of or concerned with an oscillation whose frequency is not an integral factor or multiple of the base frequency
anharmonic in American English
(ˌænhɑːrˈmɑnɪk)
adjective
Physics
of or pertaining to an oscillating system that is not undergoing simple harmonic motion
Word origin
[an-1 + harmonic; modeled on F anharmonique]an- is a prefix occurring before stems beginning with a vowel or h in loanwords from Greek, where it means “not,” “without,” “lacking” (anarchy; anecdote); used in the formation of compound words. Other words that use the affix an- include: anapsid, anelasticity, anodyne, anopheles, anoxia
Examples of 'anharmonic' in a sentence
anharmonic
Anharmonic ultrafast structural dynamics are expected in lead halide perovskites due to their soft nature.
Jasmine P. H. Rivett, Liang Z. Tan, Michael B. Price, Sean A. Bourelle, NathanielJ. L. K. Davis, James Xiao, Yatao Zou, Rox Middleton, Baoquan Sun, Andrew M. Rappe,Dan Credgington, Felix Deschler 2018, 'Long-lived polarization memory in the electronic states of lead-halide perovskitesfrom local structural dynamics', Nature Communicationshttp://link.springer.com/article/10.1038/s41467-018-06009-3. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Additional features are identified that are caused by the anharmonic potential.
Martin Dressel, Michael Dumm, Tobias Knoblauch, Matteo Masino 2012, 'Comprehensive Optical Investigations of Charge Order in Organic Chain Compounds (TMTTF)2X',Crystalshttp://www.mdpi.com/2073-4352/2/2/528. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
To achieve this aim, the anharmonic phonon-phonon interaction and the spin-phonon interaction were used.
Cao Xian-Sheng 2018, 'Anharmonic phonon properties in Eu0.5Ba0.5TiO3', Materials Science-Polandhttp://www.degruyter.com/view/j/msp.2018.36.issue-1/msp-2018-0003/msp-2018-0003.xml?format=INT. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
We consider two interacting atoms subject to a one-dimensional anharmonic trap and magnetic field gradient.
Ishmukhamedov Ilyas, Ishmukhamedov Altay 2018, 'Tunneling of Two Interacting Fermions', EPJ Web of Conferenceshttps://doi.org/10.1051/epjconf/201817709006. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Some remarkable arithmetic properties of the anharmonic oscillator are considered.
I.Ya. Aref'eva, B.G. Dragović, I.V. Volovich 1988, 'On the p-adic summability of the anharmonic oscillator', Physics Letters Bhttp://www.sciencedirect.com/science/article/pii/037026938890161X. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
In this work we consider anharmonic corrections to the mass term coming from a repulsive quartic self-interaction.
J. A. R. Cembranos, A. L. Maroto, S. J. Núñez Jareño, H. Villarrubia-Rojo 2018, 'Constraints on anharmonic corrections of fuzzy dark matter', Journal of High Energy Physicshttp://link.springer.com/article/10.1007/JHEP08(2018)073. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The introduction of anharmonic terms decreases the harmonic wavenumbers, giving a significantly better agreement with the experimental data.
Andrea Alparone 2013, 'Infrared and Raman Spectra of and Isotopomers: A DFT-PT2 Anharmonic Study', Journal of Chemistryhttp://dx.doi.org/10.1155/2013/741472. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Advances in anharmonic theories in hyphenation with ever-growing computer technology have enabled feasible theoretical near-infrared spectroscopy in recent times.
Krzysztof B. Beć, Christian W. Huck 2019, 'Breakthrough Potential in Near-Infrared Spectroscopy: Spectra Simulation. A Reviewof Recent Developments', Frontiers in Chemistryhttps://www.frontiersin.org/article/10.3389/fchem.2019.00048/full. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
They are very similar to intrinsic localized modes predicted to appear in lattice excitations of anharmonic condensed matter systems.
G. Dugan 1999, 'Localized multibunch modes in accelerators', Physical Review Special Topics. Accelerators and Beamshttp://doi.org/10.1103/PhysRevSTAB.2.094401. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
In the line-width variation analysis, the cubic anharmonic term was found to dominate the quartic term.
Sugandha Dogra Pandey, Jasveer Singh, K. Samanta, Nita Dilawar Sharma, A. K. Bandyopadhyay 2015, 'Temperature Dependent Variations of Phonon Interactions in Nanocrystalline CeriumOxide', Journal of Nanomaterialshttp://dx.doi.org/10.1155/2015/492967. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)