Boson-peak-like anomaly caused by transverse phonon softening in strain glass

AbstractStrain glass is a glassy state with frozen ferroelastic/martensitic nanodomains in shape memory alloys, yet its nature remains unclear. Here, we report a glassy feature in strain glass that was thought to be only present in structural glasses. An abnormal hump is observed in strain glass around 10 K upon normalizing the specific heat by cubed temperature, similar to the boson peak in metallic glass. The simulation studies show that this boson-peak-like anomaly is caused by the phonon softening of the non-transforming matrix surrounding martensitic domains, which occurs in a transverse acoustic branch not associated with the martensitic transformation displacements. Therefore, this anomaly neither is a relic of van Hove singularity nor can be explained by other theories relying on structural disorder, while it verifies a recent theoretical model without any assumptions of disorder. This work might provide fresh insights in understanding the nature of glassy states and associated vibrational properties.

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Boson-peak-like anomaly caused by transverse phonon softening in strain glass

10.21203/rs.3.rs-88182/v1 ◽

2020 ◽

Author(s):

Shuai Ren ◽

Hongxiang Zong ◽

Xuefei Tao ◽

Yonghao Sun ◽

Bao An Sun ◽

...

Keyword(s):

Martensitic Transformation ◽

Glassy State ◽

Low Frequency ◽

Boson Peak ◽

Vibrational Properties ◽

Vibrational Modes ◽

Simulation Studies ◽

Dynamic Relaxation ◽

Phonon Softening ◽

Transverse Acoustic

Abstract Strain glass is considered as a new glassy state with frozen ferroelastic/martensitic nanodomains in shape memory alloys, which exhibits many novel functionalities, yet its nature remains unclear. In this study, we reported a new dynamic relaxation behavior in strain glass that was thought to be only present in structural glasses. An abnormal hump was observed in strain glass around 10 K upon normalizing the specific heat (Cp) by cubed temperature, quite similar to the boson peak in metallic glass. The simulation studies showed that this boson-peak-like anomaly in Cp corresponds to excess low-frequency vibrational modes that stem from the transverse acoustic (TA) phonon softening of the non-transforming regions surrounding the nanodomains. The phonon softening takes place in the TA branches not associated with the martensitic transformation displacements. This work may provide a useful perspective for understanding the nature of glassy states and associated vibrational properties.

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Equivalence of the Boson Peak in Glasses to the Transverse Acoustic van Hove Singularity in Crystals

Physical Review Letters ◽

10.1103/physrevlett.106.225501 ◽

2011 ◽

Vol 106 (22) ◽

Cited By ~ 173

Author(s):

A. I. Chumakov ◽

G. Monaco ◽

A. Monaco ◽

W. A. Crichton ◽

A. Bosak ◽

...

Keyword(s):

Boson Peak ◽

Van Hove Singularity ◽

Transverse Acoustic

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Relation between the boson peak in glasses and van Hove singularity in crystals

The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics ◽

10.1080/14786435.2015.1108528 ◽

2015 ◽

Vol 96 (7-9) ◽

pp. 743-753 ◽

Cited By ~ 5

Author(s):

Aleksandr I. Chumakov ◽

Giulio Monaco ◽

Xuemeng Han ◽

Li Xi ◽

Alexey Bosak ◽

...

Keyword(s):

Boson Peak ◽

Van Hove Singularity

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Study of the Boson Peak and Fragility of Bioprotectant Glass-Forming Mixtures by Neutron Scattering

Advances in Materials Science and Engineering ◽

10.1155/2013/128271 ◽

2013 ◽

Vol 2013 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

F. Migliardo ◽

S. Magazù ◽

M. A. Gonzalez ◽

C. Mondelli

Keyword(s):

Data Analysis ◽

Neutron Scattering ◽

Inelastic Neutron Scattering ◽

Inelastic Neutron ◽

Review Article ◽

Boson Peak ◽

Simulation Studies ◽

Glycerol Content ◽

Rutherford Appleton Laboratory ◽

Glass Forming

The biological relevance of trehalose, glycerol, and their mixtures in several anhydrobiotic and cryobiotic organisms has recently promoted both experimental and simulation studies. In addition, these systems are employed in different industrial fields, such as pharmaceutical and cosmetic industries, as additives in mixtures for cryopreservation and in several formulations. This review article shows an overview of Inelastic Neutron Scattering (INS) data, collected at different temperature values by the OSIRIS time-of-flight spectrometer at the ISIS Facility (Rutherford Appleton Laboratory, Oxford, UK) and by the IN4 and IN6 spectrometers at the Institut Laue Langevin (ILL, Grenoble, France), on trehalose/glycerol mixtures as a function of the glycerol content. The data analysis allows determining the Boson peak behavior and discussing the findings in terms of fragility in relation to the bioprotective action of trehalose and glycerol.

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Boson peak as a probe of quantum effects in a glassy state of biomolecules: The case of L-cysteine

Physical Review E ◽

10.1103/physreve.89.022715 ◽

2014 ◽

Vol 89 (2) ◽

Cited By ~ 4

Author(s):

T. A. Lima ◽

M. S. Ishikawa ◽

H. S. Martinho

Keyword(s):

Glassy State ◽

Quantum Effects ◽

Boson Peak

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The Martensitic Transformation and Extra Reflections Appearing Prior to the Transformation in AuCd Alloy

MRS Proceedings ◽

10.1557/proc-459-295 ◽

1996 ◽

Vol 459 ◽

Cited By ~ 3

Author(s):

T. Ohba ◽

K. Otsuka

Keyword(s):

Martensitic Transformation ◽

Synchrotron Radiation ◽

Experimental Error ◽

Parent Phase ◽

Phonon Softening ◽

X Ray ◽

X Ray Scattering ◽

Structure Factors ◽

Small Crystals ◽

Crystal Structural

ABSTRACTAuCd alloy is a typical martensitic alloy. The crystal structural of the ζ2' (trogonal) martensite was recently determined and the analysis indicated the possibility of phonon softening. Despite a large absorption coefficient of Cd phonon softening was actually observed by using an isotope 114Cd. In the present study, precise x-ray scattering studies were performed with a rotating anode x-ray source and synchrotron radiation at Photon Factory in KEK, using small crystals. The structure factors of the parent phase and the diffraction profiles along <110> direction were measured with four circle diffractometers. The structure factors decrease when approaching the transformation temperature. Superstructure reflections were observed prior to the onset of the transformation. They are very weak and rather sharp and appear at q = (1/3,1/3,0) within the experimental error, i. e. at the commensurate position.

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Floppy modes and the Boson peak in crystalline and amorphous silicates: an inelastic neutron scattering study

Mineralogical Magazine ◽

10.1180/002646100549490 ◽

2000 ◽

Vol 64 (3) ◽

pp. 435-440 ◽

Cited By ~ 13

Author(s):

M. J. Harris ◽

M. T. Dove ◽

J. M. Parker

Keyword(s):

Neutron Scattering ◽

Amorphous Materials ◽

Inelastic Neutron Scattering ◽

Inelastic Neutron ◽

Boson Peak ◽

Pure Silica ◽

Transverse Acoustic ◽

Scattering Study ◽

Neutron Scattering Study

AbstractWe present the results of an inelastic neutron scattering study of a crystalline polymorph of SiO2 (α-quartz), and a number of silicate glasses (pure silica, SiO2, and three glasses in the alkali series (K,Li)2Si2O5). We demonstrate the presence of the Boson peak in the inelastic spectra of the crystalline and amorphous materials and argue that it arises simply from the dispersion characteristics of transverse acoustic modes. Furthermore, we investigate the role of the lower-energy floppy modes in the inelastic spectra, and show that they are controlled by chemical effects.

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