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tahanson43206

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Physics: Phonon vs Photon and related

For SpaceNut ... we had no topics containing the word "phonon"

This topic is offered for those who might care to think about how phonons might transfer energy, or who might find related links, text or images to help NewMars members to understand the concept.

The term ** appears ** to have been invented in 1932 ...

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The concept of phonons was introduced in 1932 by Soviet physicist Igor Tamm. The name phonon comes from the Greek word φωνή (phonē), which translates to sound or voice, because long-wavelength phonons give rise to sound. The name is analogous to the word photon.

Phonon - Wikipediahttps://en.wikipedia.org › wiki › Phonon
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Phonon - Explanation, Types, Properties and In Semiconductorhttps://www.vedantu.com › Physics › Phonon
The concept of phonon was introduced by soviet physicist Igor Tamm in 1932. The word phonon was derived from the Greek word phone, which refers to the ...
What is the definition of Phonon?
What are Phonons and how are they created? How do atoms of Phonon behave?

Phonons - University of Warwickhttps://warwick.ac.uk › current › regs › mpagswarwick
Sep 9, 2010 — A phonon is the elementary excitation in the quantum mechanical treatment of vibrations in a crystal lattice [1] or the quantum unit of a ...

Phonon | physics - Encyclopedia Britannicahttps://www.britannica.com › ... › Matter & Energy
phonon, in condensed-matter physics, a unit of vibrational energy that arises from oscillating atoms within a crystal. Any solid crystal, such as ordinary ...

Phonon | Quantikihttps://www.quantiki.org › wiki › phonon
Oct 26, 2015 — A phonon is a quantized mode of vibration occurring in a rigid crystal lattice, such as the atomic lattice of a solid. The study of phonons ...

Phonon anharmonicity: a pertinent review of recent ... - arXivhttps://arxiv.org › pdf
by B Wei · 2021 · Cited by 10 — such definition is not entirely accurate in vibrational thermodynamics due to the ... concept of phonon “anharmonicity engineering” [35,37] has also been ...

Emergence without limits: The case of phonons - ScienceDirecthttps://www.sciencedirect.com › science › article › pii
by A Franklin · 2018 · Cited by 35 — Leaving aside its traditional philosophical use, the term has been widely ... Section 2 discusses the relevant physics, starting with a simple example of ...

Definition of phonon - PCMaghttps://www.pcmag.com › Encyclopedia › P
A phonon is the sound particle equivalent of a photon, which is a light particle. While photons travel in space, long wave phonons travel within the atomic ...

Phonon Definition & Meaning - YourDictionaryhttps://www.yourdictionary.com › phonon
Phonon definition: The quantum of acoustic or vibrational energy, considered as a quasiparticle and used especially in mathematical models to calculate ...

Electron-Phonon Coupling - cond-mat.dehttps://www.cond-mat.de › manuscripts › heid
by R Heid — The third term describes the lowest-order coupling between electrons and phonons derived from. Eq. (3). Using the relationship Eq. (7) it has the form.
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Rethinking phonons: The issue of disorder - Naturehttps://www.nature.com › ... › articles
by HR Seyf · 2017 · Cited by 85 — Although Allen and Feldman proposed a length scale (l 2 ω) associated with the mode diffusivity (D i (ω)), to our knowledge this definition has ...

Electron-phonon interactions from first principleshttps://ora.ox.ac.uk › objects › files
by F Giustino · 2017 · Cited by 962 — While the electron-phonon interaction has been studied for almost a century, ... phonon term is meaningful only within the harmonic and.

Explained: Phonons | MIT Newshttps://news.mit.edu › explained-phonons-0706
Jul 8, 2010 — Physicists call these basic levels of energy phonons. In a sense, then, “phonon” is just a fancy word for a particle of heat. Phonons are ...

Theory of electron–phonon–dislon interacting system—toward ...https://iopscience.iop.org › article › aaa383
by M Li · 2018 · Cited by 16 — Furthermore, the dislon theory has another advantage over empirical models in ... mk, Momentum-dependent mass term in dislon Hamiltonian.

Non-analytical term correction for phonon dispersion relationshttps://wiki.aalto.fi › display › IMM › Non-analytical+t...
Jul 7, 2020 — This is followed by the dielectric tensor of the material (starts with 5.5455) and the Born effective charges of the irreducible atoms. In Cu2O ...

Phonon Definition & Meaning - Dictionary.comhttps://www.dictionary.com › browse › phonon
It began with the concept that particles, phonons, were a description or consequence of things that you wouldn't think of as particles but as vibrations. The ...

For reference, the article at the link below shows deep mathematics and impressive animations of phonon interactions, in response to a question about electromagnetic packets. 

https://physics.stackexchange.com/quest … etic-field

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tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,440

Re: Physics: Phonon vs Photon and related

I am interested in the concept of "phonons" as energy carriers, for the particular challenge of moving low grade thermal energy from the inner regions of the Earth's mantle to the surface where it may be put to some use.

The "natural" way to move thermal energy from the interior of the Earth to the surface is by moving matter around.

Moving tectonic plates does not seem (to me at least) particularly useful.

Volcanic activity seems (to me at least) to represent a default energy release mechanism when nothing better is available.

Geysers represent a way of moving thermal energy to the surface that is less destructive than volcanoes, but the don't seem particularly useful to me.

Humans have learned to harness thermal energy in liquid form, and there are a number of installations around the world where thermal energy is harnessed in a reasonable manner.

All of the existing systems to harness thermal energy from the Earth (that I know about right now) involve the movement of thermally active baryons from below the surface up to the surface.

From my point of view, it would be preferable to cut out the middle man, and simply move either photons or phonons from beneath the surface to above the surface, where they might be harnessed.

Movement of electrons is a convenient alternative, if it can be done.

Wikipedia offers an article (there may be more than one) that indicates that diamond is a form of matter that conducts phonons particularly well.   If this hint turns out to be correct, then it might be possible to find an arrangement of Carbon (short of diamond) that can transport phonons efficiently.

If Carbon can be enlisted for this activity, then it might turn out to be a good use for Carbon collected from the atmosphere.

I am hoping this new topic may inspire one or more members to imagine energy transport mechanisms using phonons.

Energy transport using photons is already well established as a viable option, when circumstances permit.

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tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,440

Re: Physics: Phonon vs Photon and related

Question asked of Bing: what distance can phonons transport energy

This result set does not appear to address distance. However, I see hints about how to optimize performance of a system using phonons for energy transport.

About 1,360,000 resultsAny time
See all on Wikipedia
Phonon - Wikipedia
https://en.wikipedia.org/wiki/Phonon

Phonons have been shown to exhibit Quantum tunneling behavior (or phonon tunneling) where, across gaps up to a nanometer wide, heat can flow via phonons that "tunnel" between two materials. This type of heat transfer works between distances too large for conduction to occur but too small for … See more
Overview

In physics, a phonon is a collective excitation in a periodic, elastic arrangement of atoms or molecules in condensed matter, specifically in solids and some liquids. A type of quasiparticle, a phonon is an excited state in … See more

Definition

A phonon is the quantum mechanical description of an elementary vibrational motion in which a lattice of atoms or molecules uniformly oscillates at a single frequency. … See more
Crystal momentum

By analogy to photons and matter waves, phonons have been treated with wavevector k as though it has a momentum ħk; however, this is not strictly correct, because ħk is not actually a physical momentum; it is called the crystal momentum or … See more

Operator formalism
The phonon Hamiltonian is given by
In terms of the creation and annihilation operators, these are given by See more
Crystal momentum image
Overview image
Lattice dynamics image

Lattice dynamics
The equations in this section do not use axioms of quantum mechanics but instead use relations for which there exists a direct See more
Acoustic and optical phonons
Solids with more than one atom in the smallest unit cell exhibit two types of phonons: acoustic phonons and optical phonons. See more

Thermodynamics
The thermodynamic properties of a solid are directly related to its phonon structure. The entire set of all possible phonons that are described by the … See more
Wikipedia text under CC-BY-SA license

From Wikipedia

Content
Overview
Definition
Lattice dynamics
Acoustic and optical phonons
Crystal momentum
Thermodynamics
Operator formalism
Explained: Phonons | MIT News - Massachusetts Institute of …
https://news.mit.edu/2010/explained-phonons-0706
Web Jul 8, 2010 · In practice, most materials are filled with a chaotic mix of phonons that have different frequencies and are traveling in different directions, all superimposed on each …

Physics - Phonon Heat Transport Near the Melting Point
https://physics.aps.org/articles/v12/135
WebDec 2, 2019 · APS/ Alan Stonebraker. Figure 1: Lattice vibrations (phonons) play an important role in determining material properties, including …

Author: David Andersson
Estimated Reading Time: 9 mins
Publish Year: 2019
Phonons - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/chemistry/phonons
WebThe main feature of the spectrum for single crystal diamond is a strong peak at ~43.2 THz (1425 cm −1) with two shoulders around 41.5 THz (1384 cm −1) and 45 THz (1501 cm −1 …

Phys. Rev. B 104, 104310 (2021) - Nonequilibrium phonon …
https://link.aps.org/doi/10.1103/PhysRevB.104.104310
WebSep 23, 2021 · The diffusive phonon temperature is merged onto the lattice temperature since they have large scattering rates and can be equilibrated quickly to the lattice …

Author: Jiaxuan Xu, Yue Hu, Xiulin Ruan, Xinyu Wang, Tianli Feng, Hua Bao
Publish Year: 2021
Photon and Phonon Science for Energy Technologies
https://thermalenergy.lbl.gov/photon-an … chnologies
WebPhoton and Phonon Science for Energy Technologies Photons and phonons are two of the fundamental carriers of thermal energy in and between materials. At the quantum scale, …

What is exactly a phonon? - Physics Stack Exchange
https://physics.stackexchange.com/quest … y-a-phonon
WebSep 17, 2016 · The difference with phonons is that there's a maximum frequency at which you can excite the system. This is because there's a minimum wavelength, the distance …

[PDF]Phonon transport across a vacuum gap - Academic Commons
https://academiccommons.columbia.edu/do … X/download
Web that phonons can transport across vacuum gaps up to a few nanometers wide as a result of polar effects. The mechanism describedbyPrunnilaandMeltaus2 andMahan3 …

Phonon - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/ea … ces/phonon
WebThe interactions between phonons, with either the same or different q vectors, can only be correctly described by considering the higher-order derivatives of the energy with respect …

Chiral phonons create spin current without needing magnetic …
https://phys.org/news/2023-02-chiral-ph … rials.html
Web 1 day ago · Chiral phonons are groups of atoms that move in a circular direction when excited by an energy source—in this case, heat. As the phonons move through a material, …

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tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,440

Re: Physics: Phonon vs Photon and related

https://nanoheat.stanford.edu/contact/

I asked Bing to try again to find a web site where phonons might be used for energy transport...

Laboratory
Stanford University
440 Escondido Mall
Building 530 Room 224
Stanford, CA 94305

Phone: 650.725.2086
Fax: 650.723.7657
Email: goodson@stanford.edu

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tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,440

Re: Physics: Phonon vs Photon and related

https://www.ucsusa.org/resources/how-ge … ergy-works

The article at the link above provides a thorough overview of the geothermal energy field.

An MIT study estimated that the United States has the potential to develop 44,000 MWs of geothermal capacity by 2050 by coproducing geothermal electricity at oil and gas fields—primarily in the Southeast and southern Plains states. The study projected that such advanced geothermal systems could supply 10 percent of U.S. baseload electricity by 2050, given R&D and deployment over the next 10 years [17].

The article appears to have been updated as recently as 2013.

This post could go into other topics where geothermal energy is the focus.

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