Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Dynamic short-range correlation in photoinduced disorder phase transitions

Journal Article · · Physical Review. B
 [1];  [1];  [1];  [2]
  1. Chinese Academy of Sciences (CAS), Beijing (China); University of Chinese Academy of Sciences, Beijing (China)
  2. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Materials Sciences Division
Ultrafast photoexcitation can induce a nonequilibrium dynamic with electron-lattice interaction, offering an effective way to study photoinduced phase transitions (PIPTs) in solids. The issue that atomic displacements after photoexcitation belong to a coherent change or disordered process has become controversial in the PIPT community. Using real-time, time-dependent density functional theory (rt-TDDFT) simulations, we were able to obtained both the coherent and the disordered PIPTs (dimer dissociation) in IrTe2 with different electronic occupations. More importantly, we found that in the disordered phase transition there exists a local correlation between different dimers regarding their dissociation status. We define these Ir-Ir dimers directly connected by Te atoms, including intralayer and vertically across the layers, as a group (group I). Other Ir-Ir dimers separated by five Ir atoms from Ir-Ir dimers in group I are divided into another group (group II). The dimers in the same group will dissociate in a correlated fashion; they either all dissociate or all do not dissociate. On the other hand, the dimers in neighboring groups will have an anticorrelation: If the dimers in one group dissociate, the dimers in the neighboring group tend not to be dissociated, and vice versa.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
Chinese Academy of Sciences (CAS); National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1969650
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 22 Vol. 105; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (32)

Algorithm advances and applications of time‐dependent first‐principles simulations for ultrafast dynamics journal October 2021
The analysis of a plane wave pseudopotential density functional theory code on a GPU machine journal January 2013
Electronic acceleration of atomic motions and disordering in bismuth journal March 2009
Optically excited structural transition in atomic wires on surfaces at the quantum limit journal March 2017
Time-domain classification of charge-density-wave insulators journal January 2012
Ultrafast transient generation of spin-density-wave order in the normal state of BaFe2As2 driven by coherent lattice vibrations journal April 2012
The critical role of hot carrier cooling in optically excited structural transitions journal July 2021
Evidence for topological defects in a photoinduced phase transition journal October 2018
Light-induced charge density wave in LaTe3 journal November 2019
Probing dynamics in quantum materials with femtosecond X-rays journal June 2018
An ultrafast symmetry switch in a Weyl semimetal journal January 2019
Coherent control of a surface structural phase transition journal July 2020
Impurity diffusion induced dynamic electron donors in semiconductors journal October 2019
Microscopic force driving the photoinduced ultrafast phase transition: Time-dependent density functional theory simulations of IrTe 2 journal November 2020
Optimized norm-conserving Vanderbilt pseudopotentials journal August 2013
Robustness of the charge-ordered phases in IrTe 2 against photoexcitation journal February 2018
Dimerization-Induced Cross-Layer Quasi-Two-Dimensionality in Metallic IrTe 2 journal February 2014
Efficient Real-Time Time-Dependent Density Functional Theory Method and its Application to a Collision of an Ion with a 2D Material journal February 2015
Origin of First-Order-Type Electronic and Structural Transitions in IrTe 2 journal March 2015
Directional Forces by Momentumless Excitation and Order-to-Order Transition in Peierls-Distorted Solids: The Case of GeTe journal May 2018
Dynamical Slowing-Down in an Ultrafast Photoinduced Phase Transition journal August 2019
Bypassing the Structural Bottleneck in the Ultrafast Melting of Electronic Order journal December 2020
Real-Time Observation of a Coherent Lattice Transformation into a High-Symmetry Phase journal September 2018
Ultrafast dissolution and creation of bonds in IrTe 2 induced by photodoping journal July 2018
Ultrafast electron calorimetry uncovers a new long-lived metastable state in 1 T -TaSe 2 mediated by mode-selective electron-phonon coupling journal March 2019
A photoinduced metal-like phase of monoclinic VO 2 revealed by ultrafast electron diffraction journal October 2014
Direct observation of collective modes coupled to molecular orbital-driven charge transfer journal December 2015
Femtosecond electron-phonon lock-in by photoemission and x-ray free-electron laser journal July 2017
Beyond the molecular movie: Dynamics of bands and bonds during a photoinduced phase transition journal November 2018
Ultrafast disordering of vanadium dimers in photoexcited VO 2 journal November 2018
Disorder at the border journal November 2018
Switching of Conducting Planes by Partial Dimer Formation in IrTe 2 journal March 2014

Similar Records

Unifying the order and disorder dynamics in photoexcited VO2
Journal Article · Tue Jul 05 20:00:00 EDT 2022 · Proceedings of the National Academy of Sciences of the United States of America · OSTI ID:1905256

The critical role of hot carrier cooling in optically excited structural transitions
Journal Article · Wed Jul 21 20:00:00 EDT 2021 · npj Computational Materials · OSTI ID:1820338

Microscopic force driving the photoinduced ultrafast phase transition: Time-dependent density functional theory simulations of IrTe2
Journal Article · Sun Nov 29 19:00:00 EST 2020 · Physical Review B · OSTI ID:1823405