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分享：Frontiers of Physics 2009,4(4) (SCIE收录)

已有 6255 次阅读 2009-9-14 12:16 |个人分类:Frontiers of Physics|系统分类:科研笔记

Cover illustration

Vol. 4, No. 4, 2009

Fermi surface of iron-based superconductor, Ba_0.6K_0.4Fe₂As₂ (T_c=35 K), measured by high resolution angle-resolved photoemission spectroscopy (ARPES). Near the center Γ(0,0) point, two hole-like Fermi surface sheets are observed while near the corner M(ß,ß) point, two strong Fermi spots are observed. The two Fermi surface sheets near the Γ point show different superconducting gap: the inner one shows larger gap (10 ― 12 meV) while the outer one has a smaller gap (7 ― 8 meV). No gap node is observed on both Fermi surface sheets which is consistent with s-wave superconducting gap symmetry. Superconducting gap opening is also observed at the M(π,π) point with a gap size of 10 meV. The two Fermi surface spots near the M point are gapped below T_c but the gap persists above T_c. The rich and detailed superconducting gap information will provide key insights in understanding pairing mechanism in the iron-based superconductors. Please refer to the article “Band structure, Fermi surface and superconducting gap in FeAs-based superconductors revealed by angle-resolved photoemission spectroscopy” by Professor Xing-jiang ZHOU (周兴江) et al., pp 427―432, in this issue. [Photo credits: Prof. Xing-jiang ZHOU (周兴江) (Institute of Physics, Chinese Academy of Sciences, China)]

Special Section: Iron-based Superconductors

427 Band structure, Fermi surface and superconducting gap in FeAs-based superconductors revealed by
angle-resolved photoemission spectroscopy

Xing-jiang ZHOU (周兴江) , Guo-dong LIU (刘国东), Hai-yun LIU (刘海云), Lin ZHAO (赵林),
Wen-tao ZHANG (张文涛), Xiao-wen JIA (贾小文), Jian-qiao MENG (孟建桥)

433 A unified description of cuprate and iron arsenide superconductors

Mike GUIDRY, Yang SUN (孙扬), Cheng-li WU (吴成礼)

447 Theory for superconductivity in iron pnictides at large Coulomb U limit

Wei-qiang CHEN (陈伟强), Kai-yu YANG (杨开宇), Yi ZHOU (周毅), Fu-chun ZHANG (张富春)

455 Magneto-thermopower of parent compound LaFeAsO

Zeng-wei ZHU (朱曾伟), Qian TAO (陶前), Yu-ke LI (李玉科), Mi HE (何咪), Guang-han CAO (曹光旱), Zhu-an XU (许祝安)

459 Optical properties of FeAs-based parent compound: A comparative study for polycrystalline EuFe₂As₂ and LaFeAsO

Wan-zheng HU (胡婉铮), Jing DONG (董靖), Gang LI (李岗), Zheng LI (李政), Ping ZHENG (郑萍),
Gen-fu CHEN (陈根富), Jian-lin LUO (雒建林), Nan-lin WANG (王楠林)

464 Studies on the superconductivity for the “111” type iron arsenide superconductor

Xian-cheng WANG (望贤成), Qing-qing LIU (刘清青), Liu-xiang YANG (杨留响), Zheng DENG (邓正),
Yu-xi LÜ (吕玉玺), Wei-bo GAO (高伟波), Si-jia ZHANG (张思佳), Ri-cheng YU (禹日成), Chang-qing JIN (靳常青)

Atomic, Molecular, and Optical Physics

469 Advances in surface plasmon resonance-based high throughput biochips

San-jun ZHANG (张三军), Lotfi BERGUIGA, Juan ELEZGARAY, Nicolas HUGO, Wen-xue LI (李文雪),
Thibault ROLAND, He-ping ZENG (曾和平), Francoise ARGOUL

481 Coherent population transfer in four-level ladder systems by single frequency-chirped laser pulse

Xiao-hong LI (李小红), Xian-zhou ZHANG (张现周), Rui-zhou ZHANG (张瑞州)

Condensed Matter and Materials Physics

487 One-dimensional self-assembly of inorganic nanoparticles

Tao HU (胡涛), Yan GAO (高燕), Zhen-long WANG (王振龙) , Zhi-yong TANG (唐智勇)

497 Discrete breathers in a two-dimensional Morse lattice with an on-site harmonic potential

Bin-bin LÜ (吕彬彬), Qiang TIAN (田强)

505 Preparation of carbon fiber/ZnO core-shell structure by a simple method

Kai DU (杜凯) , Rong-hui WEI (魏荣慧), Qing-dong CHEN (陈庆东), Jing-han YOU (尤景汉), Hai-bin YANG (杨海滨)