Centrosymmetric TiS as a novel topological electronic material with coexisting type-I, type-II and hybrid nodal line states

2020 ◽  
Vol 8 (40) ◽  
pp. 14109-14116
Author(s):  
Long Xu ◽  
Xiaoming Zhang ◽  
Weizhen Meng ◽  
Tingli He ◽  
Ying Liu ◽  
...  
Keyword(s):  
Electronic Material ◽  
Nodal Line ◽  
Type I ◽  
Type Ii ◽  
Native State ◽  
Nodal Lines

TiS is a novel topological material with coexisting type-I, type-II and hybrid nodal lines in the native state.

Strain tuning of closed topological nodal lines and opposite pockets in quasi-two-dimensional α-phase FeSi2

2020 ◽  
Vol 22 (24) ◽  
pp. 13650-13658 ◽  
Author(s):  
Xiaotian Wang ◽  
Zhenxiang Cheng ◽  
Gang Zhang ◽  
Minquan Kuang ◽  
Xiao-Lin Wang ◽  
...  
Keyword(s):  
Mechanical Strain ◽  
Nodal Line ◽  
Type I ◽  
Type Ii ◽  
Two Dimensional ◽  
Nodal Lines ◽  
Hybrid Type ◽  
Α Phase ◽  
Single Material

α-FeSi2 is a valuable candidate for spintronics application by utilization of type I, type II, and hybrid-type topological nodal line semimetals in a single material tuned by mechanical strain.

Coexistence of type-I and type-II nodal lines in monolayer TiBF

2020 ◽  
Vol 310 ◽  
pp. 113839
Author(s):  
Jie Shang ◽  
Yu Liang ◽  
Liu Yang ◽  
Jianwei Li ◽  
Dong Liang
Keyword(s):  
Type I ◽  
Type Ii ◽  
Nodal Lines

Spin–Orbit-Coupling-Induced Type-I/type-II Dirac Nodal-Line Metal in Nonsymmorphic CaSb2

2019 ◽  
Vol 88 (4) ◽  
pp. 044711 ◽  
Author(s):  
Kohei Funada ◽  
Ai Yamakage ◽  
Naoya Yamashina ◽  
Hiroshi Kageyama
Keyword(s):  
Nodal Line ◽  
Orbit Coupling ◽  
Type I ◽  
Spin Orbit Coupling ◽  
Type Ii ◽  
Spin Orbit

scholarly journals Various Nodal Lines in P63/mmc-type TiTe Topological Metal and its (001) Surface State

2021 ◽  
Vol 9 ◽  
Author(s):  
Peng Lin ◽  
Fang Fang ◽  
Li Zhang ◽  
Yang Li ◽  
Kai Wang
Keyword(s):  
Surface States ◽  
Strain Engineering ◽  
Nodal Line ◽  
Type I ◽  
Chemical Doping ◽  
Spin Orbit Coupling ◽  
Nodal Lines ◽  
Hybrid Type ◽  
Two Hybrid ◽  
Topological Metal

Searching for existing topological materials is a hot topic in quantum and computational chemistry. This study uncovers P63/mmc type TiTe compound—an existing material—is a newly discovered topological metal that hosts the various type of nodal line states. Different nodal line states normally exhibit different properties; they may have their individual applications. We report that TiTe hosts I, II, and hybrid type nodal line (NL) states at its ground state without chemical doping and strain engineering effects. Specifically, two type I NLs, two hybrid-type NLs, and one Γ—centered type II NL can be found in the kz = 0 plane. Moreover, the spin-orbit coupling induced gaps for these NLs are very small and within acceptable limits. The surface states of the TiTe (001) plane were determined to provide strong evidence for the appearance of the three types of NLs in TiTe. We also provide a reference for the data of the dynamic and mechanical properties of TiTe. We expect that the proposed NL states in TiTe can be obtained in future experiments.

Intermetallic α-FeSi2: Realization of Type-I, Type-II, and Hybrid Nodal Line States in a Single Material via Tunable Valleys

2020 ◽  
Vol 124 (23) ◽  
pp. 12311-12317
Author(s):  
Lei Jin ◽  
Xiaoming Zhang ◽  
Tingli He ◽  
Weizhen Meng ◽  
Xuefang Dai ◽  
...  
Keyword(s):  
Nodal Line ◽  
Type I ◽  
Type Ii ◽  
Single Material

scholarly journals Type-I and type-II nodal lines coexistence in the antiferromagnetic monolayer CrAs2

2018 ◽  
Vol 98 (11) ◽  
Author(s):  
Busheng Wang ◽  
Heng Gao ◽  
Qing Lu ◽  
WenHui Xie ◽  
Yanfeng Ge ◽  
...  
Keyword(s):  
Type I ◽  
Type Ii ◽  
Nodal Lines

Heat-Etching with a Bullivant Type II Simple Freeze-Cleave Device

1970 ◽  
Vol 28 ◽  
pp. 106-107 ◽  
Author(s):  
Ronald S. Weinstein ◽  
N. Scott McNutt
Keyword(s):  
New Zealand ◽  
General Hospital ◽  
Massachusetts General Hospital ◽  
Type I ◽  
Type Ii ◽  
Collaborative Effort ◽  
Temperature And Pressure ◽  
The University

The Type I simple cold block device was described by Bullivant and Ames in 1966 and represented the product of the first successful effort to simplify the equipment required to do sophisticated freeze-cleave techniques. Bullivant, Weinstein and Someda described the Type II device which is a modification of the Type I device and was developed as a collaborative effort at the Massachusetts General Hospital and the University of Auckland, New Zealand. The modifications reduced specimen contamination and provided controlled specimen warming for heat-etching of fracture faces. We have now tested the Mass. General Hospital version of the Type II device (called the “Type II-MGH device”) on a wide variety of biological specimens and have established temperature and pressure curves for routine heat-etching with the device.

Labelling of non-A, non-B hepatitis infected chimpanzee hepatocytes with nuclease-gold conjugates

1984 ◽  
Vol 42 ◽  
pp. 250-251
Author(s):  
G. D. Gagne ◽  
M. F. Miller ◽  
D. A. Peterson
Keyword(s):  
Endoplasmic Reticulum ◽  
Experimental Infection ◽  
Uranyl Acetate ◽  
Type I ◽  
Cellular Injury ◽  
Type Ii ◽  
Tubular Structures ◽  
Type Iii ◽  
Type Iv ◽  
Infected Chimpanzee

Experimental infection of chimpanzees with non-A, non-B hepatitis (NANB) or with delta agent hepatitis results in the appearance of characteristic cytoplasmic alterations in the hepatocytes. These alterations include spongelike inclusions (Type I), attached convoluted membranes (Type II), tubular structures (Type III), and microtubular aggregates (Type IV) (Fig. 1). Type I, II and III structures are, by association, believed to be derived from endoplasmic reticulum and may be morphogenetically related. Type IV structures are generally observed free in the cytoplasm but sometimes in the vicinity of type III structures. It is not known whether these structures are somehow involved in the replication and/or assembly of the putative NANB virus or whether they are simply nonspecific responses to cellular injury. When treated with uranyl acetate, type I, II and III structures stain intensely as if they might contain nucleic acids. If these structures do correspond to intermediates in the replication of a virus, one might expect them to contain DNA or RNA and the present study was undertaken to explore this possibility.

Comparative surface and ultrastructural views of methylotrophic bacteria by TEM, STEM, SE, and freeze-etch electron microscopy.

1987 ◽  
Vol 45 ◽  
pp. 792-793
Author(s):  
T.A. Fassel ◽  
M.J. Schaller ◽  
M.E. Lidstrom ◽  
C.C. Remsen
Keyword(s):  
Cytoplasmic Membrane ◽  
Structural Features ◽  
Methylotrophic Bacteria ◽  
Type I ◽  
Type Ii ◽  
Membrane Complex ◽  
Oxidation Of Methane ◽  
Methane Oxidizing Bacteria ◽  
Wall Structures ◽  
Methylomonas Albus

Methylotrophic bacteria play an Important role in the environment in the oxidation of methane and methanol. Extensive intracytoplasmic membranes (ICM) have been associated with the oxidation processes in methylotrophs and chemolithotrophic bacteria. Classification on the basis of ICM arrangement distinguishes 2 types of methylotrophs. Bundles or vesicular stacks of ICM located away from the cytoplasmic membrane and extending into the cytoplasm are present in Type I methylotrophs. In Type II methylotrophs, the ICM form pairs of peripheral membranes located parallel to the cytoplasmic membrane. Complex cell wall structures of tightly packed cup-shaped subunits have been described in strains of marine and freshwater phototrophic sulfur bacteria and several strains of methane oxidizing bacteria. We examined the ultrastructure of the methylotrophs with particular view of the ICM and surface structural features, between representatives of the Type I Methylomonas albus (BG8), and Type II Methylosinus trichosporium (OB-36).

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