Photoemission from liquid and solid mercury

Cotti, P.; Güntherodt, H.-J.; Münz, Peter; Oelhafen, P.; Wullschleger, Jürg

doi:10.1016/0038-1098(73)90302-5

Cited by 30 publications

(7 citation statements)

References 14 publications

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“…To study the electronic properties, Jank and Hafner [4] have used the linear-muffintin orbital with atomic sphere approximation (LMTO-ASA), while Bose [5] has reported a scalar-relativistic tight binding LMTO calculation. On the experimental side, Cotti et al [6] have reported measurements of the 0932-0784 / 04 / 0900-0543 $ 06.00 c 2004 Verlag der Zeitschrift für Naturforschung, Tübingen · http://znaturforsch.com photoemission spectrum of liquid mercury. On the basis of photoemission work, Oellhafen et al [7] have also pointed to the existence of a minimum in the DOS at the Fermi level in liquid mercury.…”

Section: Introductionmentioning

confidence: 99%

Electronic Structure of Liquid Mercury Using Compton Scattering Technique

Ahuja

Sharma

Mathur

2004

Zeitschrift Für Naturforschung A

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The isotropic Compton profile of mercury has been measured, using 661.65 keV gamma-rays from a 20 Ci 137 Cs source. To extract the true experimental Compton line shape, besides the usual systematic corrections we have incorporated for the first time the background correction due to bremsstrahlung radiation generated by photo and Compton electrons. Theoretical computations have been carried out, using the renormalised-free-atom (RFA) for the electron configuration 4f 14 5d 10 6s 2 and free electron models. It is found that the present experimental data with bremsstrahlung background correction are in better agreement with the RFA calculations. This work suggests the incorporation of the bremsstrahlung background correction in Compton scattering experiments of heavy materials using high-energy gamma-ray sources.

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Section: Introductionmentioning

confidence: 99%

Electronic Structure of Liquid Mercury Using Compton Scattering Technique

Ahuja

Sharma

Mathur

2004

Zeitschrift Für Naturforschung A

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“…Weakly, but distinctly, we observe in figures 2 (a),(b) the energy positions which reflect the Fermi edge of condensed mercury which lies below the vacuum level by the amount of the work function (I) = 4"49 eV [8]. Within our experimental accuracy the two positions marked E~ are separated by the difference between the energy of the photons (hv = 21"211eV) and the excitation energy of the metastables (E[He(2 3S)] = 19"819 eV).…”

Section: Resultsmentioning

confidence: 97%

“…To our knowledge, this is the first time that a liquid metal is probed with this experimental technique. However, liquid mercury has been studied before by several methods, like photoelectron spectroscopy [8,9], secondary electron spectroscopy and electron energy loss spectroscopy under electron impact [10]. Another study dealt with the surface plasmons of liquid mercury [11], and the liquid-vapour interface was investigated by computer simulation [12].…”

Section: Introductionmentioning

confidence: 99%

Electron spectroscopy of liquid mercury under impact of metastable He(2³S) atoms

1986

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We have performed electron spectroscopy of a liquid mercury surface under impact of HeI photons and of metastable He(238) atoms. The latter data are interpreted in terms of Auger neutralization. This process involves two electrons from the metal surface and thereby yields information about the mutual interaction between two metal electrons. Evaluation of our data shows that the interaction is specific to the band from which the electrons come and whether they originate from the same or from different bands. Further, we find no support for the suggestion that a few per cent of the surface sites of liquid surface are occupied by nonmetallic mercury atoms.

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“…(a) Photoen~ission from Liquid Hg-Because of a possible pseudogap referred to previously, Hg has attracted considerable attention and Cotti et al (23) have reported measurements of the energy distribution of photoemitted electrons from both the liquid and solid.…”

Section: Soft X-raj' and Plzotoen~ission Experirnetzts Onmentioning

confidence: 99%

Electron states in liquid metals: especially optical and magnetic properties

March¹

1977

Can. J. Chem.

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The theory of optical absorption of the simple liquid metals (e.g. the alkalis) is outlined. At not too large frequencies, the Drude theory is regained. The relaxation time is that given by the weak scattering (Ziman) theory of electrical resistivity. For high frequencies, the relaxation time, however, becomes frequency dependent. Appreciable structure enters the theory, arising from collective excitations. The relation to recent ellipsometric measurements on liquid Na is briefly discussed. The optical conductivity and density of states in the divalent metals Hg and Be is then discussed, followed by the relation between photoemission and soft X-ray experiments and current electron theory. Specific attention is given to the evidence for a pseudo-gap in the divalent metals and to changes in the electron states which occur on melting the noble metals.The second major area treated is concerned with the magnetic properties of liquid metals. The theory of orbital and spin magnetism in simple liquid metals is reviewed and confronted with experiment. It is clear that the electron-electron enhancement effects have a dominant influence on the trend of the spin susceptibility of simple liquid metals as a function of density. However, electron-ion interactions must be introduced as corrections to the interacting electron gas values and in a metal like Li the nearly free electron theory fails to do this adequately. Knight shift results are summarized, and some attention is given to a recent experiment on the Knight shift of expanded fluid Hg. Difficulties for the theory in relation to transport and the pseudo-gap are pointed out. Finally, new theoretical calculations are reported on the relation between the magnetic properties of the liquid rare earth metals and their electrical conductivity. On dicrit la theorie de l'absorption optique des metaux liquides simples (par exemple les alcalis). A des frequences qui ne sont pas trop grandes, on retrouve la theorie de Drude. Le temps de relaxation est celui prCvu par la theorie (Ziman) de dispersion faible de la resistiviti Clectrique. Pour des frequences Clevees, il existe toutefois une relation entre le temps de relaxation et la frequence. Un degre appreciable de structure, provenant d'excitations collectives, entre dans la thCorie. On discute de la relation qui existe avec les mesures ellipsomCtriques effectuees rkcemment sur du sodium liquide. On discute alors de la conductivite optique et de la densite d'etats dans les metaux divalents Hg et Be; le tout est suivi par la relation qui existe entre les experiences de photoemission et de rayons-X doux et la theorie tlectronique prkvaut actuellement. On porte une attention spiciale aux preuves concernant un pseudo-gap dans les mCtaux divalents et a un changen~ent dam les etats electroniques qui se produisent lorsque l'on fait fondre des metaux nobles.La deuxieme section importante qui sera traitee concerne les proprietes nlagnetiques des metaux iiquides. On passe en revue la theorie des magnetisnies orbital et de spin dans des mtt...

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Photoemission from liquid and solid mercury

Cited by 30 publications

References 14 publications

Electronic Structure of Liquid Mercury Using Compton Scattering Technique

Electronic Structure of Liquid Mercury Using Compton Scattering Technique

Electron spectroscopy of liquid mercury under impact of metastable He(2³S) atoms

Electron states in liquid metals: especially optical and magnetic properties

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Photoemission from liquid and solid mercury

Cited by 30 publications

References 14 publications

Electronic Structure of Liquid Mercury Using Compton Scattering Technique

Electronic Structure of Liquid Mercury Using Compton Scattering Technique

Electron spectroscopy of liquid mercury under impact of metastable He(23S) atoms

Electron states in liquid metals: especially optical and magnetic properties

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Electron spectroscopy of liquid mercury under impact of metastable He(2³S) atoms