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题名: Metal-insulator crossover in high T-c cuprates: A gauge field approach
作者: Marchetti, PA ;  Su, ZB ;  Yu, L
刊名: PRAMANA-JOURNAL OF PHYSICS
出版日期: 2002
卷号: 58, 期号:41035, 页码:803-808
关键词: TEMPERATURE NORMAL-STATE ;  SINGLE-CRYSTALS ;  LA2-XSRXCUO4 ;  RESISTIVITY ;  MAGNETORESISTANCE ;  SUPERCONDUCTORS ;  BOSONIZATION ;  TRANSPORT ;  FERMIONS ;  INPLANE
学科分类: Physics
通讯作者: Marchetti, PA , Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy.
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
英文摘要: 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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000176937700016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13527
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Marchetti, PA,Su, ZB,Yu, L. Metal-insulator crossover in high T-c cuprates: A gauge field approach[J]. PRAMANA-JOURNAL OF PHYSICS,2002,58(41035):803-808.
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