INFLUENCE OF A UNIFORM MAGNETIC FIELD ON DYNAMICAL CHIRAL SYMMETRY BREAKING IN QED3
INFLUENCE OF A UNIFORM MAGNETIC FIELD ON DYNAMICAL CHIRAL SYMMETRY BREAKING IN QED3
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DOI：
10.1142/s0217732312500265
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发表时间：
2012-03
影响因子：
1.4
通讯作者：
Jian-Feng Li;H. Feng;Yu Jiang;Wei-Min Sun;H. Zong
中科院分区：
文献类型：
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作者：
Jian-Feng Li;H. Feng;Yu Jiang;Wei-Min Sun;H. Zong
在有效QED 3理论中研究了均匀磁场下d波高温铜氧化物超导体的动力学手征对称性破缺。在零温度下，外磁场通过在带电holon的凝聚体中产生涡旋来诱导混合态。不断增长的磁场抑制了超流密度，从而降低了规范场质量，规范场质量通过Anderson-Higgs机制打开。通过数值求解Dyson-Schwinger能隙方程，我们证明了当磁场强度H大于临界值Hc，费米子味数N小于临界值Nc时，无质量费米子通过DCSB机制获得动力学能隙.此外，它被发现，Nc和动力学费米子间隙增加的磁场H的增长。我们的结果可望在高温铜氧化物超导现象中得到检验。
We study dynamical chiral symmetry breaking (DCSB) in an effective QED3 theory of d-wave high temperature cuprate superconductors under a uniform magnetic field. At zero temperature, the external magnetic field induces a mixed state by generating vortices in the condensate of charged holons. The growing magnetic field suppresses the superfluid density and thus reduces the gauge field mass which is opened via the Anderson–Higgs mechanism. By numerically solving the Dyson–Schwinger gap equation, we show that the massless fermions acquires a dynamical gap through DCSB mechanism when the magnetic field strength H is above a critical value Hc and the fermion flavors N is below a critical value Nc. Further, it is found that both Nc and the dynamical fermion gap increase as the magnetic field H grows. It is expected that our result can be tested in phenomena in high temperature cuprate superconductors.