- #1
Shugart
- 3
- 1
- TL;DR
- non centrosymmetric materials, electron mediated phonon transport, surface phonon polaritons, non-thermal radiation, broken parity (broken inversion symmetry), Van Hove singularity, quantum effects at room temperature, classical physics (approximation) versus quantum physics (reality)
Hello, I am interested in non-centrosymmetric materials, electron-mediated phonon transport, surface phonon polaritons, non-thermal radiation, or broken parity (broken inversion symmetry).
Particularly, I am interested in talking about the effects of removing or reducing Van Hove singularities between 10-20 meV in a conductive material such as copper.
The underlined text in the descriptions highlights (where marked) are the key points of discussion from the paper.
Non-Centrosymmetric Materials / Broken Inversion Symmetry
1. Kilic, B., Alvarruiz, S., Barts, E., van Dijk, B., Barone, P., and Slawinska, J. "Universal symmetry-protected persistent spin textures in noncentrosymmetric crystals." Nature Communications 16, 7999 (2025).
URL: https://www.nature.com/articles/s41467-025-63136-4
Description: This paper proves that breaking inversion symmetry mathematically guarantees exotic quantum spin properties known as persistent spin textures. It demonstrates how quantum mechanics overrides classical spin scattering models, providing the structural framework required to build robust room temperature quantum materials.
2. "Self-Trapped Excitons in 3R ZnIn2S4 with Broken Inversion Symmetry." Advanced Materials 36, 2410417 (2024).
URL: https://pubmed.ncbi.nlm.nih.gov/39506451/
Description: This study reveals how broken inversion symmetry directly forces the creation of localized quantum states called self-trapped excitons. It verifies that structural asymmetry unlocks exotic optoelectronic quantum properties that classical band theory completely fails to predict.
Electron-Mediated Phonon Transport / Electron-Phonon Coupling
3. Bhatt, M., et al. "Discovery of superconductivity and electron-phonon drag in the non-centrosymmetric semimetal LaRhGe3." npj Quantum Materials 9, 107 (2024).
URL: https://www.nature.com/articles/s41535-024-00686-8
Description: By documenting massive quantum phonon drag and magnetoresistance, this research exposes the total breakdown of classical transport models. It shows how structural asymmetry and electron phonon coupling drive macroscale quantum transport anomalies that classical physics cannot explain.
[Note: Classical physics is primarily just a collection of crude approximations that work reasonably well within standard human operating ranges.]
4. Liu, F., Mao, R., Liu, Z., Du, J., and Gao, P. "Probing phonon transport dynamics across an interface by electron microscopy." Nature 642(8069), 941-946 (2025).
URL: https://www.nature.com/articles/s41586-025-09108-6
Description: This work visually proves the failure of classical equilibrium heat models at the nanoscale by directly imaging non equilibrium quantum phonon states. It highlights how quantum interface modes dominate energy transfer, which is a critical advantage for engineering stable room temperature quantum materials.
Surface Phonon Polaritons / Polariton Transport
5. Fuente, J.M., Reiter, R., and Malic, E. "Polariton transport in 2D semiconductors: Phonon-mediated transitions between ballistic, superdiffusive, and exciton-limited regimes." Science Advances (2025).
URL: https://www.science.org/doi/10.1126/sciadv.aea3495
Description: Demonstrating quantum polariton transport at ambient temperatures, this paper proves that quantum scattering creates superdiffusive regimes that bypass classical diffusion limits. It highlights the exact mechanism needed to sustain exotic quantum transport in room temperature devices.
6. Hu, L., et al. "Surface Phonon Polaritons Mediated Energy Transfer between Two Surfaces." Nano Letters 9(8), 2649-2654 (2009).
URL: https://pubs.acs.org/doi/10.1021/nl901208v
Description: This foundational experiment explicitly breaks Planck's classical blackbody radiation law using surface phonon polaritons. It proves that near field quantum coupling enables energy transfer magnitudes that are completely impossible within classical physics approximations.
7. Kim, et al. "Multimode phonon-polaritons in lead-halide perovskites in the nanoslot resonators." Nature Communications 16, 8658 (2025).
URL: https://www.nature.com/articles/s41467-025-63810-7
Description: This study demonstrates superthermal quantum emission driven by polariton and phonon coupling in structured resonators. It highlights how engineered quantum states can bypass classical thermal radiation limits to achieve exotic non thermal energy release.
Non-Thermal Radiation / Kirchhoff Law Violation
8. Hu, R., et al. "Asymmetric thermal conductivity mediated by nonreciprocal polaritons." Physical Review B (2026).
URL: https://link.aps.org/doi/10.1103/pplf-ytqm
Description: The authors prove that topological quantum states explicitly violate Kirchhoff's classical law of thermal radiation. The findings show that broken time reversal symmetry enables directional quantum heat flow that is strictly forbidden in classical thermodynamics.
9. Zhang, Z., Kalantari Dehaghi, A., Ghosh, P., and Zhu, L. "Observation of Strong Nonreciprocal Thermal Emission." Physical Review Letters (2025).
URL: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.135.016901
Description: This landmark study delivers the definitive experimental defeat of Kirchhoff's classical radiation law. It proves that engineered macroscopic quantum states can completely decouple thermal emission from absorption, unlocking a revolutionary technological shift for advanced energy management.
Broken Parity / PT Symmetry
10. Bhardwaj, A. and Islam, S.S. "Tuning of parity-time symmetry effect through exceptional points in non-Hermitian terahertz metasurface." Journal of Applied Physics 137(5), 053105 (2025).
URL: https://pubs.aip.org/aip/jap/article/137/5/053105/3334094/
Description: This paper shows how breaking parity time symmetry forces classical waves into exotic quantum exceptional points. It proves that broken parity enables active, precise control over resonance and absorption well beyond standard classical limits.
Van Hove Singularity
11. McMillan, W.L. and Rowell, J.M. "Tunneling Measurements of Phonon Spectra and Density of States in Superconductors." Physical Review 137, A907 (1965).
URL: https://link.aps.org/doi/10.1103/PhysRev.137.A907
Description: This foundational text proves that Van Hove singularities explicitly dictate quantum electron phonon coupling in metals. By mapping these classical density peaks, it highlights the exact parasitic scattering mechanisms that a new material must eliminate to achieve unbroken quantum transport.
12. Wang, Z., Huang, C.-Y., Hsu, C.-H., Namiki, H., Chang, T.-R., Chuang, F.-C., Lin, H., Sasagawa, T., Madhavan, V., and Okada, Y. "Observation of a van Hove singularity of a surface Fermi arc with prominent coupling to phonons in a Weyl semimetal." Physical Review B 105, 075110 (2022).
URL: https://link.aps.org/doi/10.1103/PhysRevB.105.075110
Description: This research directly links the Van Hove singularity to highly localized anomalous electron phonon scattering. It proves that these singularities act as parasitic classical scattering reservoirs that destroy coherent quantum states near the Fermi energy.
13. Kang, M., et al. "Evidence of strong and mode-selective electron-phonon coupling in a van Hove singularity of kagome metal CsV3Sb5." Nature Communications 15, 6108 (2024).
URL: https://www.nature.com/articles/s41467-024-50590-9
Description: This study proves that the presence of a Van Hove singularity forces advanced materials to default to classical resistive behavior. It highlights how mode selective scattering at the singularity breaks quantum coherence, demonstrating exactly why removing the singularity is essential for maintaining room temperature quantum transport.
14. Hu, J., et al. "Sublinear transport in Kagome metals from the interplay of Dirac cone and Van Hove singularity." Nature Communications 16 (2025).
URL: https://www.nature.com/articles/s41467-025-65685-0
Description: The authors explicitly demonstrate that the Van Hove singularity acts as a momentum relaxing trap that destroys quantum transport and causes violations of classical conductivity models like the Wiedemann Franz law. It proves mathematically that eliminating the singularity from the Fermi level is the necessary technological shift to unlock extreme conductivity and unhindered quantum electron flow.
Particularly, I am interested in talking about the effects of removing or reducing Van Hove singularities between 10-20 meV in a conductive material such as copper.
The underlined text in the descriptions highlights (where marked) are the key points of discussion from the paper.
Non-Centrosymmetric Materials / Broken Inversion Symmetry
1. Kilic, B., Alvarruiz, S., Barts, E., van Dijk, B., Barone, P., and Slawinska, J. "Universal symmetry-protected persistent spin textures in noncentrosymmetric crystals." Nature Communications 16, 7999 (2025).
URL: https://www.nature.com/articles/s41467-025-63136-4
Description: This paper proves that breaking inversion symmetry mathematically guarantees exotic quantum spin properties known as persistent spin textures. It demonstrates how quantum mechanics overrides classical spin scattering models, providing the structural framework required to build robust room temperature quantum materials.
2. "Self-Trapped Excitons in 3R ZnIn2S4 with Broken Inversion Symmetry." Advanced Materials 36, 2410417 (2024).
URL: https://pubmed.ncbi.nlm.nih.gov/39506451/
Description: This study reveals how broken inversion symmetry directly forces the creation of localized quantum states called self-trapped excitons. It verifies that structural asymmetry unlocks exotic optoelectronic quantum properties that classical band theory completely fails to predict.
Electron-Mediated Phonon Transport / Electron-Phonon Coupling
3. Bhatt, M., et al. "Discovery of superconductivity and electron-phonon drag in the non-centrosymmetric semimetal LaRhGe3." npj Quantum Materials 9, 107 (2024).
URL: https://www.nature.com/articles/s41535-024-00686-8
Description: By documenting massive quantum phonon drag and magnetoresistance, this research exposes the total breakdown of classical transport models. It shows how structural asymmetry and electron phonon coupling drive macroscale quantum transport anomalies that classical physics cannot explain.
[Note: Classical physics is primarily just a collection of crude approximations that work reasonably well within standard human operating ranges.]
4. Liu, F., Mao, R., Liu, Z., Du, J., and Gao, P. "Probing phonon transport dynamics across an interface by electron microscopy." Nature 642(8069), 941-946 (2025).
URL: https://www.nature.com/articles/s41586-025-09108-6
Description: This work visually proves the failure of classical equilibrium heat models at the nanoscale by directly imaging non equilibrium quantum phonon states. It highlights how quantum interface modes dominate energy transfer, which is a critical advantage for engineering stable room temperature quantum materials.
Surface Phonon Polaritons / Polariton Transport
5. Fuente, J.M., Reiter, R., and Malic, E. "Polariton transport in 2D semiconductors: Phonon-mediated transitions between ballistic, superdiffusive, and exciton-limited regimes." Science Advances (2025).
URL: https://www.science.org/doi/10.1126/sciadv.aea3495
Description: Demonstrating quantum polariton transport at ambient temperatures, this paper proves that quantum scattering creates superdiffusive regimes that bypass classical diffusion limits. It highlights the exact mechanism needed to sustain exotic quantum transport in room temperature devices.
6. Hu, L., et al. "Surface Phonon Polaritons Mediated Energy Transfer between Two Surfaces." Nano Letters 9(8), 2649-2654 (2009).
URL: https://pubs.acs.org/doi/10.1021/nl901208v
Description: This foundational experiment explicitly breaks Planck's classical blackbody radiation law using surface phonon polaritons. It proves that near field quantum coupling enables energy transfer magnitudes that are completely impossible within classical physics approximations.
7. Kim, et al. "Multimode phonon-polaritons in lead-halide perovskites in the nanoslot resonators." Nature Communications 16, 8658 (2025).
URL: https://www.nature.com/articles/s41467-025-63810-7
Description: This study demonstrates superthermal quantum emission driven by polariton and phonon coupling in structured resonators. It highlights how engineered quantum states can bypass classical thermal radiation limits to achieve exotic non thermal energy release.
Non-Thermal Radiation / Kirchhoff Law Violation
8. Hu, R., et al. "Asymmetric thermal conductivity mediated by nonreciprocal polaritons." Physical Review B (2026).
URL: https://link.aps.org/doi/10.1103/pplf-ytqm
Description: The authors prove that topological quantum states explicitly violate Kirchhoff's classical law of thermal radiation. The findings show that broken time reversal symmetry enables directional quantum heat flow that is strictly forbidden in classical thermodynamics.
9. Zhang, Z., Kalantari Dehaghi, A., Ghosh, P., and Zhu, L. "Observation of Strong Nonreciprocal Thermal Emission." Physical Review Letters (2025).
URL: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.135.016901
Description: This landmark study delivers the definitive experimental defeat of Kirchhoff's classical radiation law. It proves that engineered macroscopic quantum states can completely decouple thermal emission from absorption, unlocking a revolutionary technological shift for advanced energy management.
Broken Parity / PT Symmetry
10. Bhardwaj, A. and Islam, S.S. "Tuning of parity-time symmetry effect through exceptional points in non-Hermitian terahertz metasurface." Journal of Applied Physics 137(5), 053105 (2025).
URL: https://pubs.aip.org/aip/jap/article/137/5/053105/3334094/
Description: This paper shows how breaking parity time symmetry forces classical waves into exotic quantum exceptional points. It proves that broken parity enables active, precise control over resonance and absorption well beyond standard classical limits.
Van Hove Singularity
11. McMillan, W.L. and Rowell, J.M. "Tunneling Measurements of Phonon Spectra and Density of States in Superconductors." Physical Review 137, A907 (1965).
URL: https://link.aps.org/doi/10.1103/PhysRev.137.A907
Description: This foundational text proves that Van Hove singularities explicitly dictate quantum electron phonon coupling in metals. By mapping these classical density peaks, it highlights the exact parasitic scattering mechanisms that a new material must eliminate to achieve unbroken quantum transport.
12. Wang, Z., Huang, C.-Y., Hsu, C.-H., Namiki, H., Chang, T.-R., Chuang, F.-C., Lin, H., Sasagawa, T., Madhavan, V., and Okada, Y. "Observation of a van Hove singularity of a surface Fermi arc with prominent coupling to phonons in a Weyl semimetal." Physical Review B 105, 075110 (2022).
URL: https://link.aps.org/doi/10.1103/PhysRevB.105.075110
Description: This research directly links the Van Hove singularity to highly localized anomalous electron phonon scattering. It proves that these singularities act as parasitic classical scattering reservoirs that destroy coherent quantum states near the Fermi energy.
13. Kang, M., et al. "Evidence of strong and mode-selective electron-phonon coupling in a van Hove singularity of kagome metal CsV3Sb5." Nature Communications 15, 6108 (2024).
URL: https://www.nature.com/articles/s41467-024-50590-9
Description: This study proves that the presence of a Van Hove singularity forces advanced materials to default to classical resistive behavior. It highlights how mode selective scattering at the singularity breaks quantum coherence, demonstrating exactly why removing the singularity is essential for maintaining room temperature quantum transport.
14. Hu, J., et al. "Sublinear transport in Kagome metals from the interplay of Dirac cone and Van Hove singularity." Nature Communications 16 (2025).
URL: https://www.nature.com/articles/s41467-025-65685-0
Description: The authors explicitly demonstrate that the Van Hove singularity acts as a momentum relaxing trap that destroys quantum transport and causes violations of classical conductivity models like the Wiedemann Franz law. It proves mathematically that eliminating the singularity from the Fermi level is the necessary technological shift to unlock extreme conductivity and unhindered quantum electron flow.