arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0711.0776cond-mat.supr-con
收藏

d波超导体混合态的量子振荡

Quantum Oscillations in the mixed state of d-wave superconductor

A. Melikyan, O. Vafek

摘要:

我们表明,准粒子态的低能量密度的混合态的超洁净d波超导体的特点是显着的量子振荡的制度,回旋频率$\hbarω_c \ll Δ_0$,d波配对间隙。这种振荡作为磁场B的函数被认为是由于波矢量$(\pm k_D,\pm k_D)$附近的d波准粒子的涡晶格的节间散射以及它们的塞曼耦合。振荡的周期性由条件$k_D \sqrt{hc/(eB)} \equiv k_D' \sqrt{hc/(eB')}\pmod {2π}$设定。我们发现,有额外的结构在每个周期内增长的狄拉克节点各向异性增加的复杂性。

英文摘要:

We show that the low-energy density of quasiparticle states in the mixed state of ultra-clean d-wave superconductors is characterized by pronounced quantum oscillations in the regime where the cyclotron frequency $\hbarω_c \ll Δ_0$, the d-wave pairing gap. Such oscillations as a function of magnetic field B are argued to be due to the internodal scattering of the d-wave quasiparticles near wavevectors $(\pm k_D,\pm k_D)$ by the vortex lattice as well as their Zeeman coupling. The periodicity of the oscillations is set by the condition $k_D \sqrt{hc/(eB)} \equiv k_D' \sqrt{hc/(eB')}\pmod {2π}$. We find that there is additional structure within each period which grows in complexity as the Dirac node anisotropy increases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑