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

doi:10.1007/s12043-002-0175-4

	Metal-insulator crossover in high T-c cuprates: A gauge field approach
	Marchetti, PA ; Su, ZB ; Yu, L
	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
DOI	10.1007/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
内容类型	会议论文
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.Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy 3.Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China 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.