Mesoscopic magnetism and superconductivity

Mesoscopic magnetism and quantum chaos

All seven physics STAIRSTEP students and 15 undergraduate students have participated to a talk about the orbital magnetic susceptibility of electrons in a rectangular box. Mesoscopic systems, such as small metal particles and quantum dots, exhibit many novel properties due to the coherent effect and finite-size quantization. In the mesoscopic regime, magnetic properties are sensitive to whether...

Mesoscopic Effects in Superconductivity

Dilute Annealed Magnetism and High Temperature Superconductivity

It has become increasingly appreciated that the strong antiferromagnetic coupling between in-plane Cu atoms in most of the high-temperature superconductors is not merely fortuitous [ 1-4 ]. However a coherent understanding of exactly how the magnetic interactions influence the observed superconductivity has been elusive. Here we focus on the prototype compound, La2_xSrxCuO 4 ( " 2 1 4 " ) . We ...

Magnetism and Superconductivity by Nmr Study

Results of NMR measurement on high Tc oxide superconductor are reviewed together with heavy electron superconductor. In high Tc compounds, superconductivity and antiferromagnetism compete with each other, while in heavy electron system both coexist or compete. The property of Cooper pair is discussed in high T , superconductor together with the heavy electron superconductor. In the several syst...

Unconventional superconductivity and magnetism in CePt3Si1−xGex

CePt3Si is a novel ternary compound exhibiting antiferromagnetic order at TN ≈ 2.2 K and superconductivity (SC) at Tc ≈ 0.75 K. Large values of H ′ c2 ≈ −8.5 T/K and Hc2(0) ≈ 5 T indicate Cooper pairs formed out of heavy quasiparticles. The mass enhancement originates from Kondo interaction with a characteristic temperature TK ≈ 8 K. NMR and μSRmeasurements evidence coexistence of SC and long r...