Zobrazeno 1 - 10
of 360
pro vyhledávání: '"Refson K"'
ZrW$_{2}$O$_{8}$ is the prototypical example of a material exhibiting negative thermal expansion (NTE). As well as being among the first NTE materials to be studied in detail, it has served as a test bed for ideas for the physical mechanisms that lea
Externí odkaz:
http://arxiv.org/abs/2408.10797
Autor:
Bowman, D. F., Cemal, E., Lehner, T., Wildes, A. R., Mangin-Thro, L., Nilsen, G. J., Gutmann, M. J., Voneshen, D. J., Prabhakaran, D., Boothroyd, A. T., Porter, D. G., Castelnovo, C., Refson, K., Goff, J. P.
Publikováno v:
Nature Communications 10:637 (2019)
Pyrochlore systems are ideally suited to the exploration of geometrical frustration in three dimensions, and their rich phenomenology encompasses topological order and fractional excitations. Classical spin ices provide the first context in which it
Externí odkaz:
http://arxiv.org/abs/1902.07179
Autor:
Voneshen, D. J., Hatnean, M. Ciomaga, Perring, T. G., Walker, H. C., Refson, K., Balakrishnan, G., Goff, J. P.
From next generation gas turbines to scavenging waste heat from car exhausts, finding new materials with ultra-low thermal conductivity ($\kappa$) has the potential to lead to large gains in device efficiency. Crystal structures with inherently low $
Externí odkaz:
http://arxiv.org/abs/1809.06265
Publikováno v:
Phys. Rev. B 99, 094105 (2019)
We provide a theoretical framework for the prediction and interpretation of momentum dependent phonon spectra due to coherent inelastic scattering of electrons. We complete the approach with first principles lattice dynamics using periodic density fu
Externí odkaz:
http://arxiv.org/abs/1804.10475
We derive and employ a local potential to represent the Fock exchange operator in electronic single-particle equations. This local Fock-exchange (LFX) potential is very similar to the exact exchange (EXX) potential in density functional theory (DFT).
Externí odkaz:
http://arxiv.org/abs/1610.04363
Autor:
Watson, M. D., Feng, Y., Nicholson, C. W., Monney, C., Riley, J. M., Iwasawa, H., Refson, K., Sacksteder, V., Adroja, D. T., Zhao, J., Hoesch, M.
Publikováno v:
Phys. Rev. Lett. 118, 097002 (2017)
We present Angle-Resolved Photoemission Spectroscopy measurements of the quasi-one dimensional superconductor K$_2$Cr$_3$As$_3$. We find that the Fermi surface contains two Fermi surface sheets, with linearly dispersing bands not displaying any signi
Externí odkaz:
http://arxiv.org/abs/1610.04157
Autor:
McClarty, P. A., Krüger, F., Guidi, T., Parker, S. F., Refson, K., Parker, A. W., Prabakharan, D., Coldea, R.
The twin discoveries of the quantum Hall effect, in the 1980's, and of topological band insulators, in the 2000's, were landmarks in physics that enriched our view of the electronic properties of solids. In a nutshell, these discoveries have taught u
Externí odkaz:
http://arxiv.org/abs/1609.01922
Autor:
Porter, D. G., Cemal, E., Voneshen, D. J., Refson, K., Gutmann, M. J., Bombardi, A., Boothroyd, A. T., Krzton-Maziopa, A., Pomjakushina, E., Conder, K., Goff, J. P.
Publikováno v:
Phys. Rev. B 91, 144114 (2015)
Single crystal neutron diffraction is combined with synchrotron x-ray scattering to identify the different superlattice phases present in $Cs_{0.8}Fe_{1.6}Se_2$. A combination of single crystal refinements and first principles modelling are used to p
Externí odkaz:
http://arxiv.org/abs/1505.02527
Publikováno v:
J. Phys.: Condens. Matter 25 (2013) 315402
Single-crystal diffuse scattering data have been collected at room temperature on synthetic titanite using both neutrons and high-energy X-rays. A simple ball-and-springs model reproduces the observed diffuse scattering well, confirming its origin to
Externí odkaz:
http://arxiv.org/abs/1307.3006
The transition metal spinel MgTi$_2$O$_4$ undergoes a metal-insulator transition on cooling below $T_{M-I} = 260$ K. A sharp reduction of the magnetic susceptibility below $T_{M-I}$ suggests the onset of a magnetic singlet state. Using high-resolutio
Externí odkaz:
http://arxiv.org/abs/cond-mat/0308101