Zobrazeno 1 - 10
of 136
pro vyhledávání: '"DEE, P. M."'
WBe2, which occurs in space group 194, with hexagonal symmetry P63/mmc, is prepared by arc-melting at temperatures above 2200 C, where Be vapor loss is significant. This study is motivated by recent work on MoB2 and WB2, both superconductors (Tc=32 a
Externí odkaz:
http://arxiv.org/abs/2411.17504
Autor:
Sinha, S., Lim, J., Li, Z., Kim, J. S., Hire, A. C., Dee, P. M., Kumar, R. S., Popov, D., Hemley, R. J., Hennig, R. G., Hirschfeld, P. J., Stewart, G. R., Hamlin, J. J.
The recent surprising discovery of superconductivity with critical temperature $T_c$ = 32 K in MoB$_2$ above 70 GPa has led to the search for related materials that may superconduct at similarly high $T_c$ values and lower pressures. We have studied
Externí odkaz:
http://arxiv.org/abs/2408.17416
Autor:
Gibson, Jason B., Hire, Ajinkya C., Dee, Philip M., Barrera, Oscar, Geisler, Benjamin, Hirschfeld, Peter J., Hennig, Richard G.
Integrating deep learning with the search for new electron-phonon superconductors represents a burgeoning field of research, where the primary challenge lies in the computational intensity of calculating the electron-phonon spectral function, $\alpha
Externí odkaz:
http://arxiv.org/abs/2401.16611
Autor:
Dee, P. M., Kim, J. S., Hire, A. C., Lim, J., Fanfarillo, L., Sinha, S., Hamlin, J. J., Hennig, R. G., Hirschfeld, P. J., Stewart, G. R.
Publikováno v:
Phys. Rev. B 109, 104520, March 22, 2024
Recent investigations into MoB$_{2}$ have unveiled a direct connection between a pressure-induced structural transition to a P6/mmm space group structure and the emergence of superconductivity, producing critical temperatures up to 32 K at 100 GPa. T
Externí odkaz:
http://arxiv.org/abs/2310.03818
Autor:
Lim, J., Sinha, S., Hire, A. C., Kim, J. S., Dee, P. M., Kumar, R. S., Popov, D., Hemley, R. J., Hennig, R. G., Hirschfeld, P. J., Stewart, G. R., Hamlin, J. J.
Publikováno v:
Phys. Rev. B 108, 094501 (2023)
A recent work has demonstrated that MoB$_2$, transforming to the same structure as MgB$_2$ ($P6/mmm$), superconducts at temperatures above 30 K near 100 GPa [C. Pei $et$ $al$. Natl. Sci. Rev., nwad034 (2023)], and Nb-substitution in MoB$_2$ stabilize
Externí odkaz:
http://arxiv.org/abs/2302.13936
Publikováno v:
Phys. Rev. B 107, 104503 (2023)
In a recent work by Schrodi $\textit{et al}$. [Phys. Rev. B. $\textbf{104}$, L140506 (2021)], the authors find an unconventional superconducting state with a sign-changing order parameter using the Migdal-Eliashberg theory, including the first vertex
Externí odkaz:
http://arxiv.org/abs/2301.00480
Autor:
Hire, A. C., Sinha, S., Lim, J., Kim, J. S., Dee, P. M., Fanfarillo, L., Hamlin, J. J., Hennig, R. G., Hirschfeld, P. J., Stewart, G. R.
Publikováno v:
Phys. Rev. B 106, 174515, 2022
Recently it was discovered that, under elevated pressures, MoB$_2$ exhibits superconductivity at a critical temperature, $T_c$, as high as 32 K. The superconductivity appears to develop following a pressure-induced structural transition from the ambi
Externí odkaz:
http://arxiv.org/abs/2212.14869
Publikováno v:
Phys. Rev. B 105, 214502 (2022)
It has been proposed that the superconducting transition temperature $T_{\mathrm{c}}$ of an unconventional superconductor with a large pairing scale but strong phase fluctuations can be enhanced by coupling it to a metal. However, the general efficac
Externí odkaz:
http://arxiv.org/abs/2203.05669
Autor:
Nosarzewski, B., Huang, E. W., Dee, Philip M., Esterlis, I., Moritz, B., Kivelson, S. A., Johnston, S., Devereaux, T. P.
Publikováno v:
Phys. Rev. B 103, 235156 (2021)
The electron-phonon (e-ph) interaction remains of great interest in condensed matter physics and plays a vital role in realizing superconductors, charge-density-waves (CDW), and polarons. We study the two-dimensional Holstein model for e-ph coupling
Externí odkaz:
http://arxiv.org/abs/2103.09242
Publikováno v:
Commun Phys 3, 145 (2020)
Determining the range of validity of Migdal's approximation for electron-phonon ($e$-ph) coupled systems is a long-standing problem. Many attempts to answer this question employ the Holstein Hamiltonian, where the electron density couples linearly to
Externí odkaz:
http://arxiv.org/abs/2008.00020