Spin-Phonon Coupling Control with Strain Gradient Structures and Their Excitation by Photon

2017.11.01

Hitoshi Tabata, University of Tokyo

We have experimentally confirmed an existence of strain gradient in the ultrathin films of iron garnets. Electrical and optical anomalies have been confirmed due to the spatial inversion symmetry breaking.

Development of detection and control of individual atoms in an optical lattice

2017.08.20

Kyoto University   Yoshiro Takahashi

Recently, a quantum gas microscopy(QGM) which is a technique of observing individual atoms with a single-site resolution for ultracold atoms loaded into a two-dimensional optical lattice has been developed.

Energy levels in carbon nanotubes

2017.08.01

Wataru Izumida, Tohoku University

Carbon nanotubes have been intensively investigated since their discovery.  Although understanding of electron spin properties is important from viewpoint on spintronics, it has been revealed in recent studies.

Universal Modeling of Weak Antilocalization using Pseudo-Random Number Generator

2017.07.05

Takaaki Koga, Hokkaido University

The weak localization/antilocalization, recognized as a precursory state of the Anderson localization, was elucidated both theoretically and experimentally already in 1980’s in the realm of “diffusion approximation” [1]. A theoretical model premised on the Rashba effect was then developed in 1990’s, shortly before the “gate-induced” weak localization-to-antilocalization transition was confirmed experimentally [2].  After this experimental confirmation, the weak antilocalization effect has become recognized as a useful tool for investigating the spin-orbit interaction (SOI) in various two-dimensional electron systems (2DES).  It is deemed that

Observation of phonon modes in a bottle microresonator

2017.07.03

Takashi Yamamoto, Osaka University

Whispering-gallery-mode (WGM) resonators with various geometries have actively studied in the past two decades.