共 50 条
Light-induced renormalization of the band structure of chiral tellurium
被引:0
|作者:
Gatti, G.
[1
]
Tancogne-Dejean, N.
[2
,3
]
Huebener, H.
[2
,3
]
De Giovannini, U.
[2
,3
,4
]
Dai, J.
[5
,6
,7
]
Polishchuk, S.
[6
,8
]
Bugnon, Ph.
[5
]
Frassetto, F.
[9
]
Poletto, L.
[9
]
Chergui, M.
[6
,8
]
Grioni, M.
[5
,6
]
Rubio, A.
[1
,2
,3
,10
,11
]
Puppin, M.
[6
,8
]
Crepaldi, A.
[1
,12
]
机构:
[1] Univ Geneva, Dept Quantum Matter Phys, CH-1211 Geneva, Switzerland
[2] Max Planck Inst Struct & Dynam Matter, Luruper Chaussee 149, D-22761 Hamburg, Germany
[3] Ctr Free Electron Laser Sci, Luruper Chaussee 149, D-22761 Hamburg, Germany
[4] Univ Palermo, Dipartimento Fis & Chim, Via Archirafi 36, I-90123 Palermo, Italy
[5] Ecole Polytech Fed Lausanne EPFL, Inst Phys, CH-1015 Lausanne, Switzerland
[6] Ecole Polytech Fed Lausanne EPFL, Lausanne Ctr Ultrafast Sci LACUS, CH-1015 Lausanne, Switzerland
[7] Alba Synchrotron Light Source, Barcelona 08290, Spain
[8] Ecole Polytech Fed Lausanne EPFL, ISIC, Lab Ultrafast Spect, CH-1015 Lausanne, Switzerland
[9] Natl Res Council Italy Inst Photon & Nanotechnol C, Via Trasea 7, I-35131 Padua, Italy
[10] Univ Basque Country, Dept Fis Mat, Nanobio Spect Grp, San Sebastian 20018, Spain
[11] Flatiron Inst, Ctr Computat Quantum Phys CCQ, 162 Fifth Ave, New York, NY 10010 USA
[12] Politecn Milan, Dipartimento Fis, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy
来源:
基金:
欧盟地平线“2020”;
瑞士国家科学基金会;
欧洲研究理事会;
关键词:
COHERENT-PHONON OSCILLATIONS;
OPTICAL-PROPERTIES;
DYNAMICS;
SPACE;
ABSORPTION;
PRESSURE;
PHASE;
SE;
D O I:
10.1103/PhysRevMaterials.8.125001
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
Chirality in tellurium arises from a Peierls distortion driven by strong electron-phonon coupling, making this material a unique candidate for observing a light-induced topological phase transition. Using time- and angle- resolved photoelectron spectroscopy (trARPES), we reveal that, upon near-infrared photoexcitation, the Peierls gap is modulated by displacively excited coherent phonons with A 1g symmetry as well as chiral-symmetry- breaking ELO ' modes. By comparison with state-of-the-art TDDFT + U calculations, we reveal the microscopic origin of the in-phase oscillations of band edges, owing to phonon-induced modulation of the effective Hubbard U term.
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页数:6
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