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33 papers · 2 filters
Exact solution of the one-dimensional Hubbard model with arbitrary boundary magnetic fields
Yuan-Yuan Li, Junpeng Cao, Wen-Li Yang +2
The one-dimensional Hubbard model with arbitrary boundary magnetic fields is solved exactly via the Bethe ansatz methods. With the coordinate Bethe ansatz in the charge sector, the…
Observation of well-defined quasi-particle over a wide energy range in quasi-2D system
L. -L. Jia, Z. -H. Liu, Y. -P. Cai +12
We report the observation by angle-resolved photoemission spectroscopy measurements of a highly anisotropic Dirac-cone structure in high quality SrMnBi2 crystals. We reveal a well-…
Nematic Metal and Antiferromagnetic Insulator on Hexagonal Kagome Lattice
Heng-Fu Lin, Yao-Hua Chen, Hai-Di Liu +2
Hexagonal Kagome lattice is a multiband system with a quadratic band crossing point, in contrast with honeycomb lattice with linear band crossing point, which has exotic correlated…
Topological insulator states in quasi-one-dimensional sawtooth chain
Zhihao Xu, Linhu Li
We report the discovery of flatten Bloch bands with nontrivial topological numbers in a quasi-one-dimensional sawtooth chain. We present the nearly flat-band with a obvious gap and…
The synthesis and characterization of 1111-type diluted magnetic semiconductors (La1-xSrx)(Zn1-xTMx)AsO (TM = Mn, Fe, Co)
Jicai Lu, Huiyuan Man, Cui Ding +9
The doping effect of Sr and transition metals Mn, Fe, Co into the direct-gap semiconductor LaZnAsO has been investigated. Our results indicate that the single phase ZrCuSiAs-type t…
Coupling of magnetic order to planar Bi electrons in the anisotropic Dirac metals AMnBi2 (A = Sr, Ca)
Y. F. Guo, A. J. Princep, X. Zhang +5
We report powder and single crystal neutron diffraction measurements of the magnetic order in AMnBi2 (A = Sr and Ca), two layered manganese pnictides with anisotropic Dirac fermion…