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Marchetti, PA; De Leo, L; Orso, G; Su, ZB; Yu, L; Marchetti, PA , Ist Nazl Fis Nucl, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
Spin-charge gauge approach to the pseudogap phase of high-T-c cuprates: Theory versus experiments
Source PublicationPHYSICAL REVIEW B
KeywordHigh-temperature Superconductors Normal-state Resistivity Electronic Specific-heat D-wave Superconductivity Quantum Critical-point Fermi-liquid Behavior Valence Bond State Axis Resistivity Single-crystals j Model
AbstractWe consider as a clue to the understanding of the pseudogap phase in high-T-c superconductors the metal-insulator crossover in underdoped, nonsuperconducting cuprates as temperature decreases and a similar crossover in superconducting cuprates when a strong magnetic field suppresses superconductivity. A spin [SU(2)] and charge [U(1)] Chern-Simons gauge field theory, applied to the t-J model, is developed to describe this striking phenomenon. Two length scales have been derived from the theory: the antiferromagnetic correlation length xiapproximate to(deltaparallel toln deltaparallel to)(-1/2), where delta is the doping concentration, and the thermal de Broglie wavelength of the dissipative charge carriers lambda(T)approximate to(Tdelta/t)(-1/2), where T is the temperature, t the hopping integral. At low temperatures xiless than or equal tolambda(T), the antiferromagnetic short-range order dominates, and the charge carriers become localized, showing insulating behavior. On the contrary, at high temperatures xigreater than or similar tolambda(T), the dissipative motion of charge carriers prevails, exhibiting metallic conductivity. Furthermore, the gauge interaction induces binding of spinons (spin excitation) and holons (charge carrier) into "electron" resonance. This process introduces a new energy scale, the inverse recombination time, which turns out to be essential in the interpretation of the out-of-plane resistivity. The major steps in the theoretical derivation of these results, particularly the calculation of the current-current correlation function and the Green's function for the physical electron, are presented with some detail. The obtained theoretical results are systematically compared with the in-plane and out-of-plane resistivity data and the magnetoresistance data, as well as the nuclear magnetic relaxation data in the pseudogap regime. Very good agreement is obtained.
2004
ISSN1098-0121
Volume69Issue:2Pages:-
Subject AreaPhysics
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/14149
Collection理论物理所科研产出_SCI论文
Corresponding AuthorMarchetti, PA , Ist Nazl Fis Nucl, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
Recommended Citation
GB/T 7714
Marchetti, PA,De Leo, L,Orso, G,et al. Spin-charge gauge approach to the pseudogap phase of high-T-c cuprates: Theory versus experiments[J]. PHYSICAL REVIEW B,2004,69(2):-.
APA Marchetti, PA,De Leo, L,Orso, G,Su, ZB,Yu, L,&Marchetti, PA , Ist Nazl Fis Nucl, Dipartimento Fis G Galilei, I-35131 Padua, Italy..(2004).Spin-charge gauge approach to the pseudogap phase of high-T-c cuprates: Theory versus experiments.PHYSICAL REVIEW B,69(2),-.
MLA Marchetti, PA,et al."Spin-charge gauge approach to the pseudogap phase of high-T-c cuprates: Theory versus experiments".PHYSICAL REVIEW B 69.2(2004):-.
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