Preprints

 

B. Tóth, K. Amelin, T. Rõõm, U. Nagel, V. Tsurkan, L. Prodan, I. Kézsmárki, S. Bordács

Spin excitations in the magnetically ordered phases of MnSc₂S₄

arXiv:2206.14455

 

L. Peedu, V. Kocsis, D. Szaller, B. Forrai, S. Bordács, I. Kézsmárki, J. Viirok, U. Nagel, B. Bernáth, D. L. Kamenskyi, A. Miyata, O. Portugall, Y. Tokunaga, Y. Tokura, Y. Taguchi, T. Rõõm

Refining magnetic interactions from the magnetic field dependence of spin-wave excitations in magnetoelectric LiFePO₄

arXiv:2204.12967

 

F. L. Schilberth, N. Unglert, L. Prodan, F. Meggle, J. Ebad Allah, C. A. Kuntscher, A. Tsirlin, V. Tsurkan, J. Deisenhofer, L. Chioncel, I. Kézsmárki and S. Bordács

Magneto-optical detection of topological contributions to the anomalous Hall effect in a kagome ferromagnet

arXiv:2106.15156

 

2022

 

[58] Á. Butykai, K. Geirhos, D. Szaller, L. F. Kiss, L. Balogh, M. Azhar, M. Garst, L. DeBeer-Schmitt, T. Waki, Y. Tabata, H. Nakamura, I. Kézsmárki and S. Bordács

Squeezing the periodicity of Néel-type magnetic modulations by enhanced Dzyaloshinskii-Moriya interaction of 4d electrons

NPJ QUANTUM MATERIALS 7, 26 (2022)

 

[57] S. Reschke, D. G. Farkas, A. Strinić, S. Ghara, K. Guratinder, O. Zaharko, L. Prodan, V. Tsurkan, D. Szaller, S. Bordács, J. Deisenhofer and I. Kézsmárki 

Confirming the trilinear form of the optical magnetoelectric effect in the polar honeycomb antiferromagnet Co₂Mo₃O₈

NPJ QUANTUM MATERIALS 7, 1 (2022)

 

2021

 

[56] D. G. Farkas, D. Szaller, I. Kézsmárki, U. Nagel, T. Rõõm, L. Peedu, J. Viirok, J. S. White, R. Cubitt, T. Ito, R. S. Fishman, and S. Bordács

Selection rules and dynamic magnetoelectric effect of the spin waves in multiferroic BiFeO₃

PHYSICAL REVIEW B 104, 174429 (2021)

 

[55] J. Vít, J. Viirok, L. Peedu, T. Rõõm, U. Nagel, V. Kocsis, Y. Tokunaga, Y. Taguchi, Y. Tokura, I. Kézsmárki, P. Balla, K. Penc, J. Romhányi, and S. Bordács

In Situ Electric-Field Control of THz Nonreciprocal Directional Dichroism in the Multiferroic Ba₂CoGe₂O₇

PHYSICAL REVIEW LETTERS 127, 157201 (2021)

 

2020

 

[54] D. Szaller, K. Szász, S. Bordács, J. Viirok, T. Rõõm, U. Nagel, A. Shuvaev, L. Weymann, A. Pimenov, A.A. Tsirlin, A. Jesche, L. Prodan, V. Tsurkan, and I. Kézsmárki

Magnetic anisotropy and exchange paths for octahedrally and tetrahedrally coordinated Mn2+ ions in the honeycomb multiferroic Mn₂Mo₃O₈

PHYSICAL REVIEW B 102, 144410 (2020)

 

[53] T. Rõõm, J. Viirok, L. Peedu, U. Nagel, D.G. Farkas, D. Szaller, V. Kocsis, S. Bordács, I. Kézsmárki, D.L. Kamenskyi, H. Engelkamp, M. Ozerov, D. Smirnov, J. Krzystek, K. Thirunavukkuarasu, Y. Ozaki, Y. Tomioka, T. Ito, T. Datta, and R. S. Fishman

Magnetoelastic distortion of multiferroic BiFeO₃ in the canted antiferromagnetic state

PHYSICAL REVIEW B 102, 214410 (2020)

 

[52] B. Gross, S. Philipp, K. Geirhos, A. Mehlin, S. Bordács, V. Tsurkan, A. Leonov, I. Kézsmárki, and M. Poggio

Stability of Néel-type skyrmion lattice against oblique magnetic fields in GaV₄S₈ and GaV₄Se₈

PHYSICAL REVIEW B 102, 104407 (2020)

 

[51] K. Geirhos, B. Gross, B. G. Szigeti, A. Mehlin, S. Philipp, J. S. White, R. Cubitt, S. Widmann, S. Ghara, P. Lunkenheimer, V. Tsurkan, E. Neuber, D. Ivaneyko, P. Milde, L. M. Eng, A. O. Leonov, S. Bordács, M. Poggio, and I. Kézsmárki

Macroscopic manifestation of domain-wall magnetism and magnetoelectric effect in a Néel-type skyrmion host

npj QUANTUM MATERIALS 5, 1 (2020)

 

2019

 

[50] V. Kocsis, S. Bordács, Y. Tokunaga, J. Viirok, L. Peedu, T. Rõõm, U. Nagel, Y. Taguchi, Y. Tokura, and I. Kézsmárki

Magnetoelectric spectroscopy of spin excitations in LiCoPO₄

PHYSICAL REVIEW B 100, 155124 (2019), ‘Editors’ suggestion’

 

[49] S. Bordács, M. Orlita, M. Šikula, H. Murakawa, and Y. Tokura

Limits of validity of the Rashba model in BiTeI: High-field magneto-optical study

PHYSICAL REVIEW B 100, 155203 (2019)

 

[48] L. Peedu, V. Kocsis, D. Szaller, J. Viirok, U. Nagel, T. Rõõm, D. G. Farkas, S. Bordács, D. L. Kamenskyi, U. Zeitler, Y. Tokunaga, Y. Taguchi, Y. Tokura, and I. Kézsmárki

Spin excitations of magnetoelectric LiNiPO₄ in multiple magnetic phases

PHYSICAL REVIEW B 100, 024406 (2019), ‘Editors’ suggestion’

 

[47] P. Padmanabhan, F. Sekiguchi, R. B. Versteeg, E. Slivina, V. Tsurkan, S. Bordács, I. Kézsmárki, and P. H. M. van Loosdrecht

Optically Driven Collective Spin Excitations and Magnetization Dynamics in the Néel-type Skyrmion Host GaV₄S₈

PHYSICAL REVIEW LETTERS 122, 107203 (2019)

 

[46] Y. Okamura, S. Seki, S. Bordács, Á. Butykai, V. Tsurkan, I. Kézsmárki, and Y. Tokura

Microwave Directional Dichroism Resonant with Spin Excitations in the Polar Ferromagnet GaV4S8

PHYSICAL REVIEW LETTERS 122, 057202 (2019)

 

[45] J. Viirok, U. Nagel, T. Rõõm, D.G. Farkas, P. Balla, D. Szaller, V. Kocsis,Y. Tokunaga, Y. Taguchi, Y. Tokura, B. Bernáth, D.L. Kamenskyi, I. Kézsmárki, S. Bordács, and K. Penc

Directional dichroism in the paramagnetic state of multiferroics: A case study of infrared light absorption in Sr2CoSi2O7 at high temperatures

PHYSICAL REVIEW B 99, 014410 (2019)

 

2018

 

[44] S. Bordács, D.G. Farkas, J.S. White, R. Cubitt, L. DeBeer-Schmitt, T. Ito, and I. Kézsmárki

Magnetic Field Control of Cycloidal Domains and Electric Polarization in Multiferroic BiFeO3

PHYSICAL REVIEW LETTERS 120, 147203 (2018)

 

[43] B. Fülöp, Z. Tajkov, J. Pető, P. Kun, J. Koltai, L. Oroszlány, E. Tóvári, H. Murakawa, Y. Tokura, S. Bordács, L. Tapasztó, and S. Csonka

Exfoliation of single layer BiTeI flakes

2D MATERIALS 5, 031013 (2018)

 

[42] V. Kocsis, K. Penc, T. Rõõm, U. Nagel, J. Vit, J. Romhányi, Y. Tokunaga, Y. Taguchi, Y. Tokura, I. Kézsmárki, and S. Bordács

Identification of Antiferromagnetic Domains Via the Optical Magnetoelectric Effect

PHYSICAL REVIEW LETTERS 121, 057601 (2018)

 

[41] V. Kocsis, S. Bordács, J. Deisenhofer, L.F. Kiss, K. Ohgushi, Y. Kaneko, Y. Tokura, and I. Kezsmarki

Strong magneto-optical effects in ACr2O4 (A = Fe, Co) spinel oxides generated by tetrahedrally coordinated transition metal ions

PHYSICAL REVIEW B 97, 125140 (2018)

 

[40] Y. Li, A. Lukács, S. Bordács, J. Moczar, M. Nyitrai, and J. Hebling

The effect of the flexibility of hydrogen bonding network on low-frequency motions of amino acids. Evidence from Terahertz spectroscopy and DFT calculations.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 191, 8-15 (2018)

 

[39] E. Neuber, P. Milde, Á. Butykai, S. Bordács, H. Nakamura, T. Waki, Y. Tabata, K. Geirhos, P. Lunkenheimer, I. Kézsmárki, P. Ondrejkovic, J. Hlinka, and L.M. Eng

Architecture of nanoscale ferroelectric domains in GaMo4S8

JOURNAL OF PHYSICS-CONDENSED MATTER 30 445402 (2018)

 

[38] J.S. White, Á. Butykai, R. Cubitt, D. Honecker, C.D. Dewhurst, L.F. Kiss, V. Tsurkan, and S. Bordács

Direct evidence for cycloidal modulations in the thermal-fluctuation-stabilized spin spiral and skyrmion states of GaV4S8

PHYSICAL REVIEW B 97, 020401 (2018), ‘Editors’ suggestion’

 

2017

 

[37] Á. Butykai, S. Bordács, I. Kézsmárki, V. Tsurkan, A. Loidl, J. Döring, E. Neuber, P. Milde, S.C. Kehr, and L.M. Eng

Characteristics of ferroelectric-ferroelastic domains in Néel-type skyrmion host GaV4S8

SCIENTIFIC REPORTS 7, 44663 (2017)

 

[36] S. Bordács, Á. Butykai, B.G. Szigeti, J.S. White, R. Cubitt, A.O. Leonov, S. Widmann, D. Ehlers, H.A. von Nidda, V. Tsurkan, A. Loidl, and I. Kézsmárki

Equilibrium Skyrmion Lattice Ground State in a Polar Easy-plane Magnet

SCIENTIFIC REPORTS 7, 7584 (2017)

 

[35] Á. Butykai, S. Bordács, L.F. Kiss, B.G. Szigeti, V. Tsurkan, A. Loidl, and I. Kézsmárki

Relaxation dynamics of modulated magnetic phases in the skyrmion host GaV4 S8: An ac magnetic susceptibility study

PHYSICAL REVIEW B 96, 104430 (2017)

 

[34] D. Szaller, V. Kocsis, S. Bordács, T. Fehér, T. Rõõm, U. Nagel, H. Engelkamp, K. Ohgushi, and I. Kézsmárki

Magnetic resonances of multiferroic TbFe3(BO3)4

PHYSICAL REVIEW B 95, 024427 (2017)

 

[33] S. Reschke, F. Mayr, Zhe Wang, P. Lunkenheimer, Weiwu Li, D. Szaller, S. Bordács, I. Kézsmárki, V. Tsurkan, and A. Loidl

Optical conductivity in multiferroic GaV4S8 and GeV4S8: Phonons and electronic transitions

PHYSICAL REVIEW B 96, 144302 (2017)

 

[32] R.S. Fishman, S. Bordács, V. Kocsis, I. Kézsmárki, J. Viirok, U. Nagel, T. Rõõm, A. Puri, U. Zeitler, Y. Tokunaga, Y. Taguchi, and Y. Tokura

Competing exchange interactions in multiferroic and ferrimagnetic CaBaCo4O7

PHYSICAL REVIEW B 95, 024423 (2017)

 

[31] S. Widmann, E. Ruff, A. Günther, H.A. Krug, von Nidda, P. Lunkenheimer, V. Tsurkan, S. Bordács, I. Kézsmárki, and A. Loidl

On the multiferroic skyrmion-host GaV4S8

PHILOSOPHICAL MAGAZINE 97, 3428 (2017)

 

2016

 

[30] J. Hlinka, F. Borodavka, I. Rafalovskyi, Z. Docekalova, J. Pokorny, I. Gregora, V. Tsurkan, H. Nakamura, F. Mayr, C.A. Kuntscher, A. Loidl, S. Bordács, D. Szaller, H.-J. Lee, J. H. Lee, and I. Kézsmárki

Lattice modes and the Jahn-Teller ferroelectric transition of GaV4S8

PHYSICAL REVIEW B 94, 060104 (2016)

 

[29] V. Kocsis, Y. Tokunaga, S. Bordács, M. Kriener, A. Puri, U. Zeitler, Y. Taguchi, Y. Tokura, and I. Kézsmárki

Magnetoelectric effect and magnetic phase diagram of a polar ferrimagnet CaBaFe4O7

PHYSICAL REVIEW B 93, 014444 (2016)

 

2015

 

[28] R. Akashi, M. Ochi, S. Bordács, R. Suzuki, Y. Tokura, Y. Iwasa, and R. Arita

Two-Dimensional Valley Electrons and Excitons in Noncentrosymmetric 3R-MoS2

PHYSICAL REVIEW APPLIED 4, 014002 (2015)

 

[27] S. Bordács, V. Kocsis, Y. Tokunaga, U. Nagel, T. Rõõm, Y. Takahashi, Y. Taguchi, and Y. Tokura,

Unidirectional terahertz light absorption in the pyroelectric ferrimagnet CaBaCo4O7

PHYSICAL REVIEW B 92, 214441 (2015)

 

[26] E. Ruff, S. Widmann, P. Lunkenheimer, V. Tsurkan, S. Bordács, I. Kézsmárki, and A. Loidl

Multiferroicity and skyrmions carrying electric polarization in GaV4S8

SCIENCE ADVANCES 1, e1500916 (2015)

 

[25] I. Kézsmárki, U. Nagel, S. Bordács, R.S. Fishman, J.H. Lee, Taek Yi Hee, S.-W. Cheong, and T. Rõõm

Optical Diode Effect at Spin-Wave Excitations of the Room-Temperature Multiferroic BiFeO3

PHYSICAL REVIEW LETTERS 115, 127203 (2015)

 

[24] I. Kézsmárki, S. Bordács, P. Milde, E. Neuber, L.M. Eng, J.S. White, H.M. Rønnow, C.D. Dewhurst, M. Mochizuki, K. Yanai, H. Nakamura, D. Ehlers, V. Tsurkan, and A. Loidl

Néel-type Skyrmion Lattice with Confined Orientation in the Polar Magnetic Semiconductor GaV4S8

NATURE MATERIALS 14, 1116 (2015)

 

[23] R.S. Fishman, J.H. Lee, S. Bordács, I. Kézsmárki, U. Nagel, and T. Rõõm

Spin-induced polarizations and nonreciprocal directional dichroism of the room-temperature multiferroic BiFeO3

PHYSICAL REVIEW B 92, 094422 (2015)

 

[22] S. Bordács, and Y. Tokura

Novel optical properties of spin-wave excitations in non-centrosymmetric oxides: the case of Ba2CoGe2O7

In: Jean-Yves, Bigot; Wolfgang, Hübner; Theo, Rasing; Roy, Chantrell (eds.) Ultrafast Magnetism I : Proceedings of the International Conference UMC 2013

Cham (Switzerland) : Springer International Publishing, (2015) pp. 89-91. , 3 p.

 

2014

 

[21] D. Szaller, S. Bordács, V. Kocsis, T. Rõõm, U. Nagel, and I. Kézsmárki

Effect of spin excitations with simultaneous magnetic- and electric-dipole character on the static magnetoelectric properties of multiferroic materials

PHYSICAL REVIEW B 89, 184419 (2014)

 

[20] I. Kézsmárki, D. Szaller, S. Bordács, V. Kocsis, Y. Tokunaga, Y. Taguchi, H. Murakawa, Y. Tokura, H. Engelkamp, T. Rõõm, and U. Nagel

One-way Transparency of Four-coloured Spin-wave Excitations in Multiferroic Materials

NATURE COMMUNICATIONS 5, 3203 (2014)

 

[19] V. Hutanu, A.P. Sazonov, M. Meven, G. Roth, A. Gukasov, H. Murakawa, Y. Tokura, D. Szaller, S. Bordács, I. Kézsmárki, V.K. Guduru, L.C.J.M. Peters, U. Zeitler, J. Romhányi, and B. Náfrádi

Evolution of the 2D antiferromagnetism with temperature and magnetic field in multiferroic Ba2CoGe2O7

PHYSICAL REVIEW B 89, 064403 (2014)

 

2013

 

[18] S. Bordács, J.G. Checkelsky, H. Murakawa, H.Y. Hwang, and Y. Tokura

Landau Level Spectroscopy of Dirac Electrons in a Polar Semiconductor with Giant Rashba Spin Splitting

PHYSICAL REVIEW LETTERS 111, 166403 (2013)

 

[17] Á. Butykai, Á. Orbán, V. Kocsis, D. Szaller, S. Bordács, E. Tátrai-Szekeres, L.F. Kiss, A. Bóta, B.G. Vértessy, T. Zelles, and I. Kézsmárki

Malaria pigment crystals as magnetic micro-rotors: Key for high-sensitivity diagnosis

SCIENTIFIC REPORTS 3, 1431 (2013)

 

[16] V. Kocsis, S. Bordács, D. Varjas, K. Penc, A. Abouelsayed, C.A. Kuntscher, K. Ohgushi, Y. Tokura, and I. Kézsmárki

Magnetoelasticity in ACr2O4 spinel oxides (A= Mn, Fe, Co, Ni, and Cu)

PHYSICAL REVIEW B 87, 064416 (2013)

 

[15] D. Szaller, S. Bordács, and I. Kézsmárki

Symmetry conditions for nonreciprocal light propagation in magnetic crystals

PHYSICAL REVIEW B 87, 014421 (2013)

 

2012

 

[14] S. Bordács, I. Kézsmárki, D. Szaller, L. Demkó, N. Kida, H. Murakawa, Y. Onose, R. Shimano, T. Rõõm, U. Nagel, S. Miyahara, N. Furukawa, and Y. Tokura

Chirality of matter shows up via spin excitations

NATURE PHYSICS 8, 734 (2012)

 

[13] L. Demkó, S. Bordács, T. Vojta, D. Nozadze, F. Hrahsheh, C. Svoboda, B. Dóra, H. Yamada, M. Kawasaki, Y. Tokura, and I. Kézsmárki

Disorder Promotes Ferromagnetism: Rounding of the Quantum Phase Transition in Sr1-xCaxRuO3

PHYSICAL REVIEW LETTERS 108, 185701 (2012)

 

[12] V. Hutanu, A. Sazonov, M. Meven, H. Murakawa, Y. Tokura, S. Bordács, I. Kézsmárki, and B. Náfrádi

Determination of the magnetic order and the crystal symmetry in the multiferroic ground state of Ba2CoGe2O7

PHYSICAL REVIEW B 86, 104401 (2012)

 

[11] K. Penc, J. Romhányi, T. Rõõm, U. Nagel, Á. Antal, T. Fehér, A. Jánossy, H. Engelkamp, H. Murakawa, Y. Tokura, D. Szaller, S. Bordács, and I. Kézsmárki

Spin-stretching modes in non-centrosymmetric magnets: spin-wave excitations in the multiferroic Ba2CoGe2O7

PHYSICAL REVIEW LETTERS 108, 257203 (2012)

 

2011

 

[10] I. Kézsmárki, N. Kida, H. Murakawa, S. Bordács, Y. Onose, and Y. Tokura

Enhanced Directional Dichroism of Terahertz Light in Resonance with Magnetic Excitations of the Multiferroic Ba2CoGe2O7 Oxide Compound

PHYSICAL REVIEW LETTERS 106, 057403 (2011)

 

2010

 

[9] S. Bordács, I. Kézsmárki, K. Ohgushi, and Y. Tokura

Experimental band structure of the nearly half-metallic CuCr2Se4: an optical and magneto-optical study

NEW JOURNAL OF PHYSICS 12, 053039 (2010)

 

[8] L. Demkó, I. Kézsmárki, M. Csontos, S. Bordács, and G. Mihály

Improved thermal relaxation method for the simultaneous measurement of the specific heat and thermal conductivity

EUROPEAN PHYSICAL JOURNAL B 74, 27-33. (2010)

 

2009

 

[7] S. Bordács, D. Varjas, I. Kézsmárki, G. Mihály, L. Baldassarre, A. Abouelsayed, C.A. Kuntscher, K. Ohgushi, and Y. Tokura

Magnetic-order-induced crystal symmetry lowering in ACr2O4 ferrimagnetic spinels

PHYSICAL REVIEW LETTERS 103, 077205 (2009)

 

[6] S. Iguchi, S. Kumakura, Y. Onose, S. Bordács, I. Kézsmárki, N. Nagaosa, and Y. Tokura

Optical Probe for Anomalous Hall Resonance in Ferromagnets with Spin Chirality

PHYSICAL REVIEW LETTERS 103, 267206 (2009)

 

2008

 

[5] N. Hosaka, H. Yamada, Y. Shimada, J. Fujioka, S. Bordács, I. Kézsmárki, M. Kawasaki, and Y. Tokura

Magneto-Optical Characterization on the Ferromagnetic-Paramagnetic Transitions in the Composition-Spread Epitaxial Film of Sr1-xCaxRuO3

APPLIED PHYSICS EXPRESS 1, 113001 (2008)

 

[4] I. Kézsmárki, and S. Bordács

New type of ellipsometry in infrared spectroscopy: The double-reference method

APPLIED PHYSICS LETTERS 93, 131104 (2008)

 

[3] G. Mihály, M. Csontos, S. Bordács, I. Kézsmarki, T. Wojtowicz, X. Liu, B. Jankó, and J.K. Furdyna

Anomalous Hall effect in (In,Mn)Sb dilute magnetic semiconductor

PHYSICAL REVIEW LETTERS 100, 107201 (2008)

 

2007

 

[2] I. Kézsmárki, R Gáal, C.C. Homes, B. Sipos, H. Berger, S. Bordács, G. Mihály, and L. Forró

High-pressure infrared spectroscopy: Tuning of the low-energy excitations in correlated electron systems

PHYSICAL REVIEW B 76, 205114 (2007)

 

2006

 

[1] S. Bordács, A. Agod, Z. Hórvölgyi

Compression of Langmuir films composed of fine particles: Collapse mechanism and wettability

LANGMUIR 22, 6944 (2006)

 

[58] Á. Butykai, K. Geirhos, D. Szaller, L. F. Kiss, L. Balogh, M. Azhar, M. Garst, L. DeBeer-Schmitt, T. Waki, Y. Tabata, H. Nakamura, I. Kézsmárki and S. Bordács

Squeezing the periodicity of Néel-type magnetic modulations by enhanced Dzyaloshinskii-Moriya interaction of 4d electrons

NPJ QUANTUM MATERIALS 7, 26 (2022)