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June 29, 2026Advanced Optical MaterialsOpen Access

When Cubic is Not Isotropic: Phonon–Exciton Decoupling in CuInSnS 4 Single Crystals

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Authors

LLL. LinkeYTY. TommXLXinyun Liu

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Overview

Randomized trial shows phonon-exciton decoupling in CuInSnS4 crystals, suggesting new optical opportunities.

Key Points

  • This research examines how atomic-scale disorder influences the optical properties of cubic single crystals.
  • Combined polarization- and temperature-dependent Raman spectroscopy and infrared near-field microscopy.
  • Conducted steady-state and time-resolved photoluminescence experiments.
  • Performed first-principles calculations to analyze vibrational and excitonic properties.
  • Phonons exhibit symmetry-averaged properties and remain locally homogeneous on the nanoscale.
  • Photoluminescence indicates a lower-energy band-tail emission with strong polarization anisotropy.
  • Identified phonon–exciton decoupling that allows for localized excitons while maintaining vibrational coherence.

Cite This Study

Linke et al. (2026) studied this question.

synapsesocial.com/papers/6a420b2ff91bb43ea91925cehttps://doi.org/10.1002/adom.71392
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