Related by context. Frequent words. (Click for all words.) 65 exciton 65 bosons 64 cuprates 63 phonons 63 excitons 63 electron density 63 solar nebula 63 superfluid 62 silicates 62 excitations 62 interstellar medium 62 fermions 61 quark gluon plasma 61 atoms 61 crystal lattice 61 Bose Einstein condensate 61 oxygen atom 61 alpha particles 60 bilayer 60 adsorbed 60 X ray emission 60 WIMPs 60 hydrogen atom 60 radioactive decay 60 ionised 60 ferromagnetic 60 lithosphere 59 magnetization 59 dimers 59 dynamical 59 dispersive 59 QDs 59 osmium 59 particles 59 anisotropic 59 nuclei 59 atomic nuclei 59 active galactic nuclei 59 Fig. 1A 58 z = 58 shorter wavelengths 58 olivine 58 spacetime 58 radiative 58 nanoscopic 58 quantized 58 dimer 58 nucleation 58 magnetic flux 58 hydrogen ions 58 biomolecule 58 planetary nebulae 58 isotopic composition 58 superfluidity 58 ionize 58 electron 58 Hawking radiation 58 oxygen atoms 58 semiconducting 58 magnetic fields 58 anisotropy 58 organic molecules 58 particle 58 subatomic particle 57 Supplementary Fig 57 biogenic 57 hydroxyl 57 interfacial 57 dopants 57 atomic nucleus 57 ions 57 SiO 2 57 galaxy formation 57 electrons 57 antiprotons 57 aerosol particles 57 magnetic reconnection 57 nanometer sized 57 SWNTs 57 toroidal 57 chirality 57 neutrino 57 hydrogen atoms 57 conductance 56 silicate 56 muon 56 dopant 56 conformations 56 crystalline structure 56 reactants 56 Earth magnetosphere 56 photonic crystal 56 desorption 56 GPa 56 dye molecules 56 hydride 56 microstructures 56 Brownian motion 56 ejecta 56 morphologies 56 superconductivity