no code implementations • 10 Dec 2020 • Yuji Nakagawa, Yuichi Kasahara, Takuya Nomoto, Ryotaro Arita, Tsutomu Nojima, Yoshihiro Iwasa
The Bardeen-Cooper-Schrieffer (BCS) condensation and the Bose-Einstein condensation (BEC) are the two extreme limits of the ground state of the paired fermion systems.
Superconductivity
1 code implementation • 8 Dec 2020 • Niklas Witt, Erik G. C. P. van Loon, Takuya Nomoto, Ryotaro Arita, Tim Wehling
Superconductivity arises mostly at energy and temperature scales that are much smaller than the typical bare electronic energies.
Strongly Correlated Electrons Superconductivity
no code implementations • 3 Nov 2020 • Tonghua Yu, Motoaki Hirayama, José A. Flores-Livas, Takuya Nomoto, Ryotaro Arita
We propose a design scheme for seeking potential electrides derived from conventional materials.
Materials Science Strongly Correlated Electrons
no code implementations • 28 Aug 2020 • Susumu Minami, Fumiyuki Ishii, Motoaki Hirayama, Takuya Nomoto, Takashi Koretsune, Ryotaro Arita
Motivated by the recent discovery of a large anomalous Nernst effect in Co$_2$MnGa, Fe$_3X$ ($X$=Al, Ga) and Co$_3$Sn$_2$S$_2$, we performed a first-principles study to clarify the origin of the enhancement of the transverse thermoelectric conductivity ($\alpha_{ij}$) in these ferromagnets.
Materials Science Mesoscale and Nanoscale Physics
no code implementations • 27 Jul 2019 • Ion Errea, Francesco Belli, Lorenzo Monacelli, Antonio Sanna, Takashi Koretsune, Terumasa Tadano, Raffaello Bianco, Matteo Calandra, Ryotaro Arita, Francesco Mauri, José A. Flores-Livas
The relevance of quantum fluctuations in the energy landscape found here questions many of the crystal structure predictions made for hydrides within a classical approach that at the moment guide the experimental quest for room-temperature superconductivity [4, 5, 6].
Superconductivity Materials Science
1 code implementation • 23 Jul 2019 • Giovanni Pizzi, Valerio Vitale, Ryotaro Arita, Stefan Blügel, Frank Freimuth, Guillaume Géranton, Marco Gibertini, Dominik Gresch, Charles Johnson, Takashi Koretsune, Julen Ibañez-Azpiroz, Hyungjun Lee, Jae-Mo Lihm, Daniel Marchand, Antimo Marrazzo, Yuriy Mokrousov, Jamal I. Mustafa, Yoshiro Nohara, Yusuke Nomura, Lorenzo Paulatto, Samuel Poncé, Thomas Ponweiser, Junfeng Qiao, Florian Thöle, Stepan S. Tsirkin, Małgorzata Wierzbowska, Nicola Marzari, David Vanderbilt, Ivo Souza, Arash A. Mostofi, Jonathan R. Yates
Wannier90 is an open-source computer program for calculating maximally-localised Wannier functions (MLWFs) from a set of Bloch states.
Materials Science Computational Physics
1 code implementation • 29 Oct 2016 • Takashi Koretsune, Ryotaro Arita
We show an efficient way to compute the electron-phonon coupling constant, $\lambda$, and the superconducting transition temperature, Tc from first-principles calculations.
Superconductivity
