Results 291 to 300 of about 2,395,394 (337)

Rotation symmetry breaking in the normal state of a kagome superconductor KV3Sb5

Nature Physics, 2021
Recently discovered superconductors AV3Sb5 (A = K, Rb, Cs)1,2 provide a fresh opportunity to study correlation-driven electronic phenomena on a kagome lattice. The observation of an unusual charge density wave (CDW) in the normal state of all the members
Hong Li, He Zhao, B. Ortiz, Ta-Ryeong Park, Mengxing Ye, L. Balents, Ziqiang Wang, Stephen D. Wilson, I. Zeljkovic   +8 more
semanticscholar   +1 more source

Automatic processing of rotation diffraction data from crystals of initially unknown symmetry and cell constants

, 1993
An algorithm has been developed for the automatic interpretation of a given set of observed reciprocal-lattice points. It extracts a reduced cell and assigns indices to each reflection by a graph-theoretical implementation of the local indexing method ...
W. Kabsch
semanticscholar   +1 more source

Cosmology for Grand Unified Theories with Radiatively Induced Symmetry Breaking

, 1982
The treatment of first-order phase transitions for standard grand unified theories is shown to break down for models with radiatively induced spontaneous symmetry breaking.
A. Albrecht, P. Steinhardt
semanticscholar   +1 more source

Control of spin–orbit torques through crystal symmetry in WTe2/ferromagnet bilayers

Nature Physics, 2016
Recent discoveries regarding current-induced spin–orbit torques produced by heavy-metal/ferromagnet and topological-insulator/ferromagnet bilayers provide the potential for dramatically improved efficiency in the manipulation of magnetic devices. However,
David MacNeill, G. Stiehl, M. Guimarães, R. Buhrman, Jiwoong Park, D. Ralph   +5 more
semanticscholar   +1 more source

Symmetries and symmetry breaking

2017
Abstract The spontaneous breaking of symmetries (SSB) is discussed for global symmetries and Goldstones theorem is derived. The renormalisation of theories with SSB is studied using the effective potential. Then SSB is applied to the Abelian Higgs model, both on the classical and quantum level.
openaire   +1 more source

Symmetry breaking symmetry

2008
Scarcely any term connects art and science more closely than symmetry. This was already a theme in ancient times, as is found in Vitruvius, for example. On the beach of an unknown island, a shipwrecked traveler finds neatly arranged geometric figures. Can he conclude from this that there is an intelligent creator (perhaps even a god)?
Otto E. Rössler, Peter Weibel, Magdolna Hargittai, Szaniszló Bérczi, Francois Molnár, Erwin Chargaff, István Hargittai, Arthur P. Schmidt, Vera Molnár, Michael Stöltzner   +9 more
openaire   +2 more sources

Anti–parity-time symmetry in diffusive systems

Science, 2019
Making heat stand still Dissipative oscillating systems (waves) can be described mathematically in terms of non-Hermitian physics. When parity-time symmetric systems have dissipative components, the interplay between gain and loss can lead to unusual and
Ying Li, Yugui Peng, Lei Han, M. Miri, Wei Li, Meng Xiao, Xue‐Feng Zhu, Jianlin Zhao, A. Alú, S. Fan, C. Qiu   +10 more
semanticscholar   +1 more source

GULP: A computer program for the symmetry-adapted simulation of solids

, 1997
Algorithms for the symmetry-adapted energy minimisation of solids using analytical first and second derivatives have been devised and implemented in a new computer program GULP.
J. Gale
semanticscholar   +1 more source

Observation of PT-symmetry breaking in complex optical potentials.

Physical Review Letters, 2009
In 1998, Bender and Boettcher found that a wide class of Hamiltonians, even though non-Hermitian, can still exhibit entirely real spectra provided that they obey parity-time requirements or PT symmetry.
A. Guo, G. Salamo, D. Duchesne, R. Morandotti, M. Volatier-Ravat, V. Aimez, G. Siviloglou, D. Christodoulides   +7 more
semanticscholar   +1 more source

Symmetry for the sake of symmetry, or symmetry for the sake of behavior?

Behavioral and Brain Sciences, 2002
Wynn suggests that the imposition of symmetry on stone tools is indicative of the evolutionary development of cognitive abilities of the tool makers, particularly that of creating mental images. I suggest that it is more likely indicative of the evolutionary development of the perceptual ability to detect resources for behavior of hand-held objects.
openaire   +2 more sources