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We employ the non-equilibrium thermodynamics of currents and forces to describe the heat transport caused by a spin current in a Pt/YIG bilayer. By starting from the constitutive equations of the magnetization currents in both Pt and YIG,…

We report the experimental observation of the spin Seebeck effect (SSE) in Ag/CoFe noble metal/magnetic metal bilayers with a longitudinal structure. Thermal voltages jointly generated by the anomalous Nernst effect (ANE) and the SSE were…

Materials Science · Physics 2015-10-29 Y. Sheng , M. Y. Yang , Y. Cao , K. M. Cai , G. N. Wei , G. H. Yu , B. Zhang , X. Q. Ma , K. Y. Wang

We theoretically investigate effect of a transverse electric field generated by side gates and a vertical electric field generated by top, back gates on energy bands and transport properties of zigzag bilayer graphene ribbons (Bernal…

Mesoscale and Nanoscale Physics · Physics 2016-07-20 Thanh-Tra Vu , Van-Truong Tran

Bilayers of graphitic materials have potential applications in field effect transistors (FETs). A potential difference applied between certain ionic bilayers made from insulating graphitic materials such as BN, ZnO and AlN could reduce gap…

Mesoscale and Nanoscale Physics · Physics 2016-07-01 A. R. Davenport , J. P. Hague

We examine substrate-to-film interfacial phonon drag on typical spin Seebeck heterostructures, in particular studying the effect of ferromagnetic magnons on the phonon-electron drag dynamics at the interface. We investigate with high…

Materials Science · Physics 2018-04-20 Arati Prakash , Jack Brangham , Sarah J. Watzman , Fengyuan Yang , Joseph P. Heremans

We investigate several spin-related phenomena in a confined two-dimensional electron gas (2DEG) using the Hartree-Fock approximation for the mutual Coulomb interaction of the electrons. The exchange term of the interaction causes a large…

Condensed Matter · Physics 2007-05-23 Vidar Gudmundsson , Juan Jose Palacios

We report a tunable spin mixing conductance, up to $\pm 22\%$, in a Y${}_{3}$Fe${}_{5}$O${}_{12}$/Platinum (YIG/Pt) bilayer.This control is achieved by applying a gate voltage with an ionic gate technique, which exhibits a gate-dependent…

Mesoscale and Nanoscale Physics · Physics 2019-04-24 Ledong Wang , Zhijian Lu , Jianshu Xue , Peng Shi , Yufeng Tian , Yanxue Chen , Shishen Yan , Lihui Bai , Michael Harder

We discuss the effect of the spin-orbit interaction on the band structure, wave functions and low temperature conductance of long quasi-one-dimensional electron systems patterned in two-dimensional electron gases (2DEG). Our model for these…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 A. V. Moroz , C. H. W. Barnes

We consider a heterostructure consisting of a normal metal and a superconductor separated by a spin-active interface. At finite-bias voltages, spin-filtering and spin-mixing effects at the interface allow for an induced magnetization (spin…

Mesoscale and Nanoscale Physics · Physics 2014-08-29 Oleksii Shevtsov , Tomas Löfwander

We report on the deformation of microwave absorption spectra and of the inverse spin Hall voltage signals in thin film bilayers of yttrium iron garnet (YIG) and platinum at high microwave power levels in a 9.45-GHz TE011 cavity. As the…

Mesoscale and Nanoscale Physics · Physics 2015-02-19 J. Lustikova , Y. Shiomi , Y. Handa , E. Saitoh

We study the physical properties of a half-metallic ferromagnet$\mid$superconductor (HM$\mid$S) bilayer, allowing for an arbitrary bulk pairing symmetry of the superconductor and spin-dependent processes at the interface. In particular, we…

Superconductivity · Physics 2015-05-18 Jacob Linder , Mario Cuoco , Asle Sudbø

We report the first experimental demonstration that interface microstructure limits diffusive electrical spin injection efficiency across heteroepitaxial interfaces. A theoretical treatment shows that the suppression of spin injection due…

We report that Joule heating can be used to enhance the interfacial spin conductivity between a metal and an oxide. We observe that local annealing of the interface at about 550\,K by injecting large current densities…

We study the spin injection efficiency into single and bilayer graphene on the ferrimagnetic insulator Yttrium-Iron-Garnet (YIG) through an exfoliated tunnel barrier of bilayer hexagonal boron nitride (hBN). The contacts of two samples…

Mesoscale and Nanoscale Physics · Physics 2018-09-26 J. C. Leutenantsmeyer , T. Liu , M. Gurram , A. A. Kaverzin , B. J. van Wees

Spin injection across interfaces driven by ultrashort optical pulses on femtosecond timescales constitutes a new way to design spintronics applications. Targeted utilization of this phenomenon requires knowledge of the efficiency of…

Materials Science · Physics 2022-12-29 P. Elliott , A. Eschenlohr , J. Chen , S. Shallcross , U. Bovensiepen , J. K. Dewhurst , S. Sharma

A sharp potential barrier at the Si/SiGe interface introduces valley splitting (VS), which lifts the 2-fold valley degeneracy in strained SiGe/Si/SiGe quantum wells (QWs). This work examines in detail the effects of Si/SiGe interface…

Materials Science · Physics 2012-03-07 Zhengping Jiang , Neerav Kharche , Timothy Boykin , Gerhard Klimeck

A magnetoresistance effect induced by the Rashba spin-orbit interaction was predicted, but not yet observed, in bilayers consisting of normal metal and ferromagnetic insulator. Here, we present an experimental observation of this new type…

We study the superconducting diode effect (SDE) in a diffusive superconductor - normal metal (SN) bilayer subjected to an in-plane magnetic field. The supercurrent flows along the layers, perpendicular to the field. The SDE, manifested as…

Superconductivity · Physics 2026-04-13 Yuriy A. Dmitrievtsev , Yakov V. Fominov

On the basis of ab-initio total-energy electronic-structure calculations, we find that interface localized electron states at the SiC/SiO$_2$ interface emerge in the energy region between 0.3 eV below and 1.2 eV above the bulk…

Materials Science · Physics 2017-11-22 Yu-ichiro Matsushita , Atsushi Oshiyama

The magnetisation dynamics of yttrium iron garnet (Y3Fe5O12, YIG) are key to the operation of spintronic and microwave devices. Here, we report a pathway to manipulate the frequency, damping and absorption of YIG thin films via interface…