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pdf, 9 MiB - Infoscience - EPFL

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108 CHAPTER 4. HONEYCOMB LATTICE<br />

Order parameter (arb.units)<br />

1<br />

0.5<br />

AF<br />

F<br />

1/8<br />

SC SDW<br />

0 0.1 0.2 0.3 0.4 0.5<br />

Hole doping<br />

0.6<br />

Figure 4.15: Cartoon picture of the phase diagram: the superconducting phase<br />

(SC), the Néel phase (AF), the spin density wave phase with pitch vector Q N =<br />

(π, −π/ √ 3) (SDW), and the partially polarized ferromagnetic phase (F).

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