The Experts below are selected from a list of 234 Experts worldwide ranked by ideXlab platform

Hong-shi Zong - One of the best experts on this subject based on the ideXlab platform.

  • Influence of gauge boson mass on the staggered Spin Susceptibility
    Physical Review D, 2014
    Co-Authors: Feng-yao Hou, Zhu-fang Cui, Hong-tao Feng, Yu Jiang, Hong-shi Zong
    Abstract:

    Based on the study of the linear response of the fermion propagator in the presence of an external scalar field, we calculate the staggered Spin Susceptibility in the low-energy limit in the framework of the Dyson-Schwinger approach. We analyze the effect of a finite gauge boson mass on the staggered Spin Susceptibility in both the Nambu phase and the Wigner phase. It is found that the gauge boson mass suppresses the staggered Spin Susceptibility in the Wigner phase. In addition, we try to give an explanation for why the antiferromagnetic Spin correlation increases when the doping is lowered.

  • Staggered Spin Susceptibility and chiral phase transition in thermal QED(3)
    Physical Review D, 2013
    Co-Authors: Hong-tao Feng, Yu-qing Zhou, Pei-lin Yin, Hong-shi Zong
    Abstract:

    Based on the truncated Dyson-Schwinger equation, we first study the influence of the vertex correction on the staggered Spin Susceptibility chi(s). The numerical results show that the vertex correction plays an important role in the study of the staggered Spin Susceptibility. We then generalize the above work to the case of finite temperature. It is found for the first time that, as the temperature increases, the chiral condensate vanishes at the phase transition point where chi(s) reveals an obvious skip, and therefore as a physical observable, the staggered Spin Susceptibility could be regarded as the order parameter of chiral phase transition in QED(3).

Hong-tao Feng - One of the best experts on this subject based on the ideXlab platform.

  • Influence of gauge boson mass on the staggered Spin Susceptibility
    Physical Review D, 2014
    Co-Authors: Feng-yao Hou, Zhu-fang Cui, Hong-tao Feng, Yu Jiang, Hong-shi Zong
    Abstract:

    Based on the study of the linear response of the fermion propagator in the presence of an external scalar field, we calculate the staggered Spin Susceptibility in the low-energy limit in the framework of the Dyson-Schwinger approach. We analyze the effect of a finite gauge boson mass on the staggered Spin Susceptibility in both the Nambu phase and the Wigner phase. It is found that the gauge boson mass suppresses the staggered Spin Susceptibility in the Wigner phase. In addition, we try to give an explanation for why the antiferromagnetic Spin correlation increases when the doping is lowered.

  • Staggered Spin Susceptibility and chiral phase transition in thermal QED(3)
    Physical Review D, 2013
    Co-Authors: Hong-tao Feng, Yu-qing Zhou, Pei-lin Yin, Hong-shi Zong
    Abstract:

    Based on the truncated Dyson-Schwinger equation, we first study the influence of the vertex correction on the staggered Spin Susceptibility chi(s). The numerical results show that the vertex correction plays an important role in the study of the staggered Spin Susceptibility. We then generalize the above work to the case of finite temperature. It is found for the first time that, as the temperature increases, the chiral condensate vanishes at the phase transition point where chi(s) reveals an obvious skip, and therefore as a physical observable, the staggered Spin Susceptibility could be regarded as the order parameter of chiral phase transition in QED(3).

Colin V. Parker - One of the best experts on this subject based on the ideXlab platform.

  • Spin Susceptibility above the superfluid onset in ultracold fermi gases
    Physical Review Letters, 2021
    Co-Authors: Yun Long, Feng Xiong, Colin V. Parker
    Abstract:

    Ultracold atomic Fermi gases can be tuned to interact strongly, which produces a display of spectroscopic signatures above the superfluid transition reminiscent of the pseudogap in cuprates. However, the extent of the analogy can be questioned since many thermodynamic quantities in the low temperature Spin-imbalanced normal state can be described successfully using Fermi liquid theory. Here we present Spin Susceptibility measurements across the interaction strength-temperature phase diagram using a novel radio frequency technique with ultracold $^{6}\mathrm{Li}$ gases. For all significant interaction strengths and at all temperatures we find the Spin Susceptibility is reduced compared to the equivalent value for a noninteracting Fermi gas. At unitarity, we can use the local density approximation to extract the integrated Spin Susceptibility for the uniform gas as a function of temperature, which at high temperatures is generally less than theoretically predicted. At low temperatures, our data lie within the range of theoretical predictions, although we can also describe the entire curve using a very simple one-parameter mean field model with monotonically increasing Spin Susceptibility.

  • Spin Susceptibility Above the Superfluid Onset in Ultracold Fermi Gases
    arXiv: Quantum Gases, 2020
    Co-Authors: Yun Long, Feng Xiong, Colin V. Parker
    Abstract:

    Ultracold atomic Fermi gases can be tuned to interact strongly, where they display spectroscopic signatures above the superfluid transition reminiscent of the pseudogap in cuprates. However, the extent of the analogy can be questioned, since thermodynamic quantities in the low temperature Spin-imbalanced normal state can be described successfully using Fermi liquid theory. Here we present Spin Susceptibility measurements across the interaction strength-temperature phase diagram using a novel radiofrequency technique with ultracold $^6\textrm{Li}$ gases. For all significant interaction strengths and at all temperatures we find the Spin Susceptibility is reduced compared with the equivalent value for a non-interacting Fermi gas, with the low temperature results consistent with previous studies. However, our measurements extend to higher temperatures, where we find that the reduction persists consistently with a mean-field scenario. At unitarity, we can use the local density approximation to extract the Spin Susceptibility for the uniform gas, which is well described by mean-field models at temperatures from the superfluid transition to the Fermi temperature.

Pengfei Zhuang - One of the best experts on this subject based on the ideXlab platform.

  • paramagnetic meissner effect and finite Spin Susceptibility in an asymmetric superconductor
    Physical Review B, 2006
    Co-Authors: Lianyi He, Pengfei Zhuang
    Abstract:

    A general analysis of Meissner effect and Spin Susceptibility of a uniform superconductor in an asymmetric two-component fermion system is presented in nonrelativistic field theory approach. We found that the pairing mechanism dominates the magnetization property of superconductivity and the asymmetry enhances the paramagnetism of the system. At the turning point from BCS to breached pairing superconductivity, the Meissner mass squared and Spin Susceptibility are divergent at zero temperature. In the breached pairing state induced by chemical potential difference and mass difference between the two kinds of fermions, the system goes from paramagnetism to diamagnetism, when the mass ratio of the two species increases.

  • Paramagnetic Meissner Effect and Finite Spin Susceptibility in an Asymmetric and Nonrelativistic Superconductor
    2005
    Co-Authors: Meng Jin, Pengfei Zhuang
    Abstract:

    A general analysis of Meissner effect and Spin Susceptibility of a uniform superconductor in an asymmetric two-component fermion system is presented in nonrelativistic field theory approach. We found that, the pairing mechanism dominates the magnetization property of superconductivity, and the asymmetry enhances the paramagnetism of the system. At the turning point from BCS to breached pairing superconductivity, the Meissner mass squared and Spin Susceptibility are divergent at zero temperature. In the breached pairing state induced by chemical potential difference and mass difference between the two kinds of fermions, the system goes from paramagnetism to diamagnetism, when the mass ratio of the two species increases.

T. M. Klapwijk - One of the best experts on this subject based on the ideXlab platform.