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Contrary to prior calculations, the Ni-rich ordered structures of the Cr-Ni alloy system are found to be antiferromagnetic under semi-local density-functional theory. The optimization of local magnetic moments significantly increases the…

材料科学 · 物理学 2023-08-23 Flynn Walsh , Robert O. Ritchie , Mark Asta

Recent progress in high sensitivity Cosmic Microwave Background (CMB) polarization experiments opens up a window on large scale structure (LSS), as CMB polarization fluctuations on small angular scales can arise from a combination of LSS…

宇宙学与河外天体物理 · 物理学 2018-06-20 Chang Feng , Gilbert Holder

It is well known that the electronic thermal conductivity of clean compensated semimetals can be greatly enhanced over the electric conductivity by the availability of an ambipolar mechanism of conduction, whereby electrons and holes flow…

介观与纳米尺度物理 · 物理学 2021-01-04 Mohammad Zarenia , Alessandro Principi , Giovanni Vignale

Atomically thin materials with coupled magnetic and electric polarization are critical for developing energy-efficient and high-density spintronic devices, yet they remain scarce due to often conflicting requirements of stabilizing both…

介观与纳米尺度物理 · 物理学 2024-12-09 Lihao Zhang , Xiaoyu Wang , Qi Li , Haibo Xie , Liangliang Zhang , Lei Zhang , Jie Pan , Yingchun Cheng , Zhe Wang

Using a tight-binding model, we theoretically examine the anisotropic conductivity of the nodal line semimetal of a three-dimensional Dirac electron in a single-component molecular conductor [Pd(dddt)$_2$], which consists of four molecules…

材料科学 · 物理学 2018-11-15 Yoshikazu Suzumura

Altermagnets host unconventional spin-polarized bands despite zero net magnetization, but controlling their spin structure remains challenging. We propose a multi-field approach to engineer spin polarization in $d$-wave altermagnets using…

Unusual magnetic properties of Van der Waals type antiferromagnetic semiconductors make them highly attractive for spintronics and optoelectronics. A link between the magnetic and optical properties of those materials, required for…

To extend the applicability of density functional theory for superconductors (SCDFT) to systems with significant particle-hole asymmetry, we construct a new exchange-correlation kernel entering the gap equation. We show that the kernel is…

超导电性 · 物理学 2013-07-22 Ryosuke Akashi , Ryotaro Arita

We theoretically investigate electron spin injection and spin-polarization sensitive current detection at Schottky contacts between a ferromagnetic metal and an n-type or p-type semiconductor. We use spin-dependent continuity equations and…

凝聚态物理 · 物理学 2009-11-10 J. D. Albrecht , D. L. Smith

The electronic band structure of correlated Ca3Ru2O7 featuring an antiferromagnetic as well as a structural transition has been determined theoretically at high temperatures, which has led to the understanding of the remarkable properties…

We report a correlation between the spin polarization of the tunneling electrons (TSP) and the magnetic moment of amorphous CoFeB alloys. Such a correlation is surprising since the TSP involves s-like electrons close to the Fermi level…

材料科学 · 物理学 2009-11-13 P. V. Paluskar , R. Lavrijsen , M. Sicot , J. T. Kohlhepp , H. J. M. Swagten , B. Koopmans

Compensated magnetic orders that can split the spin-degeneracy of electronic bands have become a very active field of research. As opposed to spin-orbit coupling, the splitting resulting from these "altermagnets" is not a small relativistic…

介观与纳米尺度物理 · 物理学 2026-01-08 Saurav Sachin , Mathias S. Scheurer , Constantin Schrade , Sujit Manna

It is argued that electron density dynamic's response to phonons at the Brillouin zone boundary is the key factor in the superconductivity mechanism of MgB2 as well as of all superconducting compounds leading to a real space electron-hole…

超导电性 · 物理学 2020-05-15 T. Guerfi

The chiral helimagnet, $Cr_{1/3}NbS_{2}$, hosts exotic spin textures, whose influence on the magneto-transport properties, make this material an ideal candidate for future spintronic applications. To date, the interplay between macroscopic…

A microscopic theory of Cooper-pair fluctuations (CPFs) in a disordered 2D electron system with spin-orbit scatterings under parallel magnetic field is presented in light of the observation, at low temperatures, of large magnetoresistance…

超导电性 · 物理学 2025-09-17 Tsofar Maniv , Vladimir Zhuravlev

We describe how thermally induced spin fluctuations modify the electronic structures of two prototypical altermagnets, CrSb and MnTe, via application of the disordered local moment picture. For both materials, our self-consistent, ab initio…

材料科学 · 物理学 2026-03-17 Christopher D. Woodgate , Nabil Menai , Arthur Ernst , Julie B. Staunton

Colossal magnetoresistance (MR) is a well-known phenomenon, notably observed in hole-doped ferromagnetic manganites. It remains a major research topic due to its potential in technological applications. Though topological semimetals also…

The crystallization process and the magnetization of Cr diluted CoFeB was investigated in both ribbon samples and thin film samples with Cr content up to 30 at. %. A primary crystallization of bcc phase from an amorphous precursor in ribbon…

材料科学 · 物理学 2015-06-17 Yishen Cui , Manli Ding , S. Joseph Poon , T. Paul Adl , S. Keshavarz , Tim Mewes , Stuart A. Wolf , Jiwei Lu

The equiatomic PrGe single crystal was grown by Czochralski pulling method. The grown single crystal was found to have CrB-type orthorhombic crystal structure with the space group \textit{Cmcm} (#63). Transport and magnetization data reveal…

强关联电子 · 物理学 2012-10-30 Pranab Kumar Das , K. Ramesh Kumar , R. Kulkarni , S. K. Dhar , A. Thamizhavel

The spin Hall effect in a two-dimensional electron system on honeycomb lattice with both intrinsic and Rashba spin-orbit couplings is studied numerically. Integer quantized spin Hall conductance is obtained at zero Rashba coupling limit…

介观与纳米尺度物理 · 物理学 2009-11-11 L. Sheng , D. N. Sheng , C. S. Ting , F. D. M. Haldane
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