Jahn-Teller and geometric frustration effects on the structural and magnetic ground states of substituted spinels (Ni,A)Cr2O4 (A = Mn/Cu)
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Alloys and Compounds"
DOI: 10.1016/j.jallcom.2020.154139
Abstract: Abstract Comparative study of the effects of substitution (25%) of Jahn-Teller (JT) active Cu2+ and non JT active Mn2+ cations, at the Ni2+ site, on the geometric frustration (GF) and cooperative JT distortion (CJTD) in… read more here.
Keywords: teller geometric; geometric frustration; jahn teller; frustration ... See more keywords
Adaptive Self-Assembly in 2D Nanoconfined Spaces: Dealing with Geometric Frustration
Sign Up to like & getrecommendations! Published in 2019 at "Chemistry of Materials"
DOI: 10.1021/acs.chemmater.9b01251
Abstract: The impact of lateral confinement on the 2D self-assembly of a normal alkane is investigated via scanning tunneling microscopy-based nanoshaving on covalently modified graphite surfaces. Physical constraints placed on the confined assemblies lead to geometric… read more here.
Keywords: geometric frustration; self assembly; adaptive self; assembly nanoconfined ... See more keywords
Is Geometric Frustration-Induced Disorder a Recipe for High Ionic Conductivity?
Sign Up to like & getrecommendations! Published in 2017 at "Journal of the American Chemical Society"
DOI: 10.1021/jacs.7b00502
Abstract: Ionic conductivity is ubiquitous to many industrially important applications such as fuel cells, batteries, sensors, and catalysis. Tunable conductivity in these systems is therefore key to their commercial viability. Here, we show that geometric frustration… read more here.
Keywords: ionic conductivity; frustration induced; disorder; geometric frustration ... See more keywords
Universal geometric frustration in pyrochlores
Sign Up to like & getrecommendations! Published in 2018 at "Nature Communications"
DOI: 10.1038/s41467-018-05033-7
Abstract: Materials with the pyrochlore/fluorite structure have diverse technological applications, from magnetism to nuclear waste disposal. Here we report the observation of structural instability present in the pyrochlores A2Zr2O6Oʹ (A = Pr, La) and Yb2Ti2O6Oʹ, that exists despite… read more here.
Keywords: universal geometric; order; geometric frustration; structure ... See more keywords
Switchable geometric frustration in an artificial-spin-ice–superconductor heterosystem
Sign Up to like & getrecommendations! Published in 2018 at "Nature Nanotechnology"
DOI: 10.1038/s41565-018-0162-7
Abstract: Geometric frustration emerges when local interaction energies in an ordered lattice structure cannot be simultaneously minimized, resulting in a large number of degenerate states. The numerous degenerate configurations may lead to practical applications in microelectronics1,… read more here.
Keywords: spin ice; artificial spin; geometric frustration;
Geometric frustration in ordered lattices of plasmonic nanoelements
Sign Up to like & getrecommendations! Published in 2019 at "Scientific Reports"
DOI: 10.1038/s41598-019-40117-4
Abstract: Inspired by geometrically frustrated magnetic systems, we present the optical response of three cases of hexagonal lattices of plasmonic nanoelements. All of them were designed using a metal-insulator-metal configuration to enhance absorption of light, with… read more here.
Keywords: frustration ordered; geometric frustration; ordered lattices; lattices plasmonic ... See more keywords
Explicit demonstration of geometric frustration in chiral liquid crystals.
Sign Up to like & getrecommendations! Published in 2022 at "Soft matter"
DOI: 10.1039/d2sm01420c
Abstract: Many solid materials and liquid crystals exhibit geometric frustration, meaning that they have an ideal local structure that cannot fill up space. For that reason, the global phase must be a compromise between the ideal… read more here.
Keywords: twist; geometric frustration; structure; liquid crystals ... See more keywords
Relieving nematic geometric frustration in the plane
Sign Up to like & getrecommendations! Published in 2023 at "Journal of Physics A: Mathematical and Theoretical"
DOI: 10.1088/1751-8121/acd890
Abstract: Frustration in nematic-ordered media (endowed with a director field) is treated in a purely geometric fashion in a flat, two-dimensional space. We recall the definition of quasi-uniform distortions and envision these as viable ways to… read more here.
Keywords: frustration; relieving nematic; nematic geometric; plane ... See more keywords
Cumulative geometric frustration and superextensive energy scaling in a nonlinear classical XY-spin model.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.105.024703
Abstract: Geometric frustration results from a discrepancy between the locally favored arrangement of the constituents of a system and the geometry of the embedding space. Geometric frustration can be either noncumulative, which implies an extensive energy… read more here.
Keywords: superextensive energy; frustration; model; cumulative geometric ... See more keywords
Emergent Geometric Frustration and Flat Band in Moiré Bilayer Graphene.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.123.186402
Abstract: So far the physics of moiré graphene bilayers at large, incommensurate rotation angles has been considered uninteresting. It has been held that the interlayer coupling in such structures is weak and the system can be… read more here.
Keywords: frustration flat; physics; emergent geometric; flat band ... See more keywords