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The holographic fermions dual to massive gravity

Science China(Physics,Mechanics & Astronomy) 2016年第10期59卷 49-57页

作者： Li-Qing Fang Xiao-Mei Kuang Jian-Pin Wu School of Physics and Electronic Information Shangrao Normal UniversityShangrao 334000China Department of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Key Laboratory of High Temperature Superconductors Shanghai 200444China Instituto de Fisica Pontificia Universidad Catolica de ValparaisoCasilla 4059ValparaisoChile Institute of Gravitation and Cosmology Department of PhysicsSchool of Mathematics and PhysicsBohai UniversityJinzhou 121013China

We investigate the properties of the spectral function of the fermionic operator in the field theory which is dual to a 4-dimensional massive gravity. We first study the Fermi surface and the dispersion relation in the dual boundary theory. We find that as the massive parameters is decreased, the Fermi momentum becomes lower and the low energy excitation near Fermi surface behaves more like non-Fermi liquid. Then, we introduce a dipole coupling in the bulk theory and explore the emergence of a gap in the fermionic spectral function. It is found that larger critical dipole coupling is needed to open the gap than that in Einstein gravity. Accordingly,in the field theory dual to massive gravity, it requires stronger negative dipole coupling to generate the marginal Fermi liquid.

关键词：爱因斯坦引力费米子非费米液体全息色散关系边界理论费米表面谱函数

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Transport properties,upper critical field and anisotropy of Ba(Fe_(0.75)Ru_(0.25))_2As_2 single crystals

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Science China(Physics,Mechanics & Astronomy) 2012年第12期55卷 2259-2263页

作者： XING Jie SHEN Bing ZENG Bin LIU JianZhong DING XiaXin WANG ZhiHe YANG Huan WEN HaiHu Center for Superconducting Physics and Materials National Laboratory of Solid State Mierostructures and Department of Physics Nanjing University Nanjing 210093 China National Laboratory for Superconductivity Institute of Physics Chinese Academy of Sciences P.O.Box 603 Beijing 100190 China

The temperature and angle dependent resistivity of Ba(Fe 0.75 Ru 0.25) 2 As 2 single crystals were measured in magnetic fields up to 14 *** temperature dependent resistivity with the magnetic field aligned parallel to c-axis and ab-planes allow us to derive the slope of dH ab c2 /dT and dH c c2 /dT near T c yielding an anisotropy ratio Γ = dH ab c2 /dT/dH c c2 /dT ≈ *** scaling the curves of resistivity *** measured at a fixed temperature but different magnetic fields within the framework of the anisotropic Ginzburg-Landau theory,we obtained the anisotropy in an alternative *** we found that the anisotropy(m c /m ab) 1/2 was close to *** value is similar to that in Ba0.6K0.4Fe2As2(K-doped Ba122) and Ba(Fe 0.92 Co 0.08) 2 As 2(Co-doped Ba122).This suggests that the 3D warping effect of the Fermi surface in Ru-doped samples may not be stronger than that in the K-doped or Co-doped Ba122 samples,therefore the possible nodes appearing in Ru-doped samples cannot be ascribed to the 3D warping effect of the Fermi surface.

关键词：各向异性临界磁场 Ginzburg-Landau理论传输性能单晶温度变化费米表面 3D模型

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Asphericity in the Fermi Surface and Fermi Energy of Na－K,Na－Rb and Na－Cs Binary Alloys

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Communications in Theoretical Physics 2002年第9期37卷 365-369页

作者： MinalH.Patel A.M.Vora 等 DepartmentofPhysics SardarPatelUniversityVallabhVidyanagar388120GujaratIndia

Detailed theoretical investigations into asphericity in the Fermi surface (FS) and Fermi energy (FE) ofNa1_xKx, Na1_xRbx, and Na1_xCsx binary solid solutions are carried out for the first time. The alloying behavior ofthe K, Rb, and Cs with the Na generates the Fermi surface distortion (FSD) of bce simple metals. The FS of Na-K,Na-Rb, and Na-Cs solid solution is a distorted sphere with the largest deviation along [110]. We have found that theimpact of local-field correction function on FSD is maximun at [100] point and minimum at [111] point. The exchangeand correlation effect is found to suppress the value of FE.

关键词：双金属合金费米表面费米能

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Bi—2212单晶超导材料的进展

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稀有金属快报 1997年第3期16卷 19-20页

作者：黄金昌

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Isoscalar Giant Monopole Resonance in Relativistic Continuum Random Phase Approximation

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近代物理研究所和兰州重离子加速器实验室年报：英文版 2008年第1期 17-18页

作者： Cao Ligang Yang Ding Ma Zhongyu Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator of Lanzhou China China Institute of Atomic Energy Beijing China Communication University of China Beijing China.

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