ultrahigh vacuum, including the results of the authors, are reviewed. The data were obtained by the Fowler absolute method on polycrystalline lithium samples with various purity grades. It turns out that published data for the emissivity and work function of the lithium electron are scarce. It is shown that when the purity of the initial material (LE 1 lithium) grows by an order of magnitude, the electron work function rises by 7-10% and its temperature coefficient decreases by six times in absolute value.

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Section: State Of the Art In Investigations Of The Lithium Electron Wmentioning

confidence: 99%

Lithium electron work function: State of the art

et al. 2015

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“…40 The reason is the larger atomic-size mismatch in K-Cs compared to Rb-Cs. Moreover, the heats of formation for Rb-Cs are negative suggesting the existence of a mixed alloy instead of phase separation.…”

Section: B Structural Propertiesmentioning

confidence: 99%

“…Theoretical and experimental studies on surface properties of bulk K-Cs and Rb-Cs alloys suggest that while surface segregation is present for K-Cs alloys, it does not occur in Rb-Cs alloys. 40 Moreover, whereas for K-Cs the heats of formation are positive indicating segregation behavior, for Rb-Cs they are negative, suggesting perfect mixing. 41 Considering this, we found it interesting to study if and how the miscibility properties change in these alloy clusters compared to those of bulk alloys.…”

Section: Introductionmentioning

confidence: 99%

Structure and energetics of equiatomic K–Cs and Rb–Cs binary clusters

Hristova

Grigoryan

Springborg

2008

The Journal of Chemical Physics

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The basin-hopping algorithm combined with the Gupta many-body potential is used to study the structural and energetic properties of (KCs)(n) and (RbCs)(n) bimetallic clusters with N=2n up to 50 atoms. Each binary structure is compared to those of the pure clusters of the same size. For the cluster size N=28 and for the size range of N=34-50, the introduction of K and Rb atoms in the Cs alkali metal cluster results in new ground state structures different from those of the pure elements. In the size range N>/=38 the binary and pure clusters show not only structural differences, but they also display different magic numbers. Most of the magic Rb-Cs and K-Cs clusters possess highly symmetric structures. They belong to a family of pIh structures, where a fivefold pancake is a dominant structural motif. Such geometries have not been reported for alkali binary clusters so far, but have been found for series of binary transition metal clusters with large size mismatch. Moreover, tendency to phase separation (shell-like segregation) is predicted for both K-Cs and Rb-Cs clusters with up to 1000 atoms. Our finding of a surface segregation in Rb-Cs clusters is different from that of theoretical and experimental studies on bulk Rb-Cs alloys where phase separation does not occur.

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Effective Work Functions of the Elements

Kawano

2022

Progress in Surface Science

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Electronic surface properties of alkali-metal alloys

Cited by 8 publications

References 22 publications

Lithium electron work function: State of the art

Lithium electron work function: State of the art

Structure and energetics of equiatomic K–Cs and Rb–Cs binary clusters

Effective Work Functions of the Elements

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