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Towards a Metallurgy of Neutron Star Crusts
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
2014 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 112, no 11, 112504- p.Article in journal (Refereed) Published
Abstract [en]

In the standard picture of the crust of a neutron star, matter there is simple: a body- centered-cubic lattice of nuclei immersed in an essentially uniform electron gas. We show that, at densities above that for neutron drip (similar to 4 x 10(11) 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, the 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.
Keyword [en]
Pressure, Equation, Lattice, Matter
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-144537DOI: 10.1103/PhysRevLett.112.112504ISI: 000333163200005ScopusID: 2-s2.0-84897455845OAI: diva2:714439

QC 20140428

Available from: 2014-04-28 Created: 2014-04-24 Last updated: 2014-04-28Bibliographically approved

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Pethick, Christopher J.
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