μSR and DFT Investigations Quantum Electronic States of La2CuO4

概要

Muon is one of the elementary particle, sharing its classification as the fundamental particle
that have a half-integer spin (fermion) with the electron. Aside from the similarity on its spin,
muon particles are always being thought as a heavier version of the electron. Hence, its unstable
nature in the normal condition with the lifetime of 2.2 µs. It also has an antimatter version with
an opposite sign of charge, resulting two kinds of muon particle (a positively charged and a
negatively charged muons). Detailed comparisons with the other elementary particles are
summarized in the Table 1 In this universe, muon can be produced naturally by an interaction
of gases in the upper region of atmosphere with a sufficiently number of high-energy particles,
which was observed by Carl D. Anderson and Seth Neddermeyer in 1936 [1]. Two decades
later, Lee and Yang [2] proposed its theory that states that the parity conservation is exists in
the strong interaction, but it does not exist within weak interaction regimme. This theory leads
Garwin et al., to implant the muon into the solids to test the theory [3]. Here they observed that
the spin-polarized muon will retain its spin polarization when implanted into solid. ...

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