Note to players: Description acceptable. For a system of quantum particles with this property, solutions to Harper’s equation with varying flux ratio produce Hofstadter’s butterfly. Frank (-5[1])Wilczek hypothesized (15[1]-5[1])quasiparticles (-5[1])with (-5[1])fractional spin (-5[1])states called “anyons” (15[2])(“EN-ee-ons”) that (15[1])have only been (15[1])observed in systems (15[1])with (15[1])this property. (15[6])Extreme magnetoresistance (15[1])and a lack of inversion centers allow for spin-valley coupling (-5[2])in a class of materials with this property known as transition-metal di·chalco·genides. An electron gas (-5[1])model (-5[1])of systems with this property exhibits (-5[1])discretized resistance in the (*) quantum Hall effect. (10[1]-5[2])Andre Geim and Konstantin Novoselov (-5[1])used micromechanical (10[1])exfoliation to produce a material (-5[1])with (10[1])this (10[1])topological (10[1]0[1])property (10[3]-5[3])by peeling it (10[1])away (10[1])from a more (10[1])common carbon (10[1])allotrope (10[2])with Scotch tape. (10[1]-5[1])For 10 points, (10[1]-5[1])crystalline (10[2])materials (10[1])like (10[1])graphene have what general property (10[2])of being (10[2])as (10[1])thin (10[2])as possible? (10[3])■END■ (10[12]0[2])