نتایج جستجو برای: dirac semimetal

تعداد نتایج: 20016  

Journal: :Physical review letters 2014
Awadhesh Narayan Domenico Di Sante Silvia Picozzi Stefano Sanvito

We study with first-principles methods the interplay between bulk and surface Dirac fermions in three dimensional Dirac semimetals. By combining density functional theory with the coherent potential approximation, we reveal a topological phase transition in Na_{3}Bi_{1-x}Sb_{x} and Cd_{3}[As_{1-x}P_{x}]_{2} alloys, where the material goes from a Dirac semimetal to a trivial insulator upon chang...

2014
Hemian Yi Zhijun Wang Chaoyu Chen Youguo Shi Ya Feng Aiji Liang Zhuojin Xie Shaolong He Junfeng He Yingying Peng Xu Liu Yan Liu Lin Zhao Guodong Liu Xiaoli Dong Jun Zhang M. Nakatake M. Arita K. Shimada H. Namatame M. Taniguchi Zuyan Xu Chuangtian Chen Xi Dai Zhong Fang X. J. Zhou

The three-dimensional topological semimetals represent a new quantum state of matter. Distinct from the surface state in the topological insulators that exhibits linear dispersion in two-dimensional momentum plane, the three-dimensional semimetals host bulk band dispersions linearly along all directions. In addition to the gapless points in the bulk, the three-dimensional Weyl/Dirac semimetals ...

2016
Thuy-Anh Nguyen Dirk Backes Angadjit Singh Rhodri Mansell Crispin Barnes David A. Ritchie Gregor Mussler Martin Lanius Detlev Grützmacher Vijay Narayan

Topological insulators (TIs) are bulk insulators with exotic 'topologically protected' surface conducting modes. It has recently been pointed out that when stacked together, interactions between surface modes can induce diverse phases including the TI, Dirac semimetal, and Weyl semimetal. However, currently a full experimental understanding of the conditions under which topological modes intera...

Journal: :Nature communications 2014
Bohm-Jung Yang Naoto Nagaosa

A three-dimensional (3D) Dirac semimetal (SM) is the 3D analogue of graphene having linear energy dispersion around Fermi points. Owing to the nontrivial topology of electronic wave functions, the 3D Dirac SM shows nontrivial physical properties and hosts various exotic quantum states such as Weyl SMs and topological insulators under proper external conditions. There are several kinds of Dirac ...

2017
Raman Sankar G. Peramaiyan I. Panneer Muthuselvam Christopher J. Butler Klauss Dimitri Madhab Neupane G. Narsinga Rao M.-T. Lin F. C. Chou

High quality single crystal ZrSiS as a theoretically predicted Dirac semimetal has been grown successfully using a vapor phase transport method. The single crystals of tetragonal structure are easy to cleave into perfect square-shaped pieces due to the van der Waals bonding between the sulfur atoms of the quintuple layers. Physical property measurement results including resistivity, Hall coeffi...

Journal: :Nature materials 2016
Lunan Huang Timothy M McCormick Masayuki Ochi Zhiying Zhao Michi-To Suzuki Ryotaro Arita Yun Wu Daixiang Mou Huibo Cao Jiaqiang Yan Nandini Trivedi Adam Kaminski

In a type I Dirac or Weyl semimetal, the low-energy states are squeezed to a single point in momentum space when the chemical potential μ is tuned precisely to the Dirac/Weyl point. Recently, a type II Weyl semimetal was predicted to exist, where the Weyl states connect hole and electron bands, separated by an indirect gap. This leads to unusual energy states, where hole and electron pockets to...

2016
Yanwen Liu Xiang Yuan Cheng Zhang Zhao Jin Awadhesh Narayan Chen Luo Zhigang Chen Lei Yang Jin Zou Xing Wu Stefano Sanvito Zhengcai Xia Liang Li Zhong Wang Faxian Xiu

Dirac semimetals have attracted extensive attentions in recent years. It has been theoretically suggested that many-body interactions may drive exotic phase transitions, spontaneously generating a Dirac mass for the nominally massless Dirac electrons. So far, signature of interaction-driven transition has been lacking. In this work, we report high-magnetic-field transport measurements of the Di...

Journal: :npj Quantum Materials 2020

Journal: :Physical Review Letters 2012

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