Williams RC, Xiao F, Lancaster T, De Renzi R, Allodi G, Bordignon S, Freeman PG, Pratt FL, Giblin SR, Möller JS, Blundell SJ, Boothroyd AT, et al21 October 2015preprint Book Title:arXivNo abstract availableKeywords:51 Physical Sciences , 5104 Condensed Matter Physics DOI10.48550/arxiv.1510.06244