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Spin-polarized scanning tunneling microscopy is used to identify the magnetic state of different thin films on a Re(0001) substrate, which becomes superconducting below 1.7 K. All magnetic films contain an Fe/Ir interface, which is known to…

Materials Science · Physics 2020-08-12 André Kubetzka , Jan M. Bürger , Roland Wiesendanger , Kirsten von Bergmann

Magnetic resonance in an ensemble of laser-cooled trapped Rb atoms is excited using a micro- cantilever with a magnetic tip. The cantilever is mounted on a multi-layer chip designed to capture, cool, and magnetically transport cold atoms.…

The symbiosis of strong interactions, flat bands, topology and symmetry has led to the discovery of exotic phases of matter, including fractional Chern insulators, correlated moir\'e topological superconductors, and Dirac and Weyl…

Despite intense research in the field of strongly correlated electron behavior for the past few decades, there has been very little effort to understand this phenomenon in nano particles of the Kondo lattices. In this article, we review the…

Strongly Correlated Electrons · Physics 2015-05-27 E. V. Sampathkumaran , K. Mukherjee , Kartik K Iyer , Niharika Mohapatra , Sitikantha D Das

We report a Fe K\beta x-ray emission spectroscopy study of local magnetic moments in the rare-earth doped iron pnictide Ca_{1-x}RE_xFe_2As_2 (RE=La, Pr, and Nd). In all samples studied the size of the Fe local moment is found to decrease…

Superconductivity · Physics 2013-01-28 H. Gretarsson , S. R. Saha , T. Drye , J. Paglione , Jungho Kim , D. Casa , T. Gog , W. Wu , S. R. Julian , Young-June Kim

The unusual band structure of carbon nanotubes (CNs) results in their remarkable magnetic properties. The application of magnetic field parallel to the tube axis can change the conducting properties of the CN from metallic to semiconducting…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Magdalena Marganska , Marek Szopa , Elzbieta Zipper

In this work, we present experimental data demonstrating the feasibility of magnetic object location using spin waves. The test structure includes a Y$_3$Fe$_2$(FeO$_4$)$_3$) (YIG) film with four micro-antennas placed on the edges. A…

Applied Physics · Physics 2022-07-27 Michael Balinskiy , Alexander Khitun

In this review, we present a summary of experimental studies of magnetism in Fe-based superconductors. The doping dependent phase diagram shows strong similarities to the generic phase diagram of the cuprates. Parent compounds exhibit…

Superconductivity · Physics 2010-05-19 M. D. Lumsden , A. D. Christianson

We carefully consider the interplay between ferromagnetism and the Kondo screening effect in the conventional Kondo lattice systems at finite temperatures. Within an effective mean-field theory for small conduction electron densities, a…

Strongly Correlated Electrons · Physics 2013-04-12 Yu Liu , Guang-Ming Zhang , Lu Yu

The unusual electronic and magnetic properties of the systems Ce$_3$Pd$_{20}$T$_6$ (T = Ge, Si) with two non-equivalent Ce positions are discussed. The logarithmic growth of resistance for both the systems confirms the presence of the Kondo…

Strongly Correlated Electrons · Physics 2015-04-27 V. N. Nikiforov , Yu. A. Koksharov , A. V. Gribanov , M. Baran , V. Yu. Irkhin

We analyze the criterion for the appearance of magnetic moments in quasicrystals approximants and liquids Al-Mn. In a Hartree-Fock scheme, it is shown that the Stoner criterion (Un_d(E_F) > 1) does not apply to these systems due to the…

Condensed Matter · Physics 2007-05-23 Guy Trambly de Laissardiere , Didier Mayou

The properties of rare-earth elements diluted in non-magnetic crystals make them a promising candidate for a quantum memory due to their limited Hilbert space. The control and readout of the qubit states require a highly sensitive…

Quantum Physics · Physics 2022-07-26 G. Franco-Rivera , J. Cochran , L. Chen , S. Bertaina , I. Chiorescu

We report on the spin densities in CeRuSn determined at elevated and at low temperatures using polarized neutron diffraction. At 285 K, where the CeRuSn crystal structure, commensurate with the CeCoAl type, contains two different…

Strongly Correlated Electrons · Physics 2016-11-04 K. Prokes , S. Hartwig , A. Gukasov , J. A. Mydosh , Y. -K. Huang , O. Niehaus , R. Pottgen

We measure the spin splitting in a magnetic field $B$ of localized states in single-electron transistors using a new method, inelastic spin-flip cotunneling. Because it involves only internal excitations, this technique gives the most…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 A. Kogan , S. Amasha , D. Goldhaber-Gordon , G. Granger , M. A. Kastner , Hadas Shtrikman

Submicron Hall magnetometry has been demonstrated as an efficient technique to probe extremely weak magnetic fields. In this letter, we analyze the possibility of employing it to detect single electron spin. Signal strength and readout time…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 Jinshuang Jin , Xin-Qi Li

We present Scanning Tunneling Spectroscopy measurements at 0.1 K using tips made of Al. At zero field, the atomic lattice and charge density wave of 2HNbSe2 are observed, and under magnetic fields the peculiar electronic surface properties…

Superconductivity · Physics 2008-05-30 I. Guillamon , H. Suderow , S. Vieira , P. Rodiere

Rare-earth ions are characterised by transitions with very narrow linewidths even in solid state crystals. Exceedingly long coherence times have been shown on both spin and optical transitions of rare-earth-ion doped crystals. A key factor,…

Sensitive detection of weak magnetic moments is an essential capability in many areas of nanoscale science and technology, including nanomagnetism, quantum readout of spins, and nanoscale magnetic resonance imaging. Here, we show that the…

Mesoscale and Nanoscale Physics · Physics 2016-10-03 Y. Tao , A. Eichler , T. Holzherr , C. L. Degen

Scanning tunneling microscopy using a CO-functionalized tip is combined with simulations to explore the impact of the CO tilt angle on topographies of a single Cu atom and CO molecule adsorbed on Cu(111). Images of the Cu atom acquired with…

Materials Science · Physics 2024-09-24 Ivan Abilio , Nicolas Néel , Jörg Kröger , Krisztián Palotás

We investigate the magnetic properties of a range of low-dimensional ferromagnets using a combination of first-principles calculations and atomistic spin dynamics simulations. This approach allows us to evaluate the ground state and finite…

Materials Science · Physics 2016-11-26 Lars Bergqvist , Andrea Taroni , Anders Bergman , Corina Etz , Olle Eriksson
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