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Metal-insulator crossover in high T-c cuprates: A gauge field approach
Marchetti, PA; Su, ZB; Yu, L; Marchetti, PA , Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
2002
发表期刊PRAMANA-JOURNAL OF PHYSICS
ISSN0304-4289
卷号58期号:41035页码:803-808
摘要A 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.
部门归属Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy; Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Int Ctr Theoret Phys, I-34100 Trieste, Italy
关键词Temperature Normal-state Single-crystals La2-xsrxcuo4 Resistivity Magnetoresistance Superconductors Bosonization Transport Fermions Inplane
学科领域Physics
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收录类别SCI
WOS记录号WOS:000176937700016
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13527
专题理论物理所1978-2010年知识产出
通讯作者Marchetti, PA , Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
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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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