Journal ArticleDOI
Chiral Phonons and Giant Magneto-Optical Effect in CrBr3 2D Magnet.
Tingting Yin,Kanchan Ulman,Sheng Liu,Andrés Granados del Águila,Yuqing Huang,Lifa Zhang,Marco Serra,David Sedmidubsky,Zdenek Sofer,Su Ying Quek,Qihua Xiong +10 more
TLDR
In this article, it was shown that 2D magnetic CrBr3 hosts chiral phonons at the Brillouin-zone center, which are linear combinations of the doubly-degenerate Eg phonons and exhibit clockwise and counterclockwise rotational vibrations corresponding to angular momenta of l = ± 1.Abstract:
Phonons with chirality determine the optical helicity of inelastic light scattering processes due to their nonzero angular momentum. Here it is shown that 2D magnetic CrBr3 hosts chiral phonons at the Brillouin-zone center. These chiral phonons are linear combinations of the doubly-degenerate Eg phonons, and the phonon eigenmodes exhibit clockwise and counterclockwise rotational vibrations corresponding to angular momenta of l = ± 1. Such Eg chiral phonons completely switch the polarization of incident circularly polarized light. On the other hand, the non-degenerate non-chiral Ag phonons display a giant magneto-optical effect under an external out-of-plane magnetic field, rotating the plane of polarization of the scattered linearly polarized light. The corresponding degree of polarization of the scattered light changes from 91% to -68% as the magnetic field strength increases from 0 to 5 T. In contrast, the chiral Eg modes display no field dependence. The results lay a foundation for the study of phonon chirality and magneto-optical phenomena in 2D magnetic materials, as well as their related applications, such as the phonon Hall effect, topological photonics, and Raman lasing.read more
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A review on two-dimensional (2D) magnetic materials and their potential applications in spintronics and spin-caloritronic
Ehsan Elahi,Ghulam Dastgeer,Ghazanfar Nazir,Sobia Nisar,Mudasar Bashir,Haroon Akhter Qureshi,Deok-kee Kim,Jamal Aziz,Muhammad Aslam,Kashif Hussain,Mohammed A. Assiri,Muhammad Imran +11 more
TL;DR: In this paper , the authors have comprehensively discussed magnetic tunnel junction (MTJ), the heterostructure of 2D magnetic materials with TMDCs, the spin transport properties based on the Anomalous Hall Effect (AHE), and the thermal mobilization of electron's spins which generates the spin voltage in ferromagnetic materials.
Journal ArticleDOI
Spin–Phonon Coupling in Ferromagnetic Monolayer Chromium Tribromide
Jiang-Bin Wu,Yunpeng Yao,Miao-Ling Lin,Malte Rösner,Zhonghao Du,Kenji Watanabe,Takashi Taniguchi,Ping-Heng Tan,S. Haas,Han Wang +9 more
TL;DR: In this paper , the spin-phonon coupling (SPC) typically plays a crucial role in magnetic fluctuations, magnon dissipation, and ultimately establishing long-range ferromagnetic order.
Journal ArticleDOI
Effective magnetic fields induced by chiral phonons
TL;DR: In this paper , the Biot-Savart law was used to predict the effective magnetic fields induced by chiral phonons in the point-charge model, and the average effective magnetic field per mode for a specific location within a unit cell can reach the order of 0.01 T at room temperature.
Journal ArticleDOI
Chiral phonons in binary compounds $A$Bi ($A$ = K, Rb, Cs) with P2$_1$/c structure
TL;DR: In this paper , the authors showed that the two-fold rotational symmetry axis affects the main properties of the chiral phonons, which are not realized at the high-symmetry points, but along some paths between them in the reciprocal space.
Journal ArticleDOI
Chiral phonons in lattices with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>C</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math> symmetry
Qianqian Wang,Si-Dian Li,Jiaojiao Zhu,Hao Chen,Weikang Wu,Weibo Gao,Lifa Zhang,Shengyuan A. Yang +7 more
TL;DR: In this article , the authors investigated chiral phonons in systems with fourfold rotational symmetry and showed that chiral lattices can be found in both 2D square lattices and 3D tetragonal lattices.
References
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Projector augmented-wave method
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QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials
Paolo Giannozzi,Stefano Baroni,Stefano Baroni,Nicola Bonini,Matteo Calandra,Roberto Car,Carlo Cavazzoni,Davide Ceresoli,Guido L. Chiarotti,Matteo Cococcioni,Ismaila Dabo,Andrea Dal Corso,Andrea Dal Corso,Stefano de Gironcoli,Stefano de Gironcoli,Stefano Fabris,Stefano Fabris,Guido Fratesi,Ralph Gebauer,Ralph Gebauer,Uwe Gerstmann,Christos Gougoussis,Anton Kokalj,Michele Lazzeri,Layla Martin-Samos,Nicola Marzari,Francesco Mauri,Riccardo Mazzarello,Stefano Paolini,Alfredo Pasquarello,Lorenzo Paulatto,Lorenzo Paulatto,Carlo Sbraccia,Sandro Scandolo,Sandro Scandolo,Gabriele Sclauzero,Gabriele Sclauzero,Ari P. Seitsonen,Alexander Smogunov,Paolo Umari,Renata M. Wentzcovitch +40 more
TL;DR: QUANTUM ESPRESSO as discussed by the authors is an integrated suite of computer codes for electronic-structure calculations and materials modeling, based on density functional theory, plane waves, and pseudopotentials (norm-conserving, ultrasoft, and projector-augmented wave).
Journal ArticleDOI
Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
Paolo Giannozzi,Stefano Baroni,Nicola Bonini,Matteo Calandra,Roberto Car,Carlo Cavazzoni,Davide Ceresoli,Guido L. Chiarotti,Matteo Cococcioni,Ismaila Dabo,A. Dal Corso,Stefano Fabris,Guido Fratesi,S. de Gironcoli,Ralph Gebauer,U. Gerstmann,Christos Gougoussis,Anton Kokalj,Michele Lazzeri,Layla Martin-Samos,Nicola Marzari,Francesco Mauri,Riccardo Mazzarello,Stefano Paolini,Alfredo Pasquarello,Lorenzo Paulatto,Carlo Sbraccia,Sandro Scandolo,Gabriele Sclauzero,Ari P. Seitsonen,Alexander Smogunov,Paolo Umari,Renata M. Wentzcovitch +32 more
TL;DR: Quantum ESPRESSO as discussed by the authors is an integrated suite of computer codes for electronic-structure calculations and materials modeling, based on density functional theory, plane waves, and pseudopotentials (norm-conserving, ultrasoft, and projector-augmented wave).
Journal ArticleDOI
First principles phonon calculations in materials science
Atsushi Togo,Isao Tanaka +1 more
TL;DR: In this paper, the authors demonstrate phonon properties with fundamental equations and show examples how the phonon calculations are applied in materials science, and demonstrate the importance of first principles phonon calculation in dynamical behaviors and thermal properties.