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

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.

32 pages, to appear in the special issue on "Correlated Electrons" of J. Phys.: Condens. Matt

References in corpus (2)

• Universal scaling behavior of the c-axis resistivity of high-temperature superconductors
• Self-localization of holes in a lightly doped Mott insulator

Cited by in corpus (5)

• Gauge approach to the specific heat in the normal state of cuprates
• Charge carriers with fractional exclusion statistics in cuprates
• Interplay of superconductivity and magnetism in a t-t'-J approach to high Tc cuprates
• Fractional statistics of charge carriers in the one- and two-dimensional t-J model. A hint for the cuprates?
• Superfluid density in cuprates: hints on gauge compositeness of the holes