Discovery of a Three-Dimensional Topological Dirac Semimetal, Na3Bi
Zhongkai Liu,Bo Zhou,Bo Zhou,Yong Zhang,Zhijun Wang,Hongming Weng,Dharmalingam Prabhakaran,Sung-Kwan Mo,Zhi-Xun Shen,Zhong Fang,Xi Dai,Zahid Hussain,Yulin Chen,Yulin Chen +13 more
TLDR
In this article, 3D Dirac fermions with linear dispersions along all momentum directions were detected in 3D topological Dirac semimetals (TDSs) with angle-resolved photoemission spectroscopy.Abstract:
Three-dimensional (3D) topological Dirac semimetals (TDSs) represent an unusual state of quantum matter that can be viewed as “3D graphene.” In contrast to 2D Dirac fermions in graphene or on the surface of 3D topological insulators, TDSs possess 3D Dirac fermions in the bulk. By investigating the electronic structure of Na 3 Bi with angle-resolved photoemission spectroscopy, we detected 3D Dirac fermions with linear dispersions along all momentum directions. Furthermore, we demonstrated the robustness of 3D Dirac fermions in Na 3 Bi against in situ surface doping. Our results establish Na 3 Bi as a model system for 3D TDSs, which can serve as an ideal platform for the systematic study of quantum phase transitions between rich topological quantum states.read more
Citations
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Weyl and Dirac semimetals in three-dimensional solids
TL;DR: Weyl and Dirac semimetals as discussed by the authors are three-dimensional phases of matter with gapless electronic excitations that are protected by topology and symmetry, and they have generated much recent interest.
Journal ArticleDOI
Experimental Discovery of Weyl Semimetal TaAs
B. Q. Lv,Hongming Weng,B. B. Fu,Xiaoping Wang,Xiaoping Wang,Hu Miao,Junzhang Ma,Pierre Richard,Xiaochun Huang,Lingxiao Zhao,Genfu Chen,Zhong Fang,Xi Dai,Tian Qian,Hong Ding +14 more
TL;DR: Weyl fermions possess exotic properties and can act like magnetic monopoles as discussed by the authors, and TaAs is a Weyl semimetal, demonstrating for the first time that Weyl semi-metals can be identified experimentally.
Journal ArticleDOI
New perspectives for Rashba spin–orbit coupling
TL;DR: Bychkov and Rashba as discussed by the authors introduced a simple form of spin-orbit coupling to explain the peculiarities of electron spin resonance in two-dimensional semiconductors, which has inspired a vast number of predictions, discoveries and innovative concepts far beyond semiconductor devices.
Journal ArticleDOI
Negative magnetoresistance without well-defined chirality in the Weyl semimetal TaP
Frank Arnold,Chandra Shekhar,Shu-Chun Wu,Yan Sun,Ricardo Donizeth dos Reis,Nitesh Kumar,Marcel Naumann,M. O. Ajeesh,Marcus Schmidt,Adolfo G. Grushin,Jens H. Bardarson,Michael Baenitz,Dmitry A. Sokolov,Horst Borrmann,Michael Nicklas,Claudia Felser,Elena Hassinger,Binghai Yan +17 more
TL;DR: This work establishes the detailed Fermi-surface topology of the recently identified WSM TaP via combined angle-resolved quantum-oscillation spectra and band-structure calculations and observes a large negative longitudinal magnetoresistance.
Journal ArticleDOI
A stable three-dimensional topological Dirac semimetal Cd3As2
Zhongkai Liu,Juan Jiang,Bo Zhou,Zhijun Wang,Yi Zhang,Hongming Weng,Dharmalingam Prabhakaran,Sung-Kwan Mo,Han Peng,Pavel Dudin,Timur K. Kim,Moritz Hoesch,Zhong Fang,Xi Dai,Zhi-Xun Shen,Donglai Feng,Zahid Hussain,Yulin Chen +17 more
TL;DR: In this paper, it was shown that Cd3As2 is an experimental realization of a 3D Dirac semimetal that is stable at ambient conditions, using angle-resolved photoelectron spectroscopy.
References
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Journal ArticleDOI
Generalized Gradient Approximation Made Simple
TL;DR: A simple derivation of a simple GGA is presented, in which all parameters (other than those in LSD) are fundamental constants, and only general features of the detailed construction underlying the Perdew-Wang 1991 (PW91) GGA are invoked.
Journal ArticleDOI
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set.
Georg Kresse,Jürgen Furthmüller +1 more
TL;DR: An efficient scheme for calculating the Kohn-Sham ground state of metallic systems using pseudopotentials and a plane-wave basis set is presented and the application of Pulay's DIIS method to the iterative diagonalization of large matrices will be discussed.
Journal ArticleDOI
Projector augmented-wave method
TL;DR: An approach for electronic structure calculations is described that generalizes both the pseudopotential method and the linear augmented-plane-wave (LAPW) method in a natural way and can be used to treat first-row and transition-metal elements with affordable effort and provides access to the full wave function.
Journal ArticleDOI
From ultrasoft pseudopotentials to the projector augmented-wave method
Georg Kresse,Daniel P. Joubert +1 more
TL;DR: In this paper, the formal relationship between US Vanderbilt-type pseudopotentials and Blochl's projector augmented wave (PAW) method is derived and the Hamilton operator, the forces, and the stress tensor are derived for this modified PAW functional.
Journal ArticleDOI
Electric Field Effect in Atomically Thin Carbon Films
Kostya S. Novoselov,Andre K. Geim,Sergey V. Morozov,Da Jiang,Y. Zhang,S. V. Dubonos,Irina V. Grigorieva,A. A. Firsov +7 more
TL;DR: Monocrystalline graphitic films are found to be a two-dimensional semimetal with a tiny overlap between valence and conductance bands and they exhibit a strong ambipolar electric field effect.
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