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Spin-charge gauge approach to metal-insulator crossover and transport properties in High-T$_c$ cuprates

P. A. Marchetti·Z. B. Su·L. Yu
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Abstract

The spin-charge gauge approach to consider the metal-insulator crossover (MIC) and other anomalous transport properties in High-T$_c$ cuprates is briefly reviewed. A U(1) field gauging the global charge symmetry and an SU(2) field gauging the global spin-rotational symmetry are introduced to study the two-dimensional $t-J$ model in the limit $t\gg J$. The MIC as a clue to the understanding of the ``pseudogap'' (PG) phase, is attributed to the competition between the short-range antiferromagnetic order and dissipative motion of charge carriers coupled to the slave-particle gauge field. The composite particle formed by binding the charge carrier (holon) and spin excitation (spinon) via the slave particle gauge field exhibits a number of peculiar properties, and the calculated results are in good agreement with experimental data for both PG and ``strange metal'' phases. Connections to other gauge field approaches in studying the strong correlation problem are also briefly outlined.

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P. A. Marchetti, Z. B. Su, L. Yu. 2007-01-13. Spin-charge gauge approach to metal-insulator crossover and transport properties in High-T$_c$ cuprates. https://doi.org/10.1088/0953-8984%2F19%2F12%2F125212

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