scholarly journals HHG-laser-based time- and angle-resolved photoemission spectroscopy of quantum materials

2021 ◽  
pp. 147105
Author(s):  
Takeshi Suzuki ◽  
Shik Shin ◽  
Kozo Okazaki
Keyword(s):  
Photoemission Spectroscopy ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Quantum Materials

Recent Advances in Topological Quantum Materials by Angle-Resolved Photoemission Spectroscopy

Matter ◽  
2020 ◽  
Vol 3 (4) ◽  
pp. 1114-1141
Author(s):  
Yujie Chen ◽  
Xu Gu ◽  
Yiwei Li ◽  
Xian Du ◽  
Lexian Yang ◽  
...  
Keyword(s):  
Photoemission Spectroscopy ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Recent Advances ◽  
Topological Quantum ◽  
Quantum Materials

Angle-Resolved Photoemission Spectroscopy Study of Topological Quantum Materials

2020 ◽  
Vol 50 (1) ◽  
pp. 131-153
Author(s):  
Chaofan Zhang ◽  
Yiwei Li ◽  
Ding Pei ◽  
Zhongkai Liu ◽  
Yulin Chen
Keyword(s):  
Electronic Structures ◽  
Photoemission Spectroscopy ◽  
Topological Invariants ◽  
New Materials ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Topological Quantum ◽  
Experimental Tool ◽  
Weyl Semimetals ◽  
Quantum Materials ◽  
Physical Phenomena

The recently discovered topological quantum materials (TQMs) have electronic structures that can be characterized by certain topological invariants. In these novel materials, the unusual bulk and surface electrons not only give rise to many exotic physical phenomena but also foster potential new technological applications. To characterize the unusual electronic structures of these new materials, investigators have used angle-resolved photoemission spectroscopy (ARPES) as an effective experimental tool to directly visualize the unique bulk and surface electronic structures of TQMs. In this review, we first give a brief introduction of TQMs and ARPES, which is followed by examples of the application of ARPES to different TQMs ranging from topological insulators to Dirac and Weyl semimetals. We conclude with a brief perspective of the current development of ARPES and its potential application in the study of TQMs.

scholarly journals Ultrafast angle-resolved photoemission spectroscopy of quantum materials

2016 ◽  
Vol 115 (2) ◽  
pp. 27001 ◽  
Author(s):  
Christopher L. Smallwood ◽  
Robert A. Kaindl ◽  
Alessandra Lanzara
Keyword(s):  
Photoemission Spectroscopy ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Quantum Materials

Visualizing electronic structures of quantum materials by angle-resolved photoemission spectroscopy

2018 ◽  
Vol 3 (9) ◽  
pp. 341-353 ◽  
Author(s):  
Haifeng Yang ◽  
Aiji Liang ◽  
Cheng Chen ◽  
Chaofan Zhang ◽  
Niels B. M. Schroeter ◽  
...  
Keyword(s):  
Electronic Structures ◽  
Photoemission Spectroscopy ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Quantum Materials

scholarly journals Evidence for a large Rashba splitting in PtPb4 from angle-resolved photoemission spectroscopy

2021 ◽  
Vol 103 (8) ◽  
Author(s):  
Kyungchan Lee ◽  
Daixiang Mou ◽  
Na Hyun Jo ◽  
Yun Wu ◽  
Benjamin Schrunk ◽  
...  
Keyword(s):  
Photoemission Spectroscopy ◽  
Angle Resolved Photoemission Spectroscopy

scholarly journals Observation of a singular Weyl point surrounded by charged nodal walls in PtGa

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
J.-Z. Ma ◽  
Q.-S. Wu ◽  
M. Song ◽  
S.-N. Zhang ◽  
E. B. Guedes ◽  
...  
Keyword(s):  
Density Functional ◽  
Density Functional Theory Calculations ◽  
Photoemission Spectroscopy ◽  
Functional Theory ◽  
Fermi Arc ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Fermi Arcs ◽  
Surface Projection ◽  
Applicable Range ◽  
Opposite Chirality

AbstractConstrained by the Nielsen-Ninomiya no-go theorem, in all so-far experimentally determined Weyl semimetals (WSMs) the Weyl points (WPs) always appear in pairs in the momentum space with no exception. As a consequence, Fermi arcs occur on surfaces which connect the projections of the WPs with opposite chiral charges. However, this situation can be circumvented in the case of unpaired WP, without relevant surface Fermi arc connecting its surface projection, appearing singularly, while its Berry curvature field is absorbed by nontrivial charged nodal walls. Here, combining angle-resolved photoemission spectroscopy with density functional theory calculations, we show experimentally that a singular Weyl point emerges in PtGa at the center of the Brillouin zone (BZ), which is surrounded by closed Weyl nodal walls located at the BZ boundaries and there is no Fermi arc connecting its surface projection. Our results reveal that nontrivial band crossings of different dimensionalities can emerge concomitantly in condensed matter, while their coexistence ensures the net topological charge of different dimensional topological objects to be zero. Our observation extends the applicable range of the original Nielsen-Ninomiya no-go theorem which was derived from zero dimensional paired WPs with opposite chirality.

Sign in / Sign up

Export Citation Format

Share Document