Doped kagome system as exotic superconductor

Physical Review B - Condensed Matter and Materials Physics

Volumn 79, Issue 21, 2009, Pages

  Ko, Wing Ho ^a   Lee, Patrick A ^a   Wen, Xiao Gang ^a  

^a MASSACHUSETTS INSTITUTE OF TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 67650079154     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.79.214502     Document Type: Article

References (25)

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11. The stability of the Laughlin ν=1/2 state of boson can be seen by flux attachment argument. Since there are two flux quanta per boson, attaching one flux quanta to each boson maps the Laughlin ν=1/2 state of boson to an integer quantum Hall state of fermion, which is gapped and incompressible. In contrast, a ν=1 quantum Hall state for boson is mapped to a free fermion gas upon attaching one flux quanta to each boson, and hence is unstable.
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17. The gapless mode described here can be considered as the Goldstone mode associated with a spontaneous symmetry broken ground state (cf. Ref.). With this association, the superconductivity can be seen as arising from the usual Anderson-Higgs mechanism in which this Goldstone mode is "eaten up" by the electromagnetic field.
18. The existence of the zero mode (and hence superconductivity) is in fact a rather general consequence of zero total Hall number (i.e., all species ν=0). See Ref..
19. For this intuitive picture to be accurate, the sign of the component must also be taken into account.
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