Zobrazeno 1 - 10
of 945
pro vyhledávání: '"Tokiwa, Y"'
Autor:
Tokiwa, Y., Opletal, . P., Sakai, H., Kambe, S., Yamamoto, E., Kimata, M., Awaji, S., Sasaki, T., Aoki, D., Haga, Y., Tokunaga, Y.
Publikováno v:
Phys. Rev. B 109, L140502 (2024)
The normal-conducting state of the superconductor UTe$_2$ is studied by entropy analysis for magnetic fields along the $b$-axis, obtained from magnetization using the relation $(\partial M/\partial T)_B=(\partial S/\partial B)_T$. We observe a strong
Externí odkaz:
http://arxiv.org/abs/2402.16258
Autor:
Suetsugu, S., Shimomura, M., Kamimura, M., Asaba, T., Asaeda, H., Kosuge, Y., Sekino, Y., Ikemori, S., Kasahara, Y., Kohsaka, Y., Lee, M., Yanase, Y., Sakai, H., Opletal, P., Tokiwa, Y., Haga, Y., Matsuda, Y.
Spin-triplet superconductors provide an ideal platform for realizing topological superconductivity with emergent Majorana quasiparticles. The promising candidate is the recently discovered superconductor UTe$ _2$, but the symmetry of the superconduct
Externí odkaz:
http://arxiv.org/abs/2306.17549
Autor:
Tokiwa, Y., Kambe, H. Sakai. S., Opletal, P., Yamamoto, E., Kimata, M., Awaji, S., Sasaki, T., Yanase, Y., Haga, Y., Tokunaga, Y.
Publikováno v:
Phys. Rev. B 108, 144502 (2023)
The vortex dynamics in the spin-triplet superconductor, UTe$_2$, are studied by measuring the DC electrical resistivity with currents along the $a$-axis under magnetic fields along the $b$-axis. Surprisingly, we have discovered an island region of lo
Externí odkaz:
http://arxiv.org/abs/2305.17840
Autor:
Ishihara, K., Kobayashi, M., Imamura, K., Konczykowski, M., Sakai, H., Opletal, P., Tokiwa, Y., Haga, Y., Hashimoto, K., Shibauchi, T.
Publikováno v:
Phys. Rev. Research 5, L022002 (2023)
The paramagnetic spin-triplet superconductor UTe$_2$ has attracted significant attention because of its exotic superconducting properties including an extremely high upper critical field and possible chiral superconducting states. Recently, ultraclea
Externí odkaz:
http://arxiv.org/abs/2301.04801
Autor:
Jesche, A., Winterhalter-Stocker, N., Hirschberger, F., Bellon, A., Bachus, S., Tokiwa, Y., Tsirlin, A. A., Gegenwart, P.
Publikováno v:
Phys. Rev. B 107, 104402 (2023)
Crystal structure, thermodynamic properties, and adiabatic demagnetization refrigeration (ADR) effect in the spin-7/2 triangular antiferromagnet KBaGd(BO3)2 are reported. With the average nearest-neighbor exchange coupling of 44 mK, this compound sho
Externí odkaz:
http://arxiv.org/abs/2212.12483
Autor:
Tokiwa, Y., Opletal, P., Sakai, H., Kubo, K., Yamamoto, E., Kambe, S., Kimata, M., Awaji, S., Sasaki, T., Aoki, D., Tokunaga, Y., Haga, Y.
Influence of metamagnetism on superconductivity is studied for the field along an easy $a$-axis by AC magnetic susceptibility, magnetization, and magnetocaloric effect (MCE) in UTe$_2$. The improvement of crystal quality leads to an upward curvature
Externí odkaz:
http://arxiv.org/abs/2210.11769
Autor:
Sakai, H., Tokiwa, Y., Opletal, P., Kimata, M., Awaji, S., Sasaki, T., Aoki, D., Kambe, S., Tokunaga, Y., Haga, Y.
Publikováno v:
Phys. Rev. Lett. 130, 196002 (2023)
The superconducting (SC) phase diagram in uranium ditelluride is explored under magnetic fields ($H$) along the hard magnetic b-axis using a high-quality single crystal with $T_{\rm c} = 2.1$ K. Simultaneous electrical resistivity and AC magnetic sus
Externí odkaz:
http://arxiv.org/abs/2210.05909
Publikováno v:
J. Phys.: Condens. Matter 34 175601 (2022)
Single crystals of the unconventional superconductor UTe$_2$ have been grown in various conditions which result in different superconducting transition temperature as well as normal state properties. Stoichiometry of the samples has been characterize
Externí odkaz:
http://arxiv.org/abs/2112.13468
Publikováno v:
Commun Mater 2, 42 (2021)
Generation of very low temperatures has been crucially important for applications and fundamental research, as low-temperature quantum coherence enables operation of quantum computers and formation of exotic quantum states, such as superfluidity and
Externí odkaz:
http://arxiv.org/abs/2103.00765
Autor:
Schubert, M. -H., Tokiwa, Y., Hübner, S. -H., Mchalwat, M., Blumenröther, E., Jeevan, H. S., Gegenwart, P.
Previously, we reported that the doping and pressure dependence of the $T^\ast(B)$ crossover in YbRh$_2$Si$_2$ is incompatible with its interpretation as signature of a Kondo breakdown [M.-H. Schubert et al., Phys. Rev. Research 1, 032004(R) (2019)].
Externí odkaz:
http://arxiv.org/abs/2006.07049