Pressure-induced suppression of the Peierls distortion of liquid As and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mtext>Ge</mml:mtext><mml:mi>X</mml:mi></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mi>X</mml:mi><mml:mo>=</mml:mo><mml:mtext>S</mml:mtext><mml:mo>,</mml:mo><mml:mtext>Se</mml:mtext><mml:mo>,</mml:mo><mml:mtext>Te</mml:mtext></mml:mrow><mml:mo>)</m

Chiba, Ayano; Tomomasa, Masatoshi; Hayakawa, Takazumi; Bennington, Stephen M.; Hannon, Alex C.; Tsuji, Kazuhiko

doi:10.1103/physrevb.80.060201

Cited by 18 publications

(16 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our earlier investigation on amorphous As, the As‐As distance was estimated to be 2.56 Å, fairly close to the value predicted in the present work. Additionally this bond length is comparable with the first neighbor distances of 2.52 and 2.54 Å in the rhombohedral A7 crystal and liquid As, respectively . The mean B‐As bond distance is predicted to be 2.06 Å (liquid) and 2.11 Å (amorphous).…”

Section: Resultssupporting

confidence: 62%

See 1 more Smart Citation

Liquid and amorphous states of boron subarsenide

Durandurdu

2019

J Am Ceram Soc

View full text Add to dashboard Cite

Ab initio molecular dynamics simulations are executed to probe the short‐range order and the electrical features of the liquid and amorphous boron subarsenide (B12As2). A drastic volume swelling of ~40% is witnessed for the liquid state, relative to the crystal. The density of the melt is found to be close to that of liquid boron. As the temperature applied is gradually decreased, the volume progressively decreases and a glass‐transition zone at around 1400 K is observed. About 14% volume expansion is perceived for the amorphous phase. Due to the drastic density (volume) difference between the liquid and amorphous forms, their atomic structure is found to be different from each other. In the liquid phase at 2500 K, the mean coordination number (CN) of B and As atoms is 4.4 and 2.5, correspondingly. During the solidification process, both average CNs steadily increase and reach values of 5.5 (B‐atom) and 4.14 (As‐atom) at 300 K. The pentagonal pyramid‐like motifs barely survive at 2500 K but during the quenching process they develop progressively and some of which lead to the formation of B12 clusters. In the amorphous state, the chain‐like and A7‐like As‐As clusters are observed. Nonetheless, the noncrystalline state is proposed to be partially similar to the crystalline structure. The liquid state shows a metallic character while the amorphous form presents a semiconducting nature having an energy band gap much smaller than that of the crystalline phase.

show abstract

Section: Resultssupporting

confidence: 62%

“…Additionally this bond length is comparable with the first neighbor distances of 2.52 and 2.54 Å in the rhombohedral A7 crystal and liquid As, respectively. 19 The mean B-As bond distance is predicted to be 2.06 Å (liquid) and 2.11 Å (amorphous). Again an enlargement is detected in this bond separation by amorphization.…”

Section: Resultsmentioning

confidence: 99%

Liquid and amorphous states of boron subarsenide

Durandurdu

2019

J Am Ceram Soc

View full text Add to dashboard Cite

show abstract

“…(The same results follow as long as the ratio of the acceleration term to friction approaches a constant, as in Ref. [23].) The value of φ * can be estimated using Eq.…”

Section: A Mechanism For Cosmological Coincidencementioning

confidence: 52%

Cosmological coincidence without fine tuning

et al. 2014

View full text Add to dashboard Cite

We present a simple cosmological model in which a single, non-minimally coupled scalar field with a quartic potential is responsible for both inflation at early times and acceleration at late times. Little or no fine tuning is needed to explain why the present density of dark energy is comparable to that of pressureless matter. Dark energy is identified with the potential of the scalar field, which is sourced by the trace of the energy-momentum tensor. This becomes significant when matter has decoupled from radiation and become fully non-relativistic, so that φ ∝ ρ

show abstract

“…There has been great excitement in recent years about the discoveries of liquid-liquid transitions (LLTs) in systems with small molecular or structural units, such as those seen in water [1,2], sodium [3,4], silicon [5], phosphorus [6], arsenic [7], and many others [7][8][9][10]. These transitions (which include continuous transformations) are characterized by changes in static structure.…”

Section: Introductionmentioning

confidence: 99%

“…To investigate changes in static structure, measurements as a function of pressure are preferable because applying pressure can alter interatomic potentials more directly. Such measurements have been proven to be successful in simper systems [2,3,[5][6][7][8][9], and therefore are indispensable for a better understanding of LLTs in polymers.…”

Section: Introductionmentioning

confidence: 99%

Pressure-induced structural change of intermediate-range order in poly(4-methyl-1-pentene) melt

et al. 2012

Self Cite

View full text Add to dashboard Cite

High-pressure in situ x-ray diffraction and specific-volume measurements on isotactic poly(4-methyl-1-pentene) melt have uncovered abrupt changes in the pressure dependence of microscopic structure as well as that of macroscopic density. The first sharp diffraction peak of the polymer melt, which is related to the intermediate-range order and is explained as resulting from the correlations between main chains, is suppressed at pressures less than 1 kbar. These changes in intermediate-range order show similarities to those seen in liquid-liquid or amorphous-amorphous transitions in simpler small molecule based systems, suggesting that this kind of phenomenon may occur in a wide range of materials.

show abstract

Pressure-induced suppression of the Peierls distortion of liquid As andGeX(X=S,Se,Te)

Cited by 18 publications

References 38 publications

Liquid and amorphous states of boron subarsenide

Liquid and amorphous states of boron subarsenide

Cosmological coincidence without fine tuning

Pressure-induced structural change of intermediate-range order in poly(4-methyl-1-pentene) melt

Contact Info

Product

Resources

About