Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Nojima, T."'
Publikováno v:
Phys. Rev. B 105, 075305 (2022)
We report the observation of fractional quantum Hall (FQH) effects in a two-dimensional electron gas (2DEG) confined to an InAs/AlGaSb quantum well, using a dual-gated Hall-bar device allowing for the independent control of the vertical electric fiel
Externí odkaz:
http://arxiv.org/abs/2112.05384
Electric quadrupolar state in a frustrated quantum magnet $\rm Tb_{2+\it \delta}Ti_{2-\it \delta}O_7$ has been studied by means of ultrasonic and magnetostriction measurements. A single crystal showed elastic anomaly at about 0.4 K, manifesting a lon
Externí odkaz:
http://arxiv.org/abs/2109.11876
Autor:
Satake, Y., Shiogai, J., Mazur, G. P., Kimura, S., Awaji, S., Fujiwara, K., Nojima, T., Nomura, K., Souma, S., Sato, T., Dietl, T., Tsukazaki, A.
Publikováno v:
Phys. Rev. Materials 4, 044202 (2020)
Three-dimensional topological insulators (3D-TIs) possess a specific topological order of electronic bands, resulting in gapless surface states via bulk-edge correspondence. Exotic phenomena have been realized in ferromagnetic TIs, such as the quantu
Externí odkaz:
http://arxiv.org/abs/2002.09292
Autor:
Harada, T., Sugawara, K., Fujiwara, K., Ito, S., Nojima, T., Takahashi, T., Sato, T., Tsukazaki, A.
Publikováno v:
Phys. Rev. Research 2, 013282 (2020)
We revealed the electrical transport through surface ferromagnetic states of a nonmagnetic metal PdCoO2. Electronic reconstruction at the Pd-terminated surface of PdCoO2 induces Stoner-like ferromagnetic states, which could lead to spin-related pheno
Externí odkaz:
http://arxiv.org/abs/1908.08173
Publikováno v:
Journal of Applied Physics,125, 223906 (2019)
We revisit the critical penetration of Pearl vortices in narrow superconducting flat rings cooled in magnetic fields. Scanning superconducting quantum interference device microscopy measurements showed how magnetic field penetrates and vortices are t
Externí odkaz:
http://arxiv.org/abs/1905.10753
Autor:
Tomiyasu, K., Lee, S., Ishibashi, H., Takahashi, Y., Kawamata, T., Koike, Y., Nojima, T., Torii, S., Kamiyama, T.
We determined the magnetic structure of CuCr$_2$O$_4$ using neutron diffraction and irreducible representation analysis. The measurements identified a new phase between 155 K and 125 K as nearly collinear magnetic ordering in the Cr pyrochlore lattic
Externí odkaz:
http://arxiv.org/abs/1803.06447
Autor:
Tomiyasu, K., Ito, N., Okazaki, R., Takahashi, Y., Onodera, M., Iwasa, K., Nojima, T., Aoyama, T., Ohgushi, K., Ishikawa, Y., Kamiyama, T., Ohira-Kawamura, S., Kofu, M, Ishihara, S.
Spin-state transition, also known as spin crossover, plays a key role in diverse systems, including minerals and biological materials. In theory, the boundary range between the low- and high-spin states is expected to enrich the transition and give r
Externí odkaz:
http://arxiv.org/abs/1712.09169
Direct observation of vortex states confined in mesoscopic regular triangle dots of amorphous MoGe thin films was made with a scanning superconducting quantum interference device microscope. The observed magnetic images illustrate clearly how vortice
Externí odkaz:
http://arxiv.org/abs/1603.03147
Among the recently discovered iron-based superconductors, ultrathin films of FeSe grown on SrTiO3 substrates have uniquely evolved into a high superconducting-transition-temperature (TC) material. The mechanisms for the high-TC superconductivity are
Externí odkaz:
http://arxiv.org/abs/1510.00175
Publikováno v:
Phys. Rev. B vol 77, 174515 (2008)
New THz data on the optical conductivity of Pb are presented as well as a detailed Eliashberg analysis with particular emphasis on phonon-assisted processes not included in a BCS approach. Consideration of the optical self-energy instead of the condu
Externí odkaz:
http://arxiv.org/abs/0803.0974