Towards a metallurgy of neutron star crusts
2014 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 112, no 11, 112504- p.Article in journal (Refereed) Published
In the standard picture of the crust of a neutron star, matter there is simple: a body-centered-cubic (bcc) lattice of nuclei immersed in an essentially uniform electron gas. We show that at densities above that for neutron drip (~4×1011 g cm-3 or roughly one thousandth of nuclear matter density), the interstitial neutrons give rise to an attractive interaction between nuclei that renders the lattice unstable. We argue that the likely equilibrium structure is similar to that in displacive ferroelectric materials such as BaTiO3. As a consequence, properties of matter in the inner crust are expected to be much richer than previously appreciated and we mention possible consequences for observable neutron star properties.
Place, publisher, year, edition, pages
2014. Vol. 112, no 11, 112504- p.
Neutron stars, the inner crust, nuclear astrophysics, crystal structure
Astronomy, Astrophysics and Cosmology Condensed Matter Physics
Research subject Physics
IdentifiersURN: urn:nbn:se:umu:diva-86899DOI: 10.1103/PhysRevLett.112.112504ISI: 000333163200005OAI: oai:DiVA.org:umu-86899DiVA: diva2:704618
ProjectsJC Kempe Scholarship for the project: Theoretical Study of Interior of Neutron Stars II: Plasma Properties of the Inner Crust
Selected as Editor's Suggestion in Phys. Rev. Lett.2014-03-122014-03-122014-07-29Bibliographically approved