Aspect of Spin-Charge Separation due to Antiferromagentic Spin Fluctuations in Technically Nested 2D Metals

Details Aspect of Spin-Charge Separation due to Antiferromagentic Spin Fluctuations in Technically Nested 2D Metals Aspect of Spin-Charge Separation due to Antiferromagentic Spin Fluctuations in Technically Nested 2D Metals

1994-03-15

arxiv.org/abs/cond-mat/9403054v1

Physics

Condensed Matter

10 pages, revtex ver.3.0, hard copies of 4 figures which will be sent on request

Scientific paper

It is shown that the charge susceptibility in nearly half-filled two-dimensional (2D) metals, with technically nested Fermi surface, shows anomaly at the wavevector different from that for the spin susceptibility at low temperatures. Namely charge degrees of freedom behave there as if their ``Fermi surface" corresponded to that of ``holes" created in the Mott insulator. Such anomaly is caused by the Aslamazov-Larkin type contribution of 2D antiferromagnetic spin fluctuations. This phenomenon gives a possible clue to resolve the paradox of normal state properties of high-$T_{\rm c}$ cuprates {\it starting}\/ from the Fermi-liquid fixed point.

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