scholarly journals Ultrafast Relaxation Dynamics of Photo-excited Dirac Fermion in Three Dimensional Dirac Semimetal Cadmium Arsenide

2016 ◽  
Author(s):  
Wei Lu ◽  
Shaofeng Ge ◽  
Xuefeng liu ◽  
Hong Lu ◽  
Chaizhen Li ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Dirac Fermion ◽  
Relaxation Dynamics ◽  
Dirac Semimetal ◽  
Ultrafast Relaxation

scholarly journals Ultrafast relaxation dynamics of photoexcited Dirac fermions in the three-dimensional Dirac semimetalCd3As2

2017 ◽  
Vol 95 (2) ◽  
Author(s):  
Wei Lu ◽  
Shaofeng Ge ◽  
Xuefeng Liu ◽  
Hong Lu ◽  
Caizhen Li ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Dirac Fermions ◽  
Relaxation Dynamics ◽  
Ultrafast Relaxation

scholarly journals Orbit topology analyzed from π phase shift of magnetic quantum oscillations in three-dimensional Dirac semimetal

2021 ◽  
Vol 118 (29) ◽  
pp. e2023027118
Author(s):  
Sang-Eon Lee ◽  
Myeong-jun Oh ◽  
Sanghyun Ji ◽  
Jinsu Kim ◽  
Jin-Hyeon Jun ◽  
...  
Keyword(s):  
Phase Shift ◽  
Three Dimensional ◽  
Dirac Fermion ◽  
Quantum Oscillations ◽  
Dirac Semimetal ◽  
Single Orbit ◽  
Dirac Materials ◽  
Dirac Semimetals ◽  
Cyclotron Mass ◽  
Magnetic Quantum Oscillations

With the emergence of Dirac fermion physics in the field of condensed matter, magnetic quantum oscillations (MQOs) have been used to discern the topology of orbits in Dirac materials. However, many previous researchers have relied on the single-orbit Lifshitz–Kosevich (LK) formula, which overlooks the significant effect of degenerate orbits on MQOs. Since the single-orbit LK formula is valid for massless Dirac semimetals with small cyclotron masses, it is imperative to generalize the method applicable to a wide range of Dirac semimetals, whether massless or massive. This report demonstrates how spin-degenerate orbits affect the phases in MQOs of three-dimensional massive Dirac semimetal, NbSb2. With varying the direction of the magnetic field, an abrupt π phase shift is observed due to the interference between the spin-degenerate orbits. We investigate the effect of cyclotron mass on the π phase shift and verify its close relation to the phase from the Zeeman coupling. We find that the π phase shift occurs when the cyclotron mass is half of the electron mass, indicating the effective spin gyromagnetic ratio as gs = 2. Our approach is not only useful for analyzing MQOs of massless Dirac semimetals with a small cyclotron mass but also can be used for MQOs in massive Dirac materials with degenerate orbits, especially in topological materials with a sufficiently large cyclotron mass. Furthermore, this method provides a useful way to estimate the precise gs value of the material.

The effect of hydrogen bonds on the ultrafast relaxation dynamics of a BODIPY dimer

2021 ◽  
Vol 154 (8) ◽  
pp. 084201
Author(s):  
Elisa Fresch ◽  
Nicola Peruffo ◽  
Mariachiara Trapani ◽  
Massimiliano Cordaro ◽  
Giovanni Bella ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Relaxation Dynamics ◽  
Ultrafast Relaxation

Thickness-Controlled Three-Dimensional Dirac Semimetal for Scalable High-Performance Terahertz Optoelectronics

ACS Photonics ◽  
2021 ◽  
Author(s):  
Xiaomei Yao ◽  
Shengxi Zhang ◽  
Qiang Sun ◽  
Peizong Chen ◽  
Xutao Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
Three Dimensional ◽  
Dirac Semimetal

scholarly journals Evidence of Topological Surface State in Three-Dimensional Dirac Semimetal Cd3As2

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Hemian Yi ◽  
Zhijun Wang ◽  
Chaoyu Chen ◽  
Youguo Shi ◽  
Ya Feng ◽  
...  
Keyword(s):  
Surface State ◽  
Three Dimensional ◽  
Dirac Semimetal ◽  
Topological Surface ◽  
Topological Surface State

Ultrafast relaxation dynamics of amine-substituted bipyridyl ruthenium(ii) complexes

2017 ◽  
Vol 683 ◽  
pp. 322-328 ◽  
Author(s):  
Hongwei Song ◽  
Xian Wang ◽  
WenWen Yang ◽  
Guiying He ◽  
Zhuoran Kuang ◽  
...  
Keyword(s):  
Relaxation Dynamics ◽  
Ultrafast Relaxation

Tunable coherent perfect absorption in three-dimensional Dirac semimetal films

2021 ◽  
Vol 19 (8) ◽  
pp. 081601
Author(s):  
Jipeng Wu ◽  
Jie Tang ◽  
Rongzhou Zeng ◽  
Xiaoyu Dai ◽  
Yuanjiang Xiang
Keyword(s):  
Three Dimensional ◽  
Perfect Absorption ◽  
Dirac Semimetal ◽  
Coherent Perfect Absorption

Ultrafast relaxation investigated by Photoelectron Circular Dichroism : an isomeric comparison of Camphor and Fenchone

2021 ◽  
Author(s):  
Valérie Blanchet ◽  
Dominique Descamps ◽  
stephane Petit ◽  
Yann Mairesse ◽  
bernard Pons ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Imaging Technique ◽  
Velocity Map Imaging ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Pump Probe ◽  
Ultrafast Relaxation ◽  
Circular Dichroïsm ◽  
Isomeric Effects

We study isomeric effects using time resolved photoelectron circular dichroism (PECD). By a (1+1’)pump-probe ionisation with photoelectron collected by velocity map imaging technique, we compare relaxation dynamics from the 3s-Rydberg...

scholarly journals Ultrafast Relaxation Dynamics of Highly-excited States in N2Molecules Excited by Femtosecond XUV Pulses

2013 ◽  
Vol 41 ◽  
pp. 02004
Author(s):  
Matteo Lucchini ◽  
Kyung Seung Kim ◽  
Francesca Calegari ◽  
Freek Kelkensberg ◽  
Wing Kiu Siu ◽  
...  
Keyword(s):  
Excited States ◽  
Relaxation Dynamics ◽  
Ultrafast Relaxation
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