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Special Issue "Pressure-Induced Phase Transformations"
Deadline for manuscript submissions: 31 October 2019.
The study of phase transitions in solids under high pressure and high temperature is a very active research field. In the last few decades, thanks to the development of experimental techniques and computer simulations, there has been a plethora of important discoveries. Many of the achievements done in recent years affect various research fields going from solid-state physics, chemistry, and materials science to geophysics. They do not only involve the deepening of the knowledge on solid-sold phase transitions but also a better understanding of melting under compression. The impact of pressure on structural, chemical, and physical properties and several modern discoveries are the principal reasons for producing the current Special Issue.
This Special Issue on “Pressure-Induced Phase Transformations” has the aim to give a forum for describing and discussing contemporary achievements. The goal is to give special emphasis to phase transitions and their effects on different physical properties, but other topics, in special melting studies, are not excluded. Authors are invited to contribute to the Special Issue with articles presenting new experimental and theoretical advances. Contributions discussing the relationships of phase transformations in solids under high pressure, the mechanism of these transformations, and their influence in physical and chemical properties are welcome.
Researchers working in a wide range of disciplines are invited to contribute to this Special Issue. The topics summarized under the keywords given below are only broadly examples of the greater number of topics in mind. The volume is especially open not only to original manuscripts but also to feature and short review articles of current hot topics.
Prof. Dr. Daniel Errandonea
Manuscript Submission Information
Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.
Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.
Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.
- High pressure research
- Phase transitions
- Structural properties
- Transition mechanisms
- Equation of state
- Melting curves
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Title: Electrical transport property of [email protected] under high pressure
Authors: Zhongyan Wu, Jaeyong Kim, Alexander Soldatov, Lin Wang
Abstrsct: The goal of this study was to investigate the phase transition of the solvated C60 under high pressure from the view point of electrical transport property. It was found that the resistance of the sample shows a rapid drop as pressure increases but still stay as a semiconductor even up to the highest pressure studied. At around 25GPa the conductivity value reached the minimum and started to rise which corresponding to the pressure-induced collapse of the fullerene cage. The conductivity showed a larger hysteresis during decompression from pressure higher than 25GPa, suggesting the different transport behavior of retained and collapsed fullerenes.
Title: Mechanisms of pressure induced phase transitions by real time Laue diffraction
Authors: D. Popov, N. Velisavljevic
Abstrsct: Synchrotron radiation Laue diffraction is widely implemented to characterize microstructure of materials. Exciting feature of this technique is that comparable number of reflections can be measured multiple orders of magnitude faster than if use monochromatic beam. This makes polychromatic beam diffraction a powerful tool for microstructural studies, critical for understanding of pressure induced phase transitions mechanisms by conducting in-situ and in-operando measurements. Current status of this technique is presented along with some case studies. The major aspects of mechanisms of pressure induced phase transitions, available by real-time Laue diffraction, are discussed, including crystal morphology, orientation relations, twinning, strain. New experimental setup, specifically dedicated to in-situ and in-operando microstructural studies by Laue diffraction under high pressure is presented.
Title: Pressure tuned interactions in Quantum Spin Liquids and Frustrated magnets
Authors: T. Biesner and E. Uykur
Abstrsct: Quantum Spin Liquids are prime examples for strongly entangled phases of matter with unconventional exotic excitations. Here, strong quantum fluctuations prohibit the freezing of the spin system, while its counterpart, the Frustrated magnet still shows a magnetic ground state. Pressure approved to be an effective tuning parameter of structural properties and electronic correlations. Nevertheless, the ability to influence the magnetic phases should not be forgotten. We are going to review experimental progress in the field of pressure tuned magnetic interactions in candidate systems. Elaborating on the possibility of tuned quantum phase transitions, we are further going to show that chemical or external pressure can be a suitable parameter in these exotic states of matter.
Title: New insights into high pressure phase transitions from Landau theory based on symmetry-adapted finite strains
Authors: Andreas Tröster
Abstrsct: Landau theory (LT) coupled to infinitesimal strain is a cornerstone of the theory of structural phase transitions. However, at high pressures this approach breaks down due to the appearance of large strains and the accompanying nonlinear elastic energy contributions. In contrast, in density functional theory (DFT) strain is easy to control, but entropic effects are difficult to incorporate since DFT is a genuine zero temperature method. Recently we have shown how to combine the strengths of these two antipodal approaches by constructing a high pressure extension of conventional LT with the help of DFT. This finite strain Landau theory (FSLT) theory has proved to yield a concise numerical framework for the description of high-pressure phase transition in some prominent perovskites.
In the present paper we show that reformulating FSLT in terms of symmetry-adaped strains does not only help to make its relation to the traditional approach more transparent. It moreover reveals a somewhat surprising but very convenient internal mathematical symmetry that allows to largely eliminate the remaining drawbacks that result from the use of truncated power series in the elastic background strain. The resulting formalism is employed in a discussion of the high-pressure phase transition of KMnF3, for which the available ambient and high pressure experimental data reveal a considerable ambiguity but nevertheless indicate a breakdown of the conventional infinitesimal strain description.
Title: Sesquioxides at high pressure
Authors: F. J. Manjón and J. A. Sans
Abstrsct: In this work, we review the behavior of the different families of sesquioxides under compression. They include those with transition metal atoms, those with group 13 and 15 atoms and those with rare-earth atoms. We have tried to rationalize crystalline structures at room pressure, unit cell volumes, bulk moduli, phase transition pressures, and high-pressure phases on a common basis.