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Metal-insulator crossover in high T-c cuprates: A gauge field approach

文献类型：会议论文

作者Marchetti, PA; Su, ZB; Yu, L
出版日期2002
会议日期SEP 25-28, 2001
会议地点MUMBAI, INDIA
关键词TEMPERATURE NORMAL-STATE SINGLE-CRYSTALS LA2-XSRXCUO4 RESISTIVITY MAGNETORESISTANCE SUPERCONDUCTORS BOSONIZATION TRANSPORT FERMIONS INPLANE
卷号58
期号5-6
DOI10.1007/s12043-002-0175-4
页码803-808
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.
会议录PRAMANA-JOURNAL OF PHYSICS
会议录出版者INDIAN ACADEMY SCIENCES
会议录出版地BANGALORE
语种英语
URL标识查看原文
ISSN号0304-4289
WOS研究方向Physics
源URL[http://ir.itp.ac.cn/handle/311006/23745]  
专题SCI会议论文
作者单位1.Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy
2.Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
3.Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy
4.Int Ctr Theoret Phys, I-34100 Trieste, Italy
推荐引用方式
GB/T 7714		 Marchetti, PA,Su, ZB,Yu, L. Metal-insulator crossover in high T-c cuprates: A gauge field approach[C]. 见:. MUMBAI, INDIA. SEP 25-28, 2001.

入库方式： OAI收割

来源：理论物理研究所

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