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For a massive quantum fermionic field, we investigate the vacuum expectation values (VEVs) of the charge and current densities induced by an external magnetic flux in a two-dimensional circular ring. Both the irreducible representations of…

高能物理 - 理论 · 物理学 2016-11-15 S. Bellucci , A. A. Saharian , A. Kh. Grigoryan

Chiral anomaly or Adler-Bell-Jackiw anomaly in Weyl semimetals (WSMs) has a significant impact on the electron transport behaviors, leading to remarkable longitudinal or planar electrical and thermoelectric transport phenomena in the…

介观与纳米尺度物理 · 物理学 2022-03-29 Chuanchang Zeng , Snehasish Nandy , Sumanta Tewari

The chiral kinetic theory is derived from exact spinor mean field equations without symmetry-breaking terms for large classes of SU(2) systems with spin-orbit coupling. The influence of the Wigner function's off-diagonal elements is worked…

强关联电子 · 物理学 2019-09-04 K. Morawetz

The transport properties of massless fermions in $3+1$ spacetime dimension have been in the focus of recent theoretical and experimental research. New transport properties appear as consequences of chiral anomalies. The most prominent is…

介观与纳米尺度物理 · 物理学 2018-05-09 Karl Landsteiner , Yan Liu

We discuss materials which owe their stability to external fields. These include: 1) external electric or magnetic fields, and 2) quantum vacuum fluctuations in these fields induced by suitable boundary conditions (the Casimir effect).…

综合物理 · 物理学 2014-07-18 John Swain , Allan Widom , Yogendra Srivastava

Weyl metal is regarded as a platform toward interacting topological states of matter, where its topological structure gives rise to anomalous transport phenomena, referred to as chiral magnetic effect and "negative" magneto-resistivity, the…

强关联电子 · 物理学 2014-05-29 Ki-Seok Kim , Heon-Jung Kim , M. Sasaki

We develop a semiclassical theory of sound absorption in Weyl semimetals in magnetic fields. We focus on the contribution to the absorption that stems from the existence of Berry monopoles in the band structure of such materials, or,…

介观与纳米尺度物理 · 物理学 2021-06-30 Ohad Antebi , D. A. Pesin , A. V. Andreev , Roni Ilan

Recently, the existence of massless chiral (Weyl) fermions has been postulated in a class of semi-metals with a non-trivial energy dispersion.These materials are now commonly dubbed Weyl semi-metals (WSM).One predicted property of Weyl…

Weyl semimetals are a three dimensional topological phase of matter with linearly dispersed Weyl points which appear in pairs and carry opposite chirality. The separation of paired Weyl points allows charge transfer between them in the…

介观与纳米尺度物理 · 物理学 2019-01-08 Salah Uddin , Wenye Duan , Jun Wang , Zhongshui Ma , Jun-Feng Liu

We investigate the vacuum expectation value of the fermionic current induced by a magnetic flux in a (2+1)-dimensional conical spacetime in the presence of a circular boundary. On the boundary the fermionic field obeys MIT bag boundary…

高能物理 - 理论 · 物理学 2010-11-12 E. R. Bezerra de Mello , V. B. Bezerra , A. A. Saharian , V. M. Bardeghyan

Spin-momentum locking in Weyl semimetals correlates the orbital motion of electrons with background magnetic textures. We show here that the dynamics of a magnetic texture in a magnetic Weyl semimetal induces a pumped electric current that…

介观与纳米尺度物理 · 物理学 2018-07-18 Yasufumi Araki , Kentaro Nomura

Weyl fermions, which are fermions with definite chiralities, can give rise to anomalous breaking of the symmetry of the physical system which they are a part of. In their (3+1)-dimensional realizations in condensed matter systems, i.e., the…

介观与纳米尺度物理 · 物理学 2014-10-17 Jimmy A. Hutasoit , Jiadong Zang , Radu Roiban , Chao-Xing Liu

For systems with charged chiral fermions, the imbalance of chirality in the presence of magnetic field generates an electric current - this is the Chiral Magnetic Effect (CME). We study the dynamical real-time evolution of electromagnetic…

高能物理 - 理论 · 物理学 2016-01-29 Yuji Hirono , Dmitri Kharzeev , Yi Yin

The manifestation of chiral anomaly in Weyl semimetals typically relies on the observation of longitudinal magnetoconductance (LMC) along with the planar Hall effect, with a specific magnetic field and angle dependence. Here we solve the…

介观与纳米尺度物理 · 物理学 2024-02-19 Gargee Sharma , S. Nandy , Sumanta Tewari

A topological defect in the form of the Abrikosov-Nielsen-Olesen vortex is considered as a gauge-flux-carrying tube that is impenetrable for quantum matter. Charged scalar matter field is quantized in the vortex background with the…

高能物理 - 理论 · 物理学 2016-03-04 Volodymyr M. Gorkavenko , Iryna V. Ivanchenko , Yurii A. Sitenko

We consider the classical magnetoresistance of a Weyl metal in which the electron Fermi surface possess nonzero fluxes of the Berry curvature. Such a system may exhibit large negative magnetoresistance with unusual anisotropy as a function…

介观与纳米尺度物理 · 物理学 2015-03-06 D. T. Son , B. Z. Spivak

We discuss the type of the general macroscopic parity-violating effects, when there is the current along the vortex, which is concentrated in the vortex core. We consider vortices in superfluids, which contain the Weyl points. In the vortex…

其他凝聚态物理 · 物理学 2017-04-05 G. E. Volovik

Measurements of magnetic induction near an ice rod in the strong electric field were carried out. Theoretical estimation of the magnetic induction was made. It was found that in the average the experimental values of magnetic induction were…

综合物理 · 物理学 2013-07-09 Alexander I. Korolev

The magnetic textures of Weyl semimetals are embedded into their topological structure and interact dynamically with it. Here, we examine electric field-induced structural phase transitions in domain walls mediated by the spin transfer…

材料科学 · 物理学 2023-07-20 Shiva Heidari , Reza Asgari , Dimitrie Culcer

We present an overview of our recent work on transport phenomena in Weyl metals, which may be connected to their nontrivial topological properties, particularly to chiral anomaly. We argue that there are two basic phenomena, which are…

介观与纳米尺度物理 · 物理学 2015-06-24 A. A. Burkov