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Valency

About: Valency is a research topic. Over the lifetime, 1632 publications have been published within this topic receiving 26141 citations.


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Journal ArticleDOI
TL;DR: In this article, electrical conductivity and thermoelectric power of polycrystalline solid solutions of formula Cr1−x, W1+xO4 were measured between room and liquid helium temperature.

3 citations

Journal ArticleDOI
TL;DR: This model simultaneously explains the thermal valence fluctuations, appearance of magnetic Fermi surface, excess entropy at low temperatures, pressure-induced phase transitions, and related features in Raman spectra and their unexpected dependence on temperature and boron isotope.
Abstract: Samarium hexaboride is an anomaly, having many exotic and seemingly mutually incompatible properties. It was proposed to be a mixed-valent semiconductor, and later a topological Kondo insulator, and yet has a Fermi surface despite being an insulator. We propose a new and unified understanding of SmB6 centered on the hitherto unrecognized dynamical bonding effect: the coexistence of two Sm-B bonding modes within SmB6 , corresponding to different oxidation states of the Sm. The mixed valency arises in SmB6 from thermal population of these distinct minima enabled by motion of B. Our model simultaneously explains the thermal valence fluctuations, appearance of magnetic Fermi surface, excess entropy at low temperatures, pressure-induced phase transitions, and related features in Raman spectra and their unexpected dependence on temperature and boron isotope.

3 citations

Journal ArticleDOI
26 Nov 2019
Abstract: Abstract This paper sets out to illustrate differences between learner language and the language of native speakers by a number of tests carried out with students of English at the Friedrich-Alexander-Universität Erlangen-Nürnberg. The first part of the experiment aims at testing knowledge of collocations: In order to compare to what extent combinations of certain words are stored in the constructica of native speakers and advanced learners of English, we used the test battery developed by Dąbrowska (2014): although, as was to be expected, on the whole, native speakers displayed a much greater competence at judging which combinations of words can be regarded as established collocations, interestingly, some learners outperformed some native speakers. The second part of the project was designed to explore the number and types of different valency constructions informants produce on being provided with a verbal stimulus. It is very interesting to see that, given the stimulus word caught, for example, the non-native speakers would predominantly produce sentences with police, thief, murderer, suspect etc. which do not rank amongst the 50 top collexemes of caught in the British National Corpus. We would thus argue that an analysis of the words used in particular slots of argument structure constructions (i.e. the collexemes or itecxes) provides a useful means of characterizing the language of advanced learners and to underscore the importance of collo-phenomena in language teaching.

3 citations

Journal ArticleDOI
TL;DR: This paper gives a characterization of the vertex-stabilizers of (G, s)-transitive graphs of prime valency when Gα is unsolvable.

3 citations

Journal ArticleDOI
TL;DR: In this paper , the classical density functional theory (CDFT) is applied to investigate influences of electrode dielectric constant on specific differential capacitance Cd and specific energy storage E of a cylindrical electrode pore electrical double layer.
Abstract: The classical density functional theory (CDFT) is applied to investigate influences of electrode dielectric constant on specific differential capacitance Cd and specific energy storage E of a cylindrical electrode pore electrical double layer. Throughout all calculations the electrode dielectric constant varies from 5, corresponding to a dielectric electrode, to εwr= 108 corresponding to a metal electrode. Main findings are summarized as below. (i): By using a far smaller value of the solution relative dielectric constant εr=10, which matches with the reality of extremely narrow tube, one discloses that a rather high saturation voltage is needed to attain the saturation energy storage in the ultra-small pore. (ii): Use of a realistic low εr=10 value brings two obvious effects. First, influence of bulk electrolyte concentration on the Cd is rather small except when the electrode potential is around the zero charge potential; influence on the E curve is almost unobservable. Second, there remain the Cd and E enhancing effects caused by counter-ion valency rise, but strength of the effects reduces greatly with dropping of the εr value; in contrast, the Cd and E reducing effects coming from the counter-ion size enhancing remain significant enough for the low εr value. (iii) A large value of electrode relative dielectric constant εrw always reduces both the capacitance and energy storage; moreover, the effect of the εrw value gets eventually unobservable for small enough pore when the εrw value is beyond the scope corresponding to dielectric electrode. It is analyzed that the above effects take their rise in the repulsion and attraction on the counter-ions and co-ions caused by the electrode bound charges and a strengthened inter-counter-ion electrostatic repulsion originated in the low εr value.

3 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202377
2022190
202119
202029
201937
201829