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A ferrimagnetic spin model composed of $S=1/2$ spin-dimers and $S=5/2$ spin-chains is studied by combining the bond-operator representation (for $S=1/2$ spin-dimers) and Holstein-Primakoff transformation (for $S=5/2$ spins). A finite…

强关联电子 · 物理学 2015-05-14 Bao Xu , Han-Ting Wang , Yupeng Wang

We review the conditions that cause or prohibit non-relativistic spin splitting of the energy bands in antiferromagnets. We propose that the existence of spin splitting in magnetically ordered systems is the default scenario and outline the…

材料科学 · 物理学 2026-02-20 Nicola A. Spaldin , Sang-Wook Cheong , Sinead Griffin

Energy bands in antiferromagnets are generally spin degenerate in the absence of spin-orbit coupling (SOC). Recent studies [Physical Review B 102, 014422 (2020)] identified formal symmetry conditions for crystals for which this degeneracy…

材料科学 · 物理学 2022-11-16 Lin-Ding Yuan , Alex Zunger

We describe theoretically the process of multi-beam reflection in a two-dimensional electron system with a lateral potential barrier. Due to spin-orbital interaction, the reflection process leads to the formation of three beams with…

介观与纳米尺度物理 · 物理学 2009-11-10 A. O. Govorov , A. V. Kalameitsev , J. P. Dulka

We investigate theoretically the prospects for using a magnetic nanoelectromechanical single-electron tunneling (NEM-SET) device as an electronic spin filter. We find that strong magnetic exchange forces on the net spin of the mobile…

介观与纳米尺度物理 · 物理学 2012-09-25 Robert I. Shekhter , Artem Pulkin , Mats Jonson

Centrosymmetric antiferromagnetic semiconductors, although abundant in nature, seem less promising than ferromagnets and ferroelectrics for practical applications in semiconductor spintronics. As a matter of fact, the lack of spontaneous…

材料科学 · 物理学 2022-10-31 Hong Jian Zhao , Xinran Liu , Yanchao Wang , Yurong Yang , Laurent Bellaiche , Yanming Ma

The ground state of a molecular diamond-lattice compound (ET)Ag$_4$(CN)$_5$ is investigated by the magnetization and nuclear magnetic resonance spectroscopy. We found that the system exhibits antiferromagnetic long-range ordering with weak…

Frustration in magnetic systems is fertile ground for complex behaviour, including unconventional ground states with emergent symmetries, topological properties, and exotic excitations. A canonical example is the emergence of…

The novel electronic state of the canted antiferromagnetic (AFM) insulator, strontium iridate (Sr2IrO4) has been well described by the spin-orbit-entangled isospin Jeff = 1/2, but the role of isospin in transport phenomena remains poorly…

The experimental observation of the Dirac fermion states in $\beta_{12}$-borophene sheets and the discovery of their novel topological properties properties have made them a promising candidate for spintronic applications. Here, by…

介观与纳米尺度物理 · 物理学 2022-01-05 Fahimeh Norouzi , Mohsen Farokhnezhad , Mahdi Esmaeilzadeh , Bartlomiej Szafran

Spintronic and nanomagnetic devices often derive their functionality from layers of different materials and the interfaces between them. This is especially true for synthetic antiferromagnets - two or more ferromagnetic layers that are…

介观与纳米尺度物理 · 物理学 2017-05-31 R. A. Duine , Kyung-Jin Lee , Stuart S. P. Parkin , M. D. Stiles

The Stern-Gerlach (SG) effect is well known as the spin-dependent splitting of a beam of atoms carrying magnetic moments by a magnetic-field gradient, leading to the concept of electron spin. Antiferromagnets can accommodate two magnon…

介观与纳米尺度物理 · 物理学 2022-07-01 Zhenyu Wang , Weiwei Bao , Yunshan Cao , Peng Yan

The ground state of K$_{0.8+x}$Fe$_{1.6+y}$Se$_2$ and other iron-based selenide superconductors are doped antiferromagnetic semiconductors. There are well defined iron local moments whose energies are separated from those of conduction…

超导电性 · 物理学 2015-05-27 G. M. Zhang , Z. Y. Lu , T. Xiang

Antiferromagnets display enormous potential in spintronics owing to its intrinsic nature, including terahertz resonance, multilevel states, and absence of stray fields. Combining with the layered nature, van der Waals (vdW) antiferromagnets…

Dynamic nuclear polarisation, which transfers the spin polarisation of electrons to nuclei, is routinely applied to enhance the sensitivity of nuclear magnetic resonance; it is also critical in spintronics, particularly when spin…

An attractive feature of magnetic adatoms and molecules for nanoscale applications is their superparamagnetism, the preferred alignment of their spin along an easy axis preventing undesired spin reversal. The underlying magnetic anisotropy…

介观与纳米尺度物理 · 物理学 2014-07-22 Maciej Misiorny , Michael Hell , Maarten R. Wegewijs

In this review we demonstrate that superconducting pairing, mediated by the exchange of spin fluctuations, is a viable alternative to conventional phonon-mediated pairing. We discuss in detail the normal state properties, the spin…

强关联电子 · 物理学 2007-05-23 Andrey V. Chubukov , David Pines , Joerg Schmalian

Beyond conventional ferromagnetism and antiferromagnetism, altermagnetism is a recently discovered unconventional magnetic phase characterized by time-reversal symmetry breaking and spin-split band structures in materials with zero net…

Altermagnetism combines momentum-dependent spin splitting of opposite-spin channels with zero net magnetization, enabling electric-field control of spin transport that is robust against external magnetic fields. Although widely explored in…

材料科学 · 物理学 2026-04-21 Hongde Yu , Thomas Brumme , Thomas Heine

Damping in magnetization dynamics characterizes the dissipation of magnetic energy and is essential for improving the performance of spintronics-based devices. While the damping of ferromagnets has been well studied and can be artificially…

材料科学 · 物理学 2017-11-15 Qian Liu , H. Y. Yuan , Ke Xia , Zhe Yuan