@article{MTMT:30709889,
	title = {Magnetic structure of monatomic Fe chains on Re(0001): Emergence of chiral multispin interactions},
	url = {https://m2.mtmt.hu/api/publication/30709889},
	author = {Lászlóffy, András and Rózsa, Levente and Palotás, Krisztián and Udvardi, László and Szunyogh, László},
	doi = {10.1103/PhysRevB.99.184430},
	journal-iso = {PHYS REV B},
	journal = {PHYSICAL REVIEW B},
	volume = {99},
	unique-id = {30709889},
	issn = {2469-9950},
	year = {2019},
	eissn = {2469-9969},
	orcid-numbers = {Rózsa, Levente/0000-0001-9456-5755; Palotás, Krisztián/0000-0002-1914-2901}
}

@article{MTMT:2695314,
	title = {Interatomic Exchange Interactions for Finite-Temperature Magnetism and Nonequilibrium Spin Dynamics},
	url = {https://m2.mtmt.hu/api/publication/2695314},
	author = {Szilva, Attila and Costa, M and Bergman, A and Szunyogh, László and Nordstrom, L and Eriksson, O},
	doi = {10.1103/PhysRevLett.111.127204},
	journal-iso = {PHYS REV LETT},
	journal = {PHYSICAL REVIEW LETTERS},
	volume = {111},
	unique-id = {2695314},
	issn = {0031-9007},
	abstract = {We derive ab inito exchange parameters for general noncollinear magnetic configurations, in terms of a multiple scattering formalism. We show that the general exchange formula has an anisotropiclike term even in the absence of spin-orbit coupling, and that this term is large, for instance, for collinear configuration in bcc Fe, whereas for fcc Ni it is quite small. We demonstrate that keeping this term leads to what one should consider a biquadratic effective spin Hamiltonian even in the case of collinear arrangement. In noncollinear systems this term results in new tensor elements that are important for exchange interactions at finite temperatures, but they have less importance at low temperature. To illustrate our results in practice, we calculate for bcc Fe magnon spectra obtained from configuration-dependent exchange parameters, where the configurations are determined by finite-temperature effects. Our theory results in the same quantitative results as the finite-temperature neutron scattering experiments.},
	keywords = {doktori iskola: Fizikai Tudományok},
	year = {2013},
	eissn = {1079-7114}
}

@article{MTMT:117092,
	title = {Chiral Asymmetry of the Spin-Wave Spectra in Ultrathin Magnetic Films},
	url = {https://m2.mtmt.hu/api/publication/117092},
	author = {Udvardi, László and Szunyogh, László},
	doi = {10.1103/PhysRevLett.102.207204},
	journal-iso = {PHYS REV LETT},
	journal = {PHYSICAL REVIEW LETTERS},
	volume = {102},
	unique-id = {117092},
	issn = {0031-9007},
	year = {2009},
	eissn = {1079-7114}
}

@article{MTMT:117126,
	title = {First-principles calculations of spin interactions and the magnetic ground states of Cr trimers on Au(111)},
	url = {https://m2.mtmt.hu/api/publication/117126},
	author = {Antal, A and Lazarovits, Bence and Udvardi, László and Szunyogh, László and Ujfalussy, Balázs and Weinberger, P},
	doi = {10.1103/PhysRevB.77.174429},
	journal-iso = {PHYS REV B},
	journal = {PHYSICAL REVIEW B},
	volume = {77},
	unique-id = {117126},
	issn = {2469-9950},
	year = {2008},
	eissn = {2469-9969}
}

@article{MTMT:2633165,
	title = {First-principles relativistic study of spin waves in thin magnetic films},
	url = {https://m2.mtmt.hu/api/publication/2633165},
	author = {Udvardi, László and Szunyogh, László and Palotás, Krisztián and Weinberger, P},
	doi = {10.1103/PhysRevB.68.104436},
	journal-iso = {PHYS REV B},
	journal = {PHYSICAL REVIEW B},
	volume = {68},
	unique-id = {2633165},
	issn = {2469-9950},
	abstract = {In order to study spin-wave excitations of itinerant ferromagnets a relativistic first-principles method based on the adiabatic approach is presented. The derivatives of the free energy up to second order with respect of the polar and azimuthal angles are derived within the framework of the magnetic force theorem and the fully relativistic Korringa-Kohn-Rostoker method. Exchange and spin-orbit coupling are thus incorporated on equal footing in the Hamiltonian. Furthermore, a
		detailed comparison to classical spin Hamiltonians is given and it is shown that the magnetocrystalline anisotropy energy contains contributions from both the on-site anisotropy and the off-site exchange coupling terms. The method is applied to an Fe monolayer on Cu(001) and Au(001) surfaces and for a Co monolayer on Cu(001). The calculations provide with the gap at zero wave number due to the spin-orbit coupling and uniaxial anisotropy energies in good agreement with the results of the band energy difference method. It is pointed out that the terms in the spin-wave Hamiltonian related to the mixed partial derivatives of the free energy, absent within a nonrelativistic
		description, introduce an asymmetry in the magnon spectrum with respect to two in-plane easy axes. Moreover, in the case of an in-plane magnetized system the long-wavelength magnons are elliptically polarized due to the difference of the second-order uniaxial and fourth-order in-plane magnetic anisotropy.},
	year = {2003},
	eissn = {2469-9969},
	orcid-numbers = {Palotás, Krisztián/0000-0002-1914-2901}
}