Electronically polarized systems are physical systems in which the electronic charge distribution is displaced relative to the nuclei, producing a net electric polarization that can be static, induced, or dynamic. This polarization arises from external electric fields, internal crystal fields, broken inversion symmetry, interfaces, or collective electronic instabilities, and is described microscopically by changes in electronic wavefunctions and macroscopically by a polarization vector field. Such systems include dielectrics, ferroelectrics, polar semiconductors, and heterostructures where bound or itinerant electrons respond anisotropically, strongly influencing dielectric response, excitations, screening, charge transport, and nonlinear optical properties central to condensed-matter and materials physics.
National University of Singapore (NUS) physicists have discovered a novel form of ferroelectricity in a single-element bismuth monolayer that can produce regular and reversible dipole moments for future applications of non-volatile ...
Nanophysics
Apr 6, 2023
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167
Rice University materials scientist Boris Yakobson and collaborators uncovered a property of ferroelectric 2D materials that could be exploited as a feature in future devices.
Nanomaterials
Mar 6, 2023
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270
Professor Juhyuk Lee of the Department of Energy Engineering has developed an elastic triboelectric generator that can be used in the daily lives of frequent movers. The cause of the output reduction of the elastic triboelectric ...
Bio & Medicine
Feb 15, 2023
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144
Antiferroelectric materials have electrical properties that make them advantageous for use in high-density energy storage applications. Researchers have now discovered a size threshold beyond which antiferroelectrics lose ...
Nanomaterials
Feb 9, 2023
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175
A UNSW paper published recently in Nature Reviews Materials presents an exciting overview of the emerging field of 2D ferroelectric materials with layered van der Waals crystal structures, a novel class of low-dimensional ...
Nanomaterials
Oct 27, 2022
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143
A team of researchers led by Rensselaer Polytechnic Institute's Edwin Fohtung, associate professor of materials science and engineering, has combined expertise in mathematics and condensed matter physics with technological ...
Nanophysics
Oct 24, 2022
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156
Discovery of intriguing material behavior at small scales could reduce energy demands for computing.
Nanophysics
Oct 19, 2022
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1597
Piezoelectric materials can convert mechanical energy to electrical energy, and vice versa. In recent years, there has been growing interest in the search for two-dimensional (2D) layered piezoelectrics. Such layered van ...
Nanophysics
Aug 5, 2022
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157
MIT physicists and colleagues have engineered a new property into a well-known family of semiconductors by manipulating ultrathin sheets of the materials only a few atomic layers thick.
Nanophysics
Mar 31, 2022
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251
Intense mid-infrared excitation has been demonstrated as a powerful tool for controlling the magnetic, ferroelectric and superconducting properties of complex materials. Nonlinear phononics is key to this end, as it displaces ...
Nanophysics
Mar 9, 2022
0
104
