Magnetic Field Induced Orbital Polarization in Cubic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>YbInNi</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>: Determining the Quartet Ground State Using X-Ray Linear Dichroism

Willers, Thomas; Cezar, J. C.; Brookes, N. B.; Hu, Z.; Strigari, F.; Körner, Peter O.; Hollmann, N.; Schmitz, D.; Bianchi, A.; Fisk, Z.; Tanaka, A.; Tjeng, L. H.; Severing, A.

doi:10.1103/physrevlett.107.236402

Cited by 12 publications

(10 citation statements)

References 28 publications

(48 reference statements)

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“…• Charge order of high-Tc Superconductors (Blanco-Canosa et al, 2013;Comin et al, 2014;da Silva Neto et al, 2014;Fink et al, 2009;Ghiringhelli et al, 2012) • Coupling of electronic / lattice degrees of freedom in multiferroic materials (Glavic et al, 2013;Partzsch et al, 2011;Schierle et al, 2010;Schmitz-Antoniak et al, 2013;Skaugen et al, 2015) • Microcrystals of novel materials (Leininger et al, 2011;Matsuda et al, 2015) • Interfacial electronic properties in heterostructures (Frano et al, 2013;Wadati et al, 2009) • Element-speci c magnetic hysteresis loops (Radu et al, 2012) • Single molecular magnets (Bernien et al, 2015;Hermanns et al, 2013) • Electronic depth pro les • Electronic ground states and phase transitions in correlated materials (Schmitz et al, 2014;Strigari et al, 2013;Willers et al, 2012Willers et al, , 2011 • Magnetic clusters in carbon nanotubes (Shiozawa et al, 2015) • Nanoparticles for medical applications (Graf et al, 2015) • Magnetic semiconductors (Khalid et al, 2014) …”

Section: Applicationsmentioning

confidence: 99%

The UE46 PGM-1 beamline at BESSY II

Weschke

Schierle

2018

JLSRF

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Section: Applicationsmentioning

confidence: 99%

The UE46 PGM-1 beamline at BESSY II

Weschke

Schierle

2018

JLSRF

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“…Single crystal susceptibility measurements are a common way of determining wave functions in heavy fermion compounds. More recently, soft x-ray absorption spectroscopy with linear polarized light was shown to be a useful local probe to determine the anisotropy of the wave functions spectroscopically [22][23][24][25][26]. But both soft x-ray absorption spectroscopy and neutron scattering are governed by dipole transitions so that these methods are insensitive to anisotropies with a higher than twofold rotational axis and therefore cannot distinguish the two possible orientations of the Γ 7 orbital in the tetragonal (001) plane, which is synonym with not being able to determine the sign of α or B 4 4 .…”

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Determining the In-Plane Orientation of the Ground-State Orbital ofCeCu2Si2

et al. 2012

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We have successfully determined the hitherto unknown sign of the B(4)(4) Stevens crystal-field parameter of the tetragonal heavy-fermion compound CeCu(2)Si(2) using vector q-dependent nonresonant inelastic x-ray scattering experiments at the cerium N(4,5) edge. The observed difference between the two different directions, q∥[100] and q∥[110], is due to the anisotropy of the crystal-field ground state in the (001) plane and is observable only because of the utilization of higher than dipole transitions possible in nonresonant inelastic x-ray scattering. This approach allows us to go beyond the specific limitations of dc magnetic susceptibility, inelastic neutron scattering, and soft x-ray spectroscopy, and provides us with a reliable information about the orbital state of the 4f electrons relevant for the quantitative modeling of the quasiparticles and their interactions in heavy-fermion systems.

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“…Here, we extend over those results by examining the x-ray linear dichroism (XLD) and the anisotropic Ce 4f magnetic response detected by XMCD over a larger temperature range. These experiments yield valuable information on crystal field splitting [36][37][38][39][40] , Kondo screening 19 and magnetic coupling 40 in the specimens and we shall discuss in detail how we obtain these quantities from our experimental data. Moreover, we report on a low temperature anomaly in the (inverse) susceptibility, which we tentatively interpret as an independent signature of a coherence scale of T * ≈ 25 K. X-ray absorption experiments may thus serve as a powerful means to identify the various interaction scales which all contribute to the complexity in the behavior of Kondo lattice materials.…”

Section: Introductionmentioning

confidence: 99%

Kondo screening and beyond: An x-ray absorption and dichroism study ofCePt5/Pt(111)

Praetorius

Fauth

2017

Phys. Rev. B

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We use x-ray absorption spectroscopy as well as its linear and circular magnetic dichroisms to characterize relevant interactions and energy scales in the surface intermetallic CePt5/Pt(111). The experiments provide insight into crystal field splitting, effective paramagnetic moments, their Kondo screening and mutual interactions and thus into many aspects which typically determine the low temperature behavior of correlated rare earth compounds. Exploiting the tuneability of Ce valence through the thickness dependent epitaxial strain at the CePt5/Pt(111) interface, we are able to systematically investigate the impact of hybridization strength on these interactions. Considerable Kondo screening is indeed observed at all CePt5 thicknesses, and found to be strongest in case of strongest hybridization. While the magnetic response is commensurate with an impurity Kondo scale of TK > ∼ 10 2 K for specimen temperatures T > ∼ 30 K, this is no longer the case at lower temperature. Its detailed study by XMCD at one specific thickness of CePt5 reveals an anomaly of the susceptibility at T * ≈ 25 K instead, which we tentatively associate with the onset of lattice coherence. At lowest temperature we observe paramagnetic saturation with a small Ce 4f saturation magnetization. Within the framework of itinerant 4f electrons, saturation is due to a field induced Lifshitz transition involving a very heavy band with correspondingly small degeneracy temperature of TF ≈ 7 K. This small energy scale results in the persistence of Curie-Weiss behavior across the entire range of experimentally accessible temperatures (T > ∼ 2 K). Our work highlights the potential of magnetic circular dichroism studies in particular for Kondo and heavy fermion materials, which so far has remained largely unexplored.

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Magnetic Field Induced Orbital Polarization in CubicYbInNi4: Determining the Quartet Ground State Using X-Ray Linear Dichroism

Cited by 12 publications

References 28 publications

The UE46 PGM-1 beamline at BESSY II

The UE46 PGM-1 beamline at BESSY II

Determining the In-Plane Orientation of the Ground-State Orbital ofCeCu2Si2

Kondo screening and beyond: An x-ray absorption and dichroism study ofCePt5/Pt(111)

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