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pro vyhledávání: '"Aoki, D."'
A structural orthorhombic-to-tetragonal phase transition was recently discovered in the heavy-fermion compound UTe$_2$ at a pressure $p^*\simeq3-8$~GPa [Honda \textit{et al.}, J. Phys. Soc. Jpn. \textbf{92}, 044702 (2023); Huston \textit{et al.}, Phy
Externí odkaz:
http://arxiv.org/abs/2403.20277
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:
Knafo, W., Thebault, T., Manuel, P., Khalyavin, D. D., Orlandi, F., Ressouche, E., Beauvois, K., Lapertot, G., Kaneko, K., Aoki, D., Braithwaite, D., Knebel, G., Raymond, S.
The discovery of multiple superconducting phases in UTe2 boosted research on correlated-electron physics. This heavy-fermion paramagnet was rapidly identified as a reference compound to study the interplay between magnetism and unconventional superco
Externí odkaz:
http://arxiv.org/abs/2311.05455
Autor:
Knebel, G., Pourret, A., Rousseau, S., Marquardt, N., Braithwaite, D., Honda, F., Aoki, D., Lapertot, G., Knafo, W., Seyfarth, G., Brison, J-P., Flouquet, J.
The electrical resistivity of the unconventional superconductor UTe$_2$ shows very anisotropic behavior in the normal state depending on the current direction. In the present paper we show that the maximum in the resistivity $\rho_c$ for current appl
Externí odkaz:
http://arxiv.org/abs/2306.16273
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
Autor:
Kinjo, K., Fujibayashi, H., Kitagawa, S., Ishida, K., Tokunaga, Y., Sakai, H., Kambe, S., Nakamura, A., Shimizu, Y., Homma, Y., Li, D. X., Honda, F., Aoki, D., Hiraki, K., Kimata, M., Sasaki, T.
Publikováno v:
Physical Review B 107 L060502 (2023)
UTe2 is a recently discovered spin-triplet superconductor. One of the characteristic features of UTe2 is a magnetic field (H)-boosted superconductivity above 16 T when H is applied exactly parallel to the b axis. To date, this superconducting (SC) st
Externí odkaz:
http://arxiv.org/abs/2206.02444
Autor:
Thebault, T., Knafo, W., Vališka, M., Lapertot, G., Pourret, A., Aoki, D., Knebel, G., Braithwaite, D.
Publikováno v:
Phys. Rev. B 106, 144406 (2022)
Multiple unconventional superconducting phases are suspected to be driven by magnetic fluctuations in the heavy-fermion paramagnet UTe$_2$, and a challenge is to identify the signatures of the electronic correlations, including the magnetic fluctuati
Externí odkaz:
http://arxiv.org/abs/2205.15789
Autor:
Ota, K., Shimozawa, M., Muroya, T., Miyamoto, T., Hosoi, S., Nakamura, A., Homma, Y., Honda, F., Aoki, D., Izawa, K.
We have performed precise Hall measurements for the ferrotoroidic candidate material UNi4B. Below Neel temperature TN ~ 20 K (corresponding to the ferrotoroidic transition temperature), a Hall voltage becomes finite even at zero field and changes pro
Externí odkaz:
http://arxiv.org/abs/2205.05555
Publikováno v:
J. Phys.: Condens. Matter 34, 243002 (2022)
The novel spin-triplet superconductor candidate UTe2 was discovered only recently at the end of 2018 and attracted enormous attention. We review key experimental and theoretical progress which has been achieved in different laboratories. UTe2 is a he
Externí odkaz:
http://arxiv.org/abs/2110.10451