scholarly journals Photonic spin Hall effect on the surfaces of type-I and type-II Weyl semimetals

Nanophotonics ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 715-723 ◽  
Author(s):  
Guang Yi Jia ◽  
Zhen Xian Huang ◽  
Qiao Yun Ma ◽  
Geng Li
Keyword(s):  
Hall Effect ◽  
Chemical Potential ◽  
Research Area ◽  
Spin Hall Effect ◽  
Transverse Spin ◽  
Type I ◽  
Type Ii ◽  
Incident Wavelength ◽  
Weyl Semimetal ◽  
Variation Trends

AbstractTopological optics is an emerging research area in which various topological and geometrical ideas are being proposed to design and manipulate the behaviors of photons. Here, the photonic spin Hall effect on the surfaces of topological Weyl semimetal (WSM) films was studied. Our results show that the spin-dependent splitting (i.e. photonic spin Hall shifts) induced by the spin-orbit interaction is little sensitive to the tilt αt of Weyl nodes and the chemical potential μ in type-I WSM film. In contrast, photonic spin Hall shifts in both the in-plane and transverse directions present versatile dependent behaviors on the αt and μ in type-II WSM film. In particular, the largest in-plane and transverse spin Hall shifts appear at the tilts between −2 and −3, which are ~40 and ~10 times of the incident wavelength, respectively. Nevertheless, the largest spin Hall shifts for type-II WSM film with positive αt are only several times of incident wavelength. Moreover, the photonic spin Hall shifts also exhibit different variation trends with decreasing the chemical potential for different signs of αt in type-II WSM films. This dependence of photonic spin Hall shifts on tilt orientation in type-II WSM films has been explained by time-reversal-symmetry-breaking Hall conductivities in WSMs.

scholarly journals Landau quantisation of photonic spin Hall effect in monolayer black phosphorus

Nanophotonics ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 225-233 ◽  
Author(s):  
Guangyi Jia ◽  
Geng Li ◽  
Yan Zhou ◽  
Xianglong Miao ◽  
Xiaoying Zhou
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Hall Effect ◽  
Oscillation Period ◽  
Black Phosphorus ◽  
Spin Hall Effect ◽  
Transverse Spin ◽  
Strong Impact ◽  
Incident Wavelength ◽  
The Rich

AbstractThe photonic spin Hall effect (PSHE) is a promising candidate for controlling the spin states of photons and exploiting next-generation photonic devices based on spinoptics. Herein, the influences of a perpendicular magnetic field on the PSHE appearing on the surface of monolayer black phosphorus (BP) are investigated. Results reveal that both the in-plane and transverse spin-dependent shifts are quantised and show an oscillating pattern due to the splitting of Landau levels (LLs) induced by the external magnetic field B. And the oscillation period of spin Hall shifts gradually increases with strengthening B because of the increase of LL spacings. By contrast, for a fixed magnetic field, as the LL spacings become smaller and smaller with increasing the LL index, the oscillation period of spin Hall shifts gradually decreases as the photonic energy increases. Moreover, it is possibly due to the synergistic role of intrinsic anisotropy, high crystallinity, and quantisation-incurred localised decreases in beating-like complex conductivities of the BP film, giant spin Hall shifts, hundreds of times of the incident wavelength, are obtained in both transverse and in-plane directions. These unambiguously confirm the strong impact of the external magnetic field on the PSHE and shed important insights into understanding the rich magneto-optical transport properties in anisotropic two-dimensional atomic crystals.

scholarly journals Spin Hall effect generated by fluctuating vortices in type-II superconductors

2021 ◽  
Vol 103 (13) ◽  
Author(s):  
Takuya Taira ◽  
Yusuke Kato ◽  
Masanori Ichioka ◽  
Hiroto Adachi
Keyword(s):  
Hall Effect ◽  
Spin Hall Effect ◽  
Type Ii ◽  
Type Ii Superconductors

Transport signatures of temperature-induced chemical potential shift and Lifshitz transition in layered type-II Weyl semimetal TaIrTe4

2D Materials ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 015020
Author(s):  
Yu Jian ◽  
Quansheng Wu ◽  
Meng Yang ◽  
Qi Feng ◽  
Junxi Duan ◽  
...  
Keyword(s):  
Chemical Potential ◽  
Type Ii ◽  
Potential Shift ◽  
Weyl Semimetal ◽  
Lifshitz Transition

scholarly journals Superconductivity in doped Weyl semimetal Mo0.9IR0.1Te2 with broken inversion symmetry

2021 ◽  
Author(s):  
Manasi Mandal ◽  
Chandan Patra ◽  
Anshu Kataria ◽  
Suvodeep Paul ◽  
Surajit Saha ◽  
...  
Keyword(s):  
Hall Effect ◽  
Chiral Anomaly ◽  
Inversion Symmetry ◽  
Type Ii ◽  
Promising Candidate ◽  
Planar Hall Effect ◽  
Topological Superconductor ◽  
Weyl Semimetal ◽  
Type Ii Superconductivity ◽  
Magneto Resistance

Abstract This work presents the emergence of superconductivity in Ir - doped Weyl semimetal T$_d$ - MoTe$_{2}$ with broken inversion symmetry. Chiral anomaly induced planar Hall effect and anisotropic magneto-resistance confirm the topological semimetallic nature of Mo$_{1-x}$Ir$_{x}$Te$_{2}$. Observation of weak anisotropic, moderately coupled type-II superconductivity in T$_d$ -Mo$_{1-x}$Ir$_{x}$Te$_{2}$ makes it a promising candidate for topological superconductor.

Planar Hall effect in the type-II Weyl semimetal Td−MoTe2

2018 ◽  
Vol 98 (4) ◽  
Author(s):  
F. C. Chen ◽  
X. Luo ◽  
J. Yan ◽  
Y. Sun ◽  
H. Y. Lv ◽  
...  
Keyword(s):  
Hall Effect ◽  
Type Ii ◽  
Planar Hall Effect ◽  
Weyl Semimetal

scholarly journals Ternary compound HfCuP: An excellent Weyl semimetal with the coexistence of type-I and type-II Weyl nodes

2020 ◽  
Vol 24 ◽  
pp. 523-528 ◽  
Author(s):  
Weizhen Meng ◽  
Xiaoming Zhang ◽  
Tingli He ◽  
Lei Jin ◽  
Xuefang Dai ◽  
...  
Keyword(s):  
Ternary Compound ◽  
Type I ◽  
Type Ii ◽  
Weyl Semimetal

Tunable and Enhanced Performance of Graphene-Assisted Plasmonic Sensor with Photonic Spin Hall Effect in Near Infrared: Analysis Founded on Graphene’s Chemical Potential and Components of Light Polarization

2021 ◽  
Author(s):  
Yogendra Kumar Prajapati ◽  
Jitendra B. Maurya ◽  
Anuj K Sharma
Keyword(s):  
Hall Effect ◽  
Near Infrared ◽  
Chemical Potential ◽  
Light Polarization ◽  
Spin Hall Effect ◽  
Graphene Monolayer ◽  
Chemical Doping ◽  
Plasmonic Structure ◽  
Sensing Applications ◽  
Variable Chemical

Abstract In this work, we propose a graphene-assisted plasmonic structure with photonic spin Hall effect (PSHE) for sensing applications in near infrared (NIR) with an emphasis on tunable and spin control aspects leading to enhanced performance. We comprehensively investigate PSHE in view of variable chemical doping of graphene monolayer in the structure and manipulation of the spin dependent splitting by considering single and cross polarization states. There is observed a considerable variation in spin shift due to increase in chemical potential or Pauli blocking, which fundamentally controls the light absorption by graphene. Our simulation results reveal that the amplified spin dependent shift is 1.13×104 times higher than the conventional spin dependent shift at 0.436 eV of graphene chemical potential. Further, this structure is utilised for sensing application, and it is observed that graphene-assisted plasmonic based structure possesses significantly greater spin dependent sensitivity (5.53 times), figure of merit (8.56 × 105 times), and extremely finer limit of detection (by a factor of 18.10) are achieved compared to the structure without graphene. The results indicate that chosing the proposed graphene-assisted plasmonic structure with variable chemical potential and light polarization components, an extremely enhanced sensing performance can be achieved. The results are consistent with the physical rationale and are particularly important for potential biosensing applications.

scholarly journals Anisotropic planar Hall effect in the type-II topological Weyl semimetal WTe2

2019 ◽  
Vol 100 (20) ◽  
Author(s):  
Peng Li ◽  
Chenhui Zhang ◽  
Yan Wen ◽  
Long Cheng ◽  
George Nichols ◽  
...  
Keyword(s):  
Hall Effect ◽  
Type Ii ◽  
Planar Hall Effect ◽  
Weyl Semimetal
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