Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Phonons in an entropic crystal

Cheng1, Zhu, Russel

  • 1Department of Physics, Princeton University, Princeton, New Jersey 08540, USA.

Physical Review Letters
|September 6, 2000
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

TorchGWAS : GPU-accelerated GWAS for thousands of quantitative phenotypes.

ArXiv·2026
Same author

Less might be more: Enhancing clinical translation of DenseNet for OPC prognosis through selective imaging fusion.

Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology·2025
Same author

Occlusal load modelling significantly impacts the predicted tooth stress response during biting: a simulation study.

Computer methods in biomechanics and biomedical engineering·2020
Same author

The detrimental effects of radiotherapy interruption on local control after concurrent chemoradiotherapy for advanced T-stage nasopharyngeal carcinoma: an observational, prospective analysis.

BMC cancer·2018
Same author

Correlation of endoscopic and histologic findings before and after treatment for nasopharyngeal carcinoma

Head & neck·2001
Same author

Rubisco activation state decreases with increasing nitrogen content in apple leaves

Journal of experimental botany·2000
Same journal

Erratum: Spectroscopy and Ground-State Transfer of Ultracold Bosonic ^{39}K^{133}Cs Molecules [Phys. Rev. Lett. 135, 203401 (2025)].

Physical review letters·2026
Same journal

Erratum: Lifetime of the ^{2}F_{7/2} Level in Yb^{+} for Spontaneous Emission of Electric Octupole Radiation [Phys. Rev. Lett. 127, 213001 (2021)].

Physical review letters·2026
Same journal

Laser-Plasma Based Seeded Free Electron Laser in the High-Gain Regime.

Physical review letters·2026
Same journal

Parent Hamiltonians for Stabilizer Quantum Many-Body Scars.

Physical review letters·2026
Same journal

Properties of Heavy Cosmic Nuclei Phosphorus, Chlorine, Argon, Potassium, and Calcium: Results from the Alpha Magnetic Spectrometer.

Physical review letters·2026
Same journal

Role of Spin-Isospin Symmetries in Nuclear β-Decays.

Physical review letters·2026
See all related articles

Hard spheres crystallize entropically. Novel dynamic light scattering techniques revealed the phonon spectrum of random hexagonal close-packed crystals, showing closer relation to hexagonal close-packed (hcp) than face-centered cubic (fcc) structures.

Area of Science:

  • Condensed Matter Physics
  • Thermodynamics
  • Materials Science

Background:

  • Crystallization in hard sphere systems is driven by entropy, not inter-particle forces.
  • The anharmonic nature of excluded-volume interactions in hard spheres necessitates understanding their phonon spectrum.
  • Phonon dynamics are crucial for characterizing crystal properties and phase transitions.

Purpose of the Study:

  • To measure single-particle motion and the phonon spectrum in entropically crystallized hard spheres.
  • To investigate the phonon dispersion relation in random hexagonal close-packed (hcp) crystals.
  • To compare the phonon spectrum of random hcp with theoretical models for hexagonal close-packed (hcp) and face-centered cubic (fcc) crystals.

Main Methods:

  • Utilized dynamic light scattering (DLS) with advanced techniques.

Related Experiment Videos

  • Employed multispeckle cross-correlation on a charge-coupled device (CCD) chip for enhanced data acquisition.
  • Grew large single crystals of hard spheres using a controlled temperature gradient method.

    • Main Results:

    • Successfully measured the single-particle dynamics and phonon spectrum of hard sphere crystals.
    • Determined that the phonon dispersion relation of the random hexagonal close-packed crystal more closely resembles that of hcp than fcc.
    • Provided experimental evidence for the distinct vibrational properties of entropically formed crystals.

    Conclusions:

    • The phonon spectrum of hard sphere crystals is experimentally accessible using advanced DLS techniques.
    • Entropically driven crystallization leads to a specific phonon behavior that differentiates between hcp and fcc structures.
    • This study offers insights into the fundamental physics of crystallization and the nature of collective excitations in disordered systems.