Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Łażewski, Jan"'
Autor:
Basak, Surajit, Kobiałka, Aksel, Sternik, Małgorzata, Łażewski, Jan, Jochym, Paweł T., Oleś, Andrzej M., Piekarz, Przemysław, Ptok, Andrzej
Publikováno v:
Computational Materials Science 244, 113149 (2024)
We present the pressure dependence of the electronic and dynamical properties of six different CoGe phases: orthorhombic Cmmm, hexagonal P6/mmm and P$\bar{6}$2m, monoclinic C2/m, cubic P2$_{1}$3, and orthorhombic Pnma. Using first-principles DFT calc
Externí odkaz:
http://arxiv.org/abs/2403.07580
Autor:
Ptok, Andrzej, Basak, Surajit, Kobiałka, Aksel, Sternik, Małgorzata, Łażewski, Jan, Jochym, Paweł T., Oleś, Andrzej M., Piekarz, Przemysław
Publikováno v:
Phys. Rev. Materials 8, L080601 (2024)
Electron-correlation-driven phonon soft modes have been recently reported in the antiferromagnetic kagome FeGe compound and associated with the observed charge density wave (CDW). In this paper, we present a systematic investigation of the CDW origin
Externí odkaz:
http://arxiv.org/abs/2403.00297
Autor:
Pastukh, Svitlana, Jochym, Paweł T., Pastukh, Oleksandr, Łażewski, Jan, Legut, Dominik, Piekarz, Przemysław
Publikováno v:
Physical Review B 108.10 (2023): 104104
Ab initio investigations of structural, electronic, and dynamical properties of the high-temperature $\beta$ phase of copper pyrophosphate were performed using density functional theory. The electronic band structure shows the Mott insulating state d
Externí odkaz:
http://arxiv.org/abs/2310.16553
Autor:
Ptok, Andrzej, Meier, William R., Kobiałka, Aksel, Basak, Surajit, Sternik, Małgorzata, Łażewski, Jan, Jochym, Paweł T., McGuire, Michael A., Sales, Brian C., Miao, Hu, Piekarz, Przemysław, Oleś, Andrzej M.
Publikováno v:
Phys. Rev. Research 5, 043231 (2023)
RhPb was initially recognized as one of a CoSn-like compounds with $P6/mmm$ symmetry, containing an ideal kagome lattice of $d$-block atoms. However, theoretical calculations predict the realization of the phonon soft mode which leads to the kagome l
Externí odkaz:
http://arxiv.org/abs/2309.02419
Autor:
Ptok, Andrzej, Kobiałka, Aksel, Sternik, Małgorzata, Łażewski, Jan, Jochym, Paweł T., Oleś, Andrzej M., Piekarz, Przemysław
Publikováno v:
Phys. Rev. B 105, 235134 (2022)
Systems containing the ideal kagome lattice can exhibit several distinct and novel exotic states of matter. One example of such systems is a recently discovered $A$V$_{3}$Sb$_{5}$ ($A$ = K, Rb, and Cs) family of compounds. Here, the coexistence of th
Externí odkaz:
http://arxiv.org/abs/2110.09816
Autor:
Ptok, Andrzej, Kobiałka, Aksel, Sternik, Małgorzata, Łażewski, Jan, Jochym, Paweł T., Oleś, Andrzej M., Stankov, Svetoslav, Piekarz, Przemysław
Publikováno v:
Phys. Rev. B 104, 054305 (2021)
Hexagonal and kagome lattices exhibit extraordinary electronic properties. It is a natural consequence of additional discrete degree of freedom associated with a valley or the occurence of electronic flat-bands. Combination of both types of lattices,
Externí odkaz:
http://arxiv.org/abs/2106.03740
Autor:
Ptok, Andrzej, Kapcia, Konrad J., Jochym, Paweł T., Łażewski, Jan, Oleś, Andrzej M., Piekarz, Przemysław
Publikováno v:
Phys. Rev. B 104, 041109 (2021)
Recently discovered heavy fermion CeRh$_{2}$As$_{2}$ compound crystallizes in the nonsymmorphic $P4/nmm$ symmetry, which enables the occurrence of topological protection. Experimental results show that this material exhibits unusual behavior, which i
Externí odkaz:
http://arxiv.org/abs/2102.02735
Autor:
Piekarz, Przemysław, Łażewski, Jan, Jochym, Paweł T., Sternik, Małgorzata, Parlinski, Krzysztof
Publikováno v:
Phys. Rev. B 95, 134303 (2017)
The structural and dynamical properties of FePt nanoparticles were studied within the density functional theory. The effect of size and chemical composition on dynamical stability of nanoparticles was investigated for the cuboctahedral and icosahedra
Externí odkaz:
http://arxiv.org/abs/1704.04056
Autor:
Jochym, Paweł T., Łażewski, Jan
The symmetry properties of the dynamical matrix are well described in multiple classic textbooks. This short paper revisits the issue to demonstrate alternative form of dynamical matrix which explicitly shows its symmetry and reality in common cases.
Externí odkaz:
http://arxiv.org/abs/1612.09148
Autor:
Strak, Pawel, Ahmad, Ashfaq, Kempisty, Pawel, Piechota, Jacek, Sakowski, Konrad, Nowak, Grzegorz, Kangawa, Yoshihiro, Łażewski, Jan, Krukowski, Stanislaw
Publikováno v:
In Computational Materials Science 15 February 2022 203
