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Title: Probing the pathway of an ultrafast structural phase transition to illuminate the transition mechanism in Cu 2S

Disentangling the primary order parameter from secondary order parameters in phase transitions is critical to the interpretation of transition mechanisms in strongly correlated systems and quantum materials. Here in this work, we present a study of structural phase transition pathways in superionic Cu 2S nanocrystals that exhibit intriguing properties. Utilizing ultrafast electron diffraction techniques sensitive to both the momentum-space and the time-domain, we distinguish the dynamics of crystal symmetry breaking and lattice expansion in this system. We are able to follow the transient states along the transition pathway, and so observe the dynamics of both the primary and secondary order parameters. Based on these observations, we argue that the mechanism of structural phase transition in Cu 2S is dominated by the electron-phonon coupling. Lastly, this mechanism advances the understanding from previous results, where the focus was solely on dynamic observations of the lattice expansion.
Authors:
ORCiD logo [1] ;  [2] ;  [1] ;  [1] ;  [1] ; ORCiD logo [1] ; ORCiD logo [3] ;  [4] ;  [5] ;  [5] ;  [5] ;  [5] ;  [5] ;  [6] ;  [6] ; ORCiD logo [6] ;  [1] ;  [7] ;  [1] ;  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Department
  2. Univ. of Michigan, Ann Arbor, MI (United States). Department of Physics
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
  4. American Physical Society, Ridge, NY (United States)
  5. Brookhaven National Lab. (BNL), Upton, NY (United States). Accelerator Test Facility
  6. Univ. of Arkansas, Fayetteville, AR (United States). Department of Chemistry and Biochemistry
  7. Princeton Univ., NJ (United States). Department of Chemistry
Publication Date:
Report Number(s):
BNL-209066-2018-JAAM
Journal ID: ISSN 0003-6951
Grant/Contract Number:
SC0012704; FG02-98ER45706
Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 113; Journal Issue: 4; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1473656
Alternate Identifier(s):
OSTI ID: 1461568

Li, Junjie, Sun, Kai, Li, Jun, Meng, Qingping, Fu, Xuewen, Yin, Wei-Guo, Lu, Deyu, Li, Yan, Babzien, Marcus, Fedurin, Mikhail, Swinson, Christina, Malone, Robert, Palmer, Mark, Mathurin, Leanne, Manso, Ryan, Chen, Jingyi, Konik, Robert M., Cava, Robert J., Zhu, Yimei, and Tao, Jing. Probing the pathway of an ultrafast structural phase transition to illuminate the transition mechanism in Cu2S. United States: N. p., Web. doi:10.1063/1.5032132.
Li, Junjie, Sun, Kai, Li, Jun, Meng, Qingping, Fu, Xuewen, Yin, Wei-Guo, Lu, Deyu, Li, Yan, Babzien, Marcus, Fedurin, Mikhail, Swinson, Christina, Malone, Robert, Palmer, Mark, Mathurin, Leanne, Manso, Ryan, Chen, Jingyi, Konik, Robert M., Cava, Robert J., Zhu, Yimei, & Tao, Jing. Probing the pathway of an ultrafast structural phase transition to illuminate the transition mechanism in Cu2S. United States. doi:10.1063/1.5032132.
Li, Junjie, Sun, Kai, Li, Jun, Meng, Qingping, Fu, Xuewen, Yin, Wei-Guo, Lu, Deyu, Li, Yan, Babzien, Marcus, Fedurin, Mikhail, Swinson, Christina, Malone, Robert, Palmer, Mark, Mathurin, Leanne, Manso, Ryan, Chen, Jingyi, Konik, Robert M., Cava, Robert J., Zhu, Yimei, and Tao, Jing. 2018. "Probing the pathway of an ultrafast structural phase transition to illuminate the transition mechanism in Cu2S". United States. doi:10.1063/1.5032132.
@article{osti_1473656,
title = {Probing the pathway of an ultrafast structural phase transition to illuminate the transition mechanism in Cu2S},
author = {Li, Junjie and Sun, Kai and Li, Jun and Meng, Qingping and Fu, Xuewen and Yin, Wei-Guo and Lu, Deyu and Li, Yan and Babzien, Marcus and Fedurin, Mikhail and Swinson, Christina and Malone, Robert and Palmer, Mark and Mathurin, Leanne and Manso, Ryan and Chen, Jingyi and Konik, Robert M. and Cava, Robert J. and Zhu, Yimei and Tao, Jing},
abstractNote = {Disentangling the primary order parameter from secondary order parameters in phase transitions is critical to the interpretation of transition mechanisms in strongly correlated systems and quantum materials. Here in this work, we present a study of structural phase transition pathways in superionic Cu2S nanocrystals that exhibit intriguing properties. Utilizing ultrafast electron diffraction techniques sensitive to both the momentum-space and the time-domain, we distinguish the dynamics of crystal symmetry breaking and lattice expansion in this system. We are able to follow the transient states along the transition pathway, and so observe the dynamics of both the primary and secondary order parameters. Based on these observations, we argue that the mechanism of structural phase transition in Cu2S is dominated by the electron-phonon coupling. Lastly, this mechanism advances the understanding from previous results, where the focus was solely on dynamic observations of the lattice expansion.},
doi = {10.1063/1.5032132},
journal = {Applied Physics Letters},
number = 4,
volume = 113,
place = {United States},
year = {2018},
month = {7}
}

Works referenced in this record:

Copper ion liquid-like thermoelectrics
journal, March 2012
  • Liu, Huili; Shi, Xun; Xu, Fangfang
  • Nature Materials, Vol. 11, Issue 5, p. 422-425
  • DOI: 10.1038/nmat3273