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Marchetti, PA; Su, ZB; Yu, L; Marchetti, PA , Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
Metal-insulator crossover in high T-c cuprates: A gauge field approach
Source PublicationPRAMANA-JOURNAL OF PHYSICS
KeywordTemperature Normal-state Single-crystals La2-xsrxcuo4 Resistivity Magnetoresistance Superconductors Bosonization Transport Fermions Inplane
AbstractA metal-insulator crossover appears in the experimental data for in-plane resistivity of underdoped cuprates and a range of superconducting cuprates in the presence of a strong magnetic field suppressing superconductivity. We propose an explanation for this phenomenon based on a gauge field theory approach to the t-J model. In this approach, based on a formal spin-charge separation, the low energy effective action describes gapful spinons (with a theoretically derived doping dependence of the gap m(s)(2) similar to delta\In delta\) and holons with finite Fermi surface (epsilon(F) similar to tdelta) interacting via a gauge field whose basic effect on the spinons is to bind them into overdamped spin waves, shifting their gap by a damping term linear in T, which causes the metal-insulator crossover. The presence of a magnetic field perpendicular to the plane acts by increasing the damping, in turn producing a big positive transverse in-plane magnetoresistance at low T, as experimentally observed.
2002
ISSN0304-4289
Volume58Issue:41035Pages:803-808
Subject AreaPhysics
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13527
Collection理论物理所科研产出_SCI论文
Corresponding AuthorMarchetti, PA , Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
Recommended Citation
GB/T 7714
Marchetti, PA,Su, ZB,Yu, L,et al. Metal-insulator crossover in high T-c cuprates: A gauge field approach[J]. PRAMANA-JOURNAL OF PHYSICS,2002,58(41035):803-808.
APA Marchetti, PA,Su, ZB,Yu, L,&Marchetti, PA , Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy..(2002).Metal-insulator crossover in high T-c cuprates: A gauge field approach.PRAMANA-JOURNAL OF PHYSICS,58(41035),803-808.
MLA Marchetti, PA,et al."Metal-insulator crossover in high T-c cuprates: A gauge field approach".PRAMANA-JOURNAL OF PHYSICS 58.41035(2002):803-808.
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