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Cui B, Gebbia JF, Tamarit JL, Zaccone A. Disentangling α and β relaxation in orientationally disordered crystals with theory and experiments. Phys Rev E 2018; 97:053001. [PMID: 29906920 DOI: 10.1103/physreve.97.053001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Indexed: 04/26/2023]
Abstract
We use a microscopically motivated generalized Langevin equation (GLE) approach to link the vibrational density of states (VDOS) to the dielectric response of orientational glasses (OGs). The dielectric function calculated based on the GLE is compared with experimental data for the paradigmatic case of two OGs: freon-112 and freon-113, around and just above T_{g}. The memory function is related to the integral of the VDOS times a spectral coupling function γ(ω_{p}), which tells the degree of dynamical coupling between molecular degrees of freedom at different eigenfrequencies. The comparative analysis of the two freons reveals that the appearance of a secondary β relaxation in freon-112 is due to cooperative dynamical coupling in the regime of mesoscopic motions caused by stronger anharmonicity (absent in freon-113) and is associated with the comparatively lower boson peak in the VDOS. The proposed framework brings together all the key aspects of glassy physics (VDOS with the boson peak, dynamical heterogeneity, dissipation, and anharmonicity) into a single model.
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Affiliation(s)
- Bingyu Cui
- Statistical Physics Group, Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, CB3 0AS Cambridge, United Kingdom
| | - Jonathan F Gebbia
- Grup de Caracterizacio de Materials, Departament de Fisica, EEBE, Barcelona Research Center in Multiscale Science and Engineering, Universitat Politecnica de Catalunya, Eduard Maristany, 10-14, 08019 Barcelona, Catalonia
| | - Josep-Lluis Tamarit
- Grup de Caracterizacio de Materials, Departament de Fisica, EEBE, Barcelona Research Center in Multiscale Science and Engineering, Universitat Politecnica de Catalunya, Eduard Maristany, 10-14, 08019 Barcelona, Catalonia
| | - Alessio Zaccone
- Statistical Physics Group, Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, CB3 0AS Cambridge, United Kingdom
- Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, CB3 0HE Cambridge, United Kingdom
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Caballero NB, Zuriaga M, Tamarit JL, Serra P. Dynamic heterogeneity in an orientational glass. J Chem Phys 2017; 147:184501. [DOI: 10.1063/1.5004671] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Nirvana B. Caballero
- CNEA, CONICET, Centro Atomico Bariloche, 8400 San Carlos de Bariloche, Rio Negro, Argentina
| | - Mariano Zuriaga
- Facultad de Matemática, Astronomía, Física y Computación, Universidad Nacional de Córdoba, Córdoba, Argentina and IFEG-CONICET, Ciudad Universitaria, X5016LAE Córdoba, Argentina
| | - Josep Lluís Tamarit
- Grup de Caracterització de Materials, Departament de Física, EEBE and Barcelona Research Center in Multiscale Science and Engineering, Eduard Maristany, 10-14, 08019 Barcelona, Catalonia, Spain
| | - Pablo Serra
- Facultad de Matemática, Astronomía, Física y Computación, Universidad Nacional de Córdoba, Córdoba, Argentina and IFEG-CONICET, Ciudad Universitaria, X5016LAE Córdoba, Argentina
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Golovchak R, Kozdras A, Shpotyuk O, Balitska V. Crossover between cooperative and fractal relaxation in complex glass-formers. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:355101. [PMID: 27365336 DOI: 10.1088/0953-8984/28/35/355101] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Kinetics of physical aging at different temperatures is studied in situ in arsenic selenide glasses using high-precision differential scanning calorimetry technique. A well-expressed step-like behaviour in the enthalpy recovery kinetics is recorded for low aging temperatures. These fine features disappear when the aging temperature (T a) approaches the glass transition temperature (T g). The overall kinetics is described by stretched exponential function with stretching exponent close to 3/5 at T a > ~0.95 T g almost independent on glass composition, and 3/7 when the aging temperature drops to ~0.9 T g. These values are consistent with the prediction of Phillips' diffusion-to-traps model. Further decrease in aging temperature to ~0.85 T g leads to the appearance of step-like behaviour and stretching exponent of 1/3 for the overall kinetics, which is the limiting value predicted by random walk on the fractal model. Such behavior is explained as crossover from homogeneous cooperative relaxation of non-percolating structural units to high-dimensional fractal relaxation within hierarchically-arranged two-stage physical aging model.
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Affiliation(s)
- R Golovchak
- Department of Physics and Astronomy, Austin Peay State University, Clarksville, TN 37044, USA
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Caballero NB, Zuriaga M, Carignano M, Serra P. Dynamic Heterogeneity in the Monoclinic Phase of CCl4. J Phys Chem B 2016; 120:860-5. [PMID: 26756802 DOI: 10.1021/acs.jpcb.5b11658] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Carbon tetrachloride (CCl4) is one of the simplest compounds having a translationally stable monoclinic phase while exhibiting a rich rotational dynamics below 226 K. Recent nuclear quadrupolar resonance experiments revealed that the dynamics of CCl4 is similar to that of the other members of the isostructural series CBrnCl4-n, suggesting that the universal relaxation features of canonical glasses such as α and β relaxation are also present in nonglass formers. Using molecular dynamics simulations we studied the rotational dynamics in the monoclinic phase of CCl4. The molecules undergo C3-type jump-like rotations around each one of the four C-Cl bonds. The rotational dynamics is very well described with a master equation using as the only input the rotational rates measured from the simulated trajectories. It is found that the heterogeneous dynamics emerges from faster and slower modes associated with different rotational axes, which have fixed orientations relative to the crystal and are distributed among the four nonequivalent molecules of the unit cell.
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Affiliation(s)
- Nirvana B Caballero
- Facultad de Matemática, Astronomía y Física, Universidad Nacional de Córdoba , X5016LAE Córdoba, Argentina.,IFEG-CONICET, Ciudad Universitaria , X5016LAE Córdoba, Argentina
| | - Mariano Zuriaga
- Facultad de Matemática, Astronomía y Física, Universidad Nacional de Córdoba , X5016LAE Córdoba, Argentina.,IFEG-CONICET, Ciudad Universitaria , X5016LAE Córdoba, Argentina
| | - Marcelo Carignano
- Qatar Environment and Energy Research Institute, Hamad Bin Khalifa University , P.O. Box 5825, Doha, Qatar
| | - Pablo Serra
- Facultad de Matemática, Astronomía y Física, Universidad Nacional de Córdoba , X5016LAE Córdoba, Argentina.,IFEG-CONICET, Ciudad Universitaria , X5016LAE Córdoba, Argentina
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Pérez SC, Zuriaga M, Serra P, Wolfenson A, Negrier P, Tamarit JL. Dynamic characterization of crystalline and glass phases of deuterated 1,1,2,2 tetrachloroethane. J Chem Phys 2015; 143:134502. [DOI: 10.1063/1.4931824] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Silvina C. Pérez
- Facultad de Matemática, Astronomía y Física, Universidad Nacional de Córdoba and IFEG-CONICET, Ciudad Universitaria, X5016LAE Córdoba, Argentina
| | - Mariano Zuriaga
- Facultad de Matemática, Astronomía y Física, Universidad Nacional de Córdoba and IFEG-CONICET, Ciudad Universitaria, X5016LAE Córdoba, Argentina
| | - Pablo Serra
- Facultad de Matemática, Astronomía y Física, Universidad Nacional de Córdoba and IFEG-CONICET, Ciudad Universitaria, X5016LAE Córdoba, Argentina
| | - Alberto Wolfenson
- Facultad de Matemática, Astronomía y Física, Universidad Nacional de Córdoba and IFEG-CONICET, Ciudad Universitaria, X5016LAE Córdoba, Argentina
| | - Philippe Negrier
- Université Bordeaux, LOMA, UMR 5798, F-33400 Talence, France and LOMA, UMR 5798, F-33400 Talence, France
| | - Josep Lluis Tamarit
- Grup de Caracterització de Materials, Departament de Física i Enginyeria Nuclear, ETSEIB, Diagonal 647, Universitat Politècnica de Catalunya, 08028 Barcelona, Catalonia, Spain
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Zuriaga MJ, Perez SC, Pardo LC, Tamarit JL. Dynamic heterogeneity in the glass-like monoclinic phases of CBrnCl4−n, n = 0,1,2. J Chem Phys 2012; 137:054506. [DOI: 10.1063/1.4739531] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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Zuriaga M, Carignano M, Serra P. Rotational relaxation characteristics of the monoclinic phase of CCl4. J Chem Phys 2011; 135:044504. [DOI: 10.1063/1.3614417] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Affouard F, Correia NT. Debye Process in Ibuprofen Glass-Forming Liquid: Insights from Molecular Dynamics Simulation. J Phys Chem B 2010; 114:11397-402. [DOI: 10.1021/jp1046358] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- F. Affouard
- Unité Matériaux et Transformation (UMET), UMR CNRS 8207, UFR de Physique, BAT P5, Université Lille 1, 59655 Villeneuve d’Ascq, France
| | - Natália T. Correia
- REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
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Zuriaga M, Pardo LC, Lunkenheimer P, Tamarit JL, Veglio N, Barrio M, Bermejo FJ, Loidl A. New microscopic mechanism for secondary relaxation in glasses. PHYSICAL REVIEW LETTERS 2009; 103:075701. [PMID: 19792661 DOI: 10.1103/physrevlett.103.075701] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2008] [Revised: 05/12/2009] [Indexed: 05/28/2023]
Abstract
The dynamics of simple molecular systems showing glassy properties has been explored by dielectric spectroscopy and nuclear quadrupole resonance (NQR) on the halogenomethanes CBr2Cl2 and CBrCl3 in their low-temperature monoclinic phases. The dielectric spectra display features which correspond to alpha- and beta-relaxation processes, commonly observed in canonical glass formers. NQR experiments, also performed in the ergodic monoclinic phase of CCl4, enable the determination of the microscopic mechanism underlying the beta dynamics in these simple model glasses: Molecules that are nonequivalent with respect to their molecular environment perform reorientational jumps at different time scales. Thus our findings reveal another mechanism that can give rise to typical beta-relaxation behavior, raising some doubt about the existence of a universal explanation of this phenomenon.
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Affiliation(s)
- M Zuriaga
- IFFAMAF, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba 5000, Argentina
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Ngai KL, Capaccioli S, Shinyashiki N. The Protein “Glass” Transition and the Role of the Solvent. J Phys Chem B 2008; 112:3826-32. [DOI: 10.1021/jp710462e] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K. L. Ngai
- Naval Research Laboratory, Washington, DC, 20375-5320, Dipartimento di Fisica, Università di Pisa, Largo B. Pontecorvo 3, I-56127, Pisa, Italy, and polyLab, CNR-INFM, Largo B. Pontecorvo 3, I-56127, Pisa, Italy, and Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - S. Capaccioli
- Naval Research Laboratory, Washington, DC, 20375-5320, Dipartimento di Fisica, Università di Pisa, Largo B. Pontecorvo 3, I-56127, Pisa, Italy, and polyLab, CNR-INFM, Largo B. Pontecorvo 3, I-56127, Pisa, Italy, and Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - N. Shinyashiki
- Naval Research Laboratory, Washington, DC, 20375-5320, Dipartimento di Fisica, Università di Pisa, Largo B. Pontecorvo 3, I-56127, Pisa, Italy, and polyLab, CNR-INFM, Largo B. Pontecorvo 3, I-56127, Pisa, Italy, and Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
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