Bulk and surface electronic structure of trigonal structured PtBi2 studied by angle-resolved photoemission spectroscopy
Q. Yao, Y. P. Du, X. J. Yang, Y. Zheng, D. F. Xu, X. H. Niu, H. F. Yang, P. Dudin, T. K. Kim, M. Hoesch, I. Vobornik, Z. -A. Xu, X. G. Wan, D. L. Feng, D. W. Shen
PtBi2 with a layered trigonal crystal structure was recently reported to exhibit an unconventional large linear magnetoresistance, while the mechanism involved is still elusive. Using high resolution angle-resolved photoemission spectroscopy, we present a systematic study on its bulk and surface electronic structure. Through careful comparison with first-principle calculations, our experiment distinguishes the low-lying bulk bands from entangled surface states, allowing the estimation of the real stoichiometry of samples. We find significant electron doping in PtBi2, implying a substantial Bi deficiency induced disorder therein. We discover a Dirac-cone-like surface state on the boundary of the Brillouin zone, which is identified as an accidental Dirac band without topological protection. Our findings exclude quantum-limit-induced linear band dispersion as the cause of the unconventional large linear magnetoresistance.
Intrinsic Electronic Structure and Nodeless Superconducting Gap of $\mathrm{YBa_{2} Cu_{3} O_{7-δ} }$ Observed by Spatially-Resolved Laser-Based Angle Resolved Photoemission Spectroscopy
Time-Resolved Photoemission Spectroscopy of Quantum Materials Using High Harmonic Generation: Probing Electron-Phonon Interactions and Non-Equilibrium Dynamics
Institute for Solid State Physics, The University of Tokyo（东京大学固体物理研究所）；Trans-scale Quantum Science Institute, The University of Tokyo（东京大学跨尺度量子科学研究所）；Material Innovation Research Center, The University of Tokyo（东京大学材料创新中心）
Temperature dependence of the angle resolved photoemission spectra in the undoped cuprates: self-consistent approach to the t-J-Holstein model
我们开发了一种新的自洽方法来研究角分辨光电子能谱（ARPES）的一个洞的t-J-Holstein模型给出完美的协议与数字精确的Diagrammatic Monte Carlo数据在零温度下的所有制度的电子-声子耦合。推广到有限温度的方法，我们发现，在未掺杂的铜酸盐的ARPES的异常温度依赖性的解释合作的相互作用的耦合的孔的磁波动和强的电子-声子相互作用。
Orbital Characters Determined from Fermi Surface Intensity Patterns using Angle-Resolved Photoemission Spectroscopy
为了确定铁基超导体Ba $_{0.6}$ K $_{0.4}$ Fe $_{2}$ As $_{2}$和FeSe $_{0.45}$ Te $_{0.55}$的各种费米面口袋上的轨道特征，本文介绍了一种计算光电发射矩阵元的方法。我们比较我们的模拟与各种实验配置的光束方向和光偏振的实验数据。我们发现，从角度分辨的光电子能谱测量费米表面映射和能量-动量图沿高对称线显示的光电子强度图案表现出不对称性携带宝贵的信息探测的状态的性质，信息被破坏后的数据对称化过程中经常进行的角度分辨的光电子能谱数据的分析。我们的模拟结果与费米面一致，费米面主要来源于这些材料中的$d_{xy}$、$d_{xz}$和$d_{yz}$轨道。
Reply to "Comment on arXiv:1012.1484v1 Structural origin of apparent Fermi surface pockets in angle-resolved photoemission of Bi_2Sr_{2-x}La_xCuO_{6+δ} by King et al."
Polarization-Dependent Three-Dimensional Angle-Resolved Photoemission Spectroscopy of BaFe$_{1.8}$Co$_{0.2}$As$_{2}$
我们利用偏振和光子能量相关的角度分辨光电子能谱研究了一种稍过掺杂的铁磷属元素化物超导体BaFe $_{1.8}$ Co $_{0.2}$ As $_{2}$的三维电子结构，包括布里渊区中心的轨道特征.观察到具有$d_{xz/yz}$和$d_{xy/x^2-y^2}$轨道的两个空穴费米面（FS），但是没有出现根据自旋涨落超导机制理论具有节点的$d_{z^2}$空穴FS。这些结果表明，在区域中心的孔FS处不会出现节点。
Dependence of Band Renormalization Effect on the Number of Copper-oxide Layers in Tl-based Copper-oxide Superconductor using Angle-resolved Photoemission Spectroscopy
Two pseudogaps with different energy scales at the antinode of the high-temperature Bi$_2$Sr$_2$CuO$_6$ superconductor using angle-resolved photoemission spectroscopy
我们已经进行了高分辨率角分辨光电子能谱的单层铜酸盐Bi $_2$ Sr $_2$ CuO $_6$澄清的赝能隙的起源。通过使用不同的光子能量，我们已经成功地直接观察到两个不同的赝能隙与两个不同的能量尺度共存的波腹区域：一个反映了$d_{x^2-y^2}$波配对强度，而另一个具有较大的能量尺度，表明起源不同于超导。观察到的双赝能隙行为提供了一个关键，以充分理解赝能隙现象的铜酸盐。
Underlying Fermi surface of Sr$_{14-x}$Ca$_x$Cu$_{24}$O$_{41}$ in two-dimensional momentum space observed by angle-resolved photoemission spectroscopy
我们已经进行了角分辨光电子能谱研究的双腿梯形系统Sr $_{14-x}$ Ca $_x$ Cu $_{24}$ O $_{41}$与$x$ = 0和11。由低能谱权映射确定的“底层费米面”表明了电子结构的准一维性质。对于$x$ =0，观察到由电荷密度波引起的能隙，并且随着Ca取代，能隙趋于闭合。即使在$x$ =11中也没有准粒子峰，这与二维高$T_c$铜酸盐相反，意味着与空穴结晶相关的强载流子局域化。
Identification of Nodal Kink in Electron-Doped (Nd$_{1.85}$Ce$_{0.15}$)CuO$_4$ Superconductor from Laser-Based Angle-Resolved Photoemission Spectroscopy
对电子掺杂的（Nd $_{1.85}$ Ce $_{0.15}$）CuO $_4$高温超导体进行了高分辨激光角分辨光电子能谱测量。我们揭示了一个明确的扭结在$\sim$ 60毫电子伏的色散沿（0，0）-（$π$，$π$）节方向，伴随着峰-谷-驼峰功能的光电子能谱。这表明，在电子掺杂的超导体中，节点电子与集体激发（玻色子）耦合，声子是最有可能的玻色子候选者。这一发现建立了一个普遍性的节点电子耦合在空穴和电子掺杂的高温铜氧化物超导体。
Angle-resolved photoemission spectroscopy of Na-doped Ca2CuO2Cl2 single crystals: Fingerprints of a magnetic insulator in a heavily underdoped superconductor
Dynamic spin-response function of the high-temperature Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ superconductor form angle resolved photoemission spectra
我们介绍了一种计算动态响应函数的形式主义使用实验单粒子格林函数来自角分辨光电子能谱（ARPES）。作为这个过程的一个例子，我们估计了铜氧化物超导体Bi $_2$ Sr $_2$ CaCu $_2$ O $_{8+δ}$的动态自旋响应.我们发现很好的协议与超导态中子数据，特别是$(π,π)$共振与其不寻常的“反向磁振子”的色散。我们预计我们的形式主义也将是有用的解释从其他光谱，如光学和拉曼响应的结果。
Anisotropic dressing of charge-carriers in the electron-doped cuprate superconductor Sm(1.85)Ce(0.15)CuO(4) from angle-resolved photoemission measurements
Measurements of electronic band structure in CeCoGe$_3$ by angle-resolved photoemission spectroscopy
University of California, Davis（加州大学戴维斯分校）；Lawrence Berkeley National Lab（劳伦斯伯克利国家实验室）；Virginia Tech（弗吉尼亚理工大学）；Virginia Tech National Security Institute（弗吉尼亚理工学院国家安全研究所）；Virginia Tech Center for Quantum Information Science and Engineering（弗吉尼亚理工学院量子信息科学与工程中心）
Orbital character variation of the Fermi surface and doping dependent changes of the dimensionality in BaFe2-xCoxAs2 from angle-resolved photoemission spectroscopy
