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The electronic structure is found to be understandable in terms of free-atom term values and universal interorbital coupling parameters, since self-consistent tight-binding calculations indicate that Coulomb shifts of the d-state energies…

Materials Science · Physics 2009-11-13 Walter A. Harrison

We present results for the electronic and magnetic structure of Mn and Fe clusters on Nb(110) surface, focusing on building blocks of atomic chains as possible realizations of topological superconductivity. The magnetic ground states of the…

Mesoscale and Nanoscale Physics · Physics 2021-09-29 András Lászlóffy , Krisztián Palotás , Levente Rózsa , László Szunyogh

Potassium (K) intercalated manganese phthalocyanine (MnPc) reveals vast changes of its electronic states close to the Fermi level. However, theoretical studies are controversial regarding the electronic configuration. Here, MnPc doped with…

Using {\it ab initio} total energy density-functional theory calculations, we investigate the electronic, structural and magnetic properties of Manganese doped Germanium nanowires. The nanowires have been constructed along the [110]…

Materials Science · Physics 2016-08-16 J. T. Arantes , Antônio J. R. da Silva , A. Fazzio

Magnetic adatoms coupled to an $s$-wave superconductor give rise to local bound states, so-called Yu-Shiba-Rusinov states. Focusing on the ultimate goal of tailoring chains of such adatoms into a topologically superconducting phase, we…

Superconductivity · Physics 2023-02-15 Philip Beck , Lucas Schneider , Roland Wiesendanger , Jens Wiebe

We present a systematic study of the electronic and magnetic properties of transition-metal (TM) atomic chains adsorbed on the zigzag single-wall carbon nanotubes (SWNTs). We considered the adsorption on the external and internal wall of…

Other Condensed Matter · Physics 2009-11-11 Engin Durgun , Salim Ciraci

Polarization-dependent x-ray absorption spectroscopy at the B 1s edge of single-crystalline Mg(x)Al(1-x)B(2) reveals a strongly anisotropic electronic structure near the Fermi energy. Comparing spectra for superconducting compounds (x=0.9,…

Using first-principles calculations, we studied Mn$_2$RuZ (Z=Al, Ga, Si, Ge) and their heterojunctions with MgO along (001) direction. All these alloys possess Hg$_2$CuTi-type inverse Heusler alloy structure and ferrimagnetic ground state.…

Materials Science · Physics 2021-05-26 Tufan Roy , Masahito Tsujikawa , Masafumi Shirai

Despite the intensive interest in copper- and nickel-based superconductivity in infinite-layer structures, the physical properties of many other infinite-layer transition-metal oxides remain largely unknown. Here we unveil, by the…

Materials Science · Physics 2023-09-01 Heng Jin , Bing Huang

The low-temperature properties of the so-called ''charge ordered'' state in 50% doped perovskite manganites are described from the viewpoint of the magnetic spin ordering. In these systems, the zigzag antiferromagnetic ordering, combined…

Strongly Correlated Electrons · Physics 2007-05-23 I. V. Solovyev

A theoretical study of the electronic properties of nanodisks and nanocones is presented within the framework of a tight-binding scheme. The electronic densities of states and absorption coefficients are calculated for such structures with…

Mesoscale and Nanoscale Physics · Physics 2013-02-27 P. Ulloa , M. Pacheco , L. E. Oliveira , A. Latge

We report measurements on Ti$_4$MnBi$_2$, where a crystal structure involving linear chains of Mn ions suggests one-dimensional magnetic character. The electrical resistivity is metallic, consistent with the results of electronic structure…

Strongly Correlated Electrons · Physics 2020-07-15 Abhishek Pandey , Ping Miao , M. Klemm , H. He , H. Wang , X. Qian , J. W. Lynn , M. C. Aronson

Mn has been found to self-assemble into atomic chains running perpendicular to the surface dimer reconstruction on Si(001). They differ from other atomic chains by a striking asymmetric appearance in filled state scanning tunneling…

Mesoscale and Nanoscale Physics · Physics 2015-12-23 R. Villarreal , M. Longobardi , S. A. Köster , Ch. J. Kirkham , D. Bowler , Ch. Renner

The first angle-resolved photoemission spectroscopy results from MgB$_2$ single crystals are reported. Close to the $\Gamma$K and $\Gamma$M directions, three distinct dispersions are observed approaching the Fermi energy, as can be assigned…

Superconductivity · Physics 2016-08-31 H. Uchiyama , K. M. Shen , S. Lee , A. Damascelli , D. H. Lu , D. L. Feng , Z. -X. Shen , S. Tajima

Geometrically frustrated magnetic semiconductor $\textrm{CuMnO}_{2}$ has potential applications as photo-catalyst, in photochemical cells and multi-ferroic devices. Electronic band structure in the antiferromagnetic and ferromagnetic phases…

Materials Science · Physics 2024-06-05 Apurba Sarkar , Joydeep Chatterjee , Arghya Taraphder , Nandan Pakhira

The spectrum of spinless, non-interacting electrons on a linear chain that is buckled in a non- uniform manner giving it a flavor of a topologically disordered lattice, is investigated within a tight binding formalism. We have addressed two…

Disordered Systems and Neural Networks · Physics 2017-06-07 Amrita Mukherjee , Atanu Nandy , Arunava Chakrabarti

We have studied in details the electronic structure and magnetism in M (Mn and Cr) doped semiconducting half-Heusler compounds FeVSb, CoTiSb and NiTiSn (XM$_{x}$Y$_{1-x}$Z) in a wide concentration range using local-spin density functional…

Materials Science · Physics 2007-05-23 B. R. K. Nanda , I. Dasgupta

A Mn dopant in a III-V semiconductor produces a highly-entangled, coherent triplet ground state not fully captured by single-determinant theories of electron structure. We directly construct an analytic form for its ground-state…

Mesoscale and Nanoscale Physics · Physics 2025-12-02 Julian Zanon , Michael E. Flatté

Low temperature scanning tunneling spectroscopy of HfNiSn shows a V^m(m < 1) zero bias anomaly around the Fermi level. This local density of states with a fractional power law shape is well known to be a consequence of electronic…

Disordered Systems and Neural Networks · Physics 2020-12-09 Minjie Lu , Hao Chen , Glenn Agnolet

In this note, we calculate the electronic properties of a realistic atomistic model of amorphous graphene. The model contains odd membered rings, particularly five and seven membered rings and no coordination defects. We show that…

Strongly Correlated Electrons · Physics 2009-12-04 V. Kapko , D. A. Drabold , M. F. Thorpe
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