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.

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

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.

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

Complex Acid-Base Disorders in Subacute Necrotizing Encephalomyelopathy (Leigh's Syndrome)

PEDIATRICS ◽  
1978 ◽  
Vol 61 (2) ◽  
pp. 278-281
Author(s):  
Gladys H. Hirschman ◽  
James C. M. Chan
Keyword(s):  
Metabolic Acidosis ◽  
Clinical Data ◽  
Renal Tubular Acidosis ◽  
Respiratory Alkalosis ◽  
Type I ◽  
Type Ii ◽  
Acid Base ◽  
Hybrid Type ◽  
Leigh’S Syndrome ◽  
Renal Tubular

This report describes a case of subacute necrotizing encephalomyelopathy (Leigh's syndrome) in a 7-month-old boy. The clinical data suggest an association with a disorder of renal tubular acidification, characterized by both (proximal) type II and (distal) type I renal tubular acidosis (hybrid type). Concomitantly, the initial uncompensated metabolic acidosis evolved into a mixed metabolic acidosis and respiratory alkalosis-features of this syndrome not previously reported.

Coexistence of open and closed type nodal line topological semimetals in two dimensional B2C

2018 ◽  
Vol 6 (5) ◽  
pp. 1206-1214 ◽  
Author(s):  
P. Zhou ◽  
Z. S. Ma ◽  
L. Z. Sun
Keyword(s):  
Nodal Line ◽  
Two Dimensional ◽  
Nodal Lines ◽  
Closed Type ◽  
Topological Semimetal ◽  
Topological Semimetals

The detection of open and closed type nodal lines in the bilayer topological semimetal B2C on the substrate of Cu(110).

scholarly journals Early outcomes of hybrid type II arch repair versus total arch replacement with frozen elephant trunk in acute DeBakey type I aortic dissection: a propensity score-matched analysis

2020 ◽  
Vol 31 (4) ◽  
pp. 565-572
Author(s):  
Yanxiang Liu ◽  
Shenghua Liang ◽  
Bowen Zhang ◽  
Yunfeng Li ◽  
Lucheng Wang ◽  
...  
Keyword(s):  
Propensity Score ◽  
Aortic Dissection ◽  
Protective Factor ◽  
Total Arch Replacement ◽  
Type I ◽  
Type Ii ◽  
Frozen Elephant Trunk ◽  
Elephant Trunk ◽  
Low Cardiac Output Syndrome ◽  
Hybrid Type

Abstract OBJECTIVES The aim was to evaluate the short-term outcomes of hybrid type II arch repair (HAR) and total arch replacement with frozen elephant trunk (TAR with FET) for acute DeBakey type I aortic dissection patients. METHODS From January 2017 to June 2019, the clinical data of acute DeBakey type I aortic dissection patients in a single centre were retrospectively reviewed; there were 92 cases of HAR and 268 cases of TAR with FET, with 56 pairs by propensity score matching. RESULTS After matching, the composite end points including 30-day mortality, stroke, paraplegia, renal failure, hepatic failure, reintubation or tracheotomy and low cardiac output syndrome were comparable (21.4%, 12/56 in the HAR group vs 21.4%, 12/56 in the TAR with FET group, P = 1.000). The rate of acute kidney injury (AKI) was significantly lower in the HAR group (58.9%, 33/56 vs 80.4%, 45/56, P = 0.031). The distribution of AKI stage according to the Kidney Disease Improving Global Outcomes criteria was different (P = 0.039), with more patients suffering from high-grade AKI in the TAR with FET group. Multivariable logistic analysis showed that the procedure type (HAR or TAR with FET) was not an independent predictor of composite adverse events or stroke. HAR was identified as a protective factor against AKI (odds ratio 0.485, 95% confidence interval 0.287–0.822; P = 0.007). CONCLUSIONS In the treatment of acute DeBakey type I aortic dissection, no significant differences were found in early outcomes between the 2 groups, but HAR was associated with a significantly lower incidence of AKI.

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