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We address the concomitant metal-insulator transition (MIT) and antiferromagnetic ordering in the novel pyrochlore iridate Eu2Ir2O7 by combining x-ray absorption spectroscopy, x-ray and neutron diffractions and density functional theory…

Spin-resolved scanning tunneling microscopy and spectroscopy studies of image-potential states on Gr/Fe/Ir(111) show their sensitivity to the spatial variation of the Gr-Fe distance, and of the interfacial charge and spin transfer within…

Mesoscale and Nanoscale Physics · Physics 2025-07-10 Maciej Bazarnik , Anika Schlenhoff

Spin crossover (SCO) complexes are highly flexible bistable molecular switches with two distinct spin states that can be switched into each other by external stimuli such as temperature, pressure, or light. In the condensed phase, this spin…

Recently, the possibility of exploiting the phenomenon of spin transition (ST) has been intensively investigated, therefore, it is particularly important to study the behavior of ST under various stimuli. Here, the shape and content of the…

The spin transition in LaCoO3 is investigated by temperature-dependent resonant soft X-ray emission spectroscopy near the Co 2p absorption edges. This element-specific technique is more bulk sensitive with respect to the temperature induced…

Strongly Correlated Electrons · Physics 2011-12-30 M. Magnuson , S. M. Butorin , C. Såthe , J. Nordgren , P. Ravindran

Epitaxial thin films of LaCoO_{3} (E-LCO) exhibit ferromagnetic order with a transition temperature T_c = 85 K, while polycrystalline thin LaCoO_{3} films (P-LCO) remain paramagnetic. The temperature-dependent spin-state structure for both…

Strongly Correlated Electrons · Physics 2009-11-13 C. Pinta , D. Fuchs , M. Merz , M. Wissinger , E. Arac , A. Samartsev , P. Nagel , S. Schuppler

We address the tunneling conductance and spin inelastic tunneling spectroscopy of localized paramagnetic moments in a superconducting environment, pertaining to recent measurements on Fe-octaethylporphyrin-chloride using superconducting…

Mesoscale and Nanoscale Physics · Physics 2015-05-29 P. Berggren , J. Fransson

We present a time-resolved angle-resolved photoelectron spectroscopy study of IrTe$_2$, which undergoes two first-order structural and charge-ordered phase transitions on cooling below 270 K and below 180 K. The possibility of inducing a…

Strongly Correlated Electrons · Physics 2018-03-14 C. Monney , A. Schuler , T. Jaouen , M. -L. Mottas , Th. Wolf , M. Merz , M. Muntwiler , L. Castiglioni , P. Aebi , F. Weber , M. Hengsberger

Spin-polarized scanning tunneling microscopy investigations reveal a significant increase of the magnetic period of spin spirals in three-atomic-layer-thick Fe films on Ir(111), from about 4nm at 8K to about 65nm at room temperature. We…

Mesoscale and Nanoscale Physics · Physics 2017-07-26 Aurore Finco , Levente Rózsa , Pin-Jui Hsu , André Kubetzka , Elena Vedmedenko , Kirsten von Bergmann , Roland Wiesendanger

Fluorescence lifetime imaging microscopy (FLIM) is a well-established technique with numerous imaging applications. Yet, one of the limitations of FLIM is that it provides information about the emitting state only. Here, we present an…

Biological Physics · Physics 2023-10-27 Pavel Malý , Dita Strachotová , Aleš Holoubek , Petr Heřman

The temperature dependence of the electrical resistivity and magnetoresistance of Xe-ion beam sputtered Fe-Cr multilayers has been investigated. The electrical resistivity between 5 and 300 K in the fully ferromagnetic state, obtained by…

Materials Science · Physics 2009-11-07 A. K. Majumdar , A. F. Hebard , Avinash Singh , D. Temple

Ab initio computations within the density functional theory are reported for the spin cross-over complex, [Fe(btz)$_{2}$(NCS)$_{2}$], where 3d$^6$ Fe$^{II}$ is characterized by High Spin (HS t$_{2g}^4$, e$_g^2$) and Low Spin (LS t$_{2g}^6$,…

Soft Condensed Matter · Physics 2008-03-25 L. Kabalan , S. F. Matar , M. Zakhour , J. F. Létard

In this work, we theoretically investigate the spin-Peltier effect in a heterostructure composed of graphene and a ferromagnetic insulator (FI). Using a microscopic formalism based on the characteristic spin-flip scattering length at the…

Mesoscale and Nanoscale Physics · Physics 2026-05-21 Xin Theng Lee , Xin Hu , Yuya Ominato , Masahiro Tatsuno , Takeo Kato , Mamoru Matsuo

Iron (II) complexes with substituted tris(pyrazolyl) ligands, which exhibit a thermally driven transition from a low-spin state at low temperatures to a high-spin state at elevated temperatures, have been studied by M\"ossbauer spectroscopy…

Magnetic skyrmions are nanoscale spin structures recently discovered at room temperature (RT) in multilayer films. Employing their novel topological properties towards exciting technological prospects requires a mechanistic understanding of…

Mesoscale and Nanoscale Physics · Physics 2018-02-13 Bhartendu Satywali , Fusheng Ma , Shikun He , M. Raju , Volodymyr P. Kravchuk , Markus Garst , Anjan Soumyanarayanan , C. Panagopoulos

Spectra of spin-forbidden and spin-allowed transitions in the mixed b$^3\Pi_u$ ~ A$^1\Sigma_u^+$ state of Na$_2$ are measured separately by two-photon excitation using a single tunable dye laser. The two-photon excitation produces Na*(3p)…

Chemical Physics · Physics 2009-11-13 Q. Zhang , Y. Chen , M. Keil

We have obtained mid-infrared optical absorption spectra of the S=1/2 quasi one-dimensional CuO using polarized transmission measurement and interpreted the spectra in terms of phonon assisted magnetic excitations. When the electric field…

Strongly Correlated Electrons · Physics 2009-11-16 SeongHoon Jung , Jooyeon Kim , E. J. Choi , Y. Sekio , T. Kimura , J. Lorenzana

The X-ray absorption near-edge structure (XANES) of Mn in a spin-crossover compound, [Mn$^{\textrm{III}}$(taa)], was studied in pulsed high magnetic fields up to 37T. By applying magnetic fields to the low-temperature low-spin (LS) state,…

Strongly Correlated Electrons · Physics 2015-03-14 Jim Long Her , Yasuhiro H. Matsuda , Motohiro Nakano , Yasuhiro Niwa , Yasuhiro Inada

We investigate the dependence of the inelastic spin excitation contribution to scanning tunneling spectroscopy recorded above Fe adsorbates on the InSb(110) surface at subkelvin temperatures, on bulk doping and tunnel junction resistance.…

Mesoscale and Nanoscale Physics · Physics 2011-02-21 Bruno Chilian , Alexander A. Khajetoorians , Jens Wiebe , Roland Wiesendanger

Mid-infrared photo-induced force microscopy (IR-PiFM/PiF-IR) enables high-resolution chemical imaging of surfaces with lateral resolution less than 5 nm. Here are some answers to questions about the physical background, practical handling…

Materials Science · Physics 2026-05-05 Daniela Täuber