Unusual Mott transition in multiferroic PbCrO 3
Abstract
The Mott insulator in correlated electron systems arises from classical Coulomb repulsion between carriers to provide a powerful force for electron localization. Turning such an insulator into a metal, the so-called Mott transition, is commonly achieved by “bandwidth control or “band filling.” However, both mechanisms deviate fro the original concept of Mott, which attributes such a transition t the screening of Coulomb potential and associated lattice contraction Here, we report a pressure-induced isostructural Mott transition in cubic perovskite PbCrO3. At the transition pressure of ~3 GPa, PbCrO3 exhibits significant collapse in both lattice volum and Coulomb potential. Concurrent with the collapse, it transform from a hybrid multiferroic insulator to a metal. For the first time t our knowledge, these findings validate the scenario conceived b Mott. Close to the Mott criticality at ~300 K, fluctuations of the lattice and charge give rise to elastic anomalies and Laudau critical behaviors resembling the classic liquid–gas transition. In conclusion, the anomalously large lattice volume and Coulomb potential in the low-pressure insulating phase are largely associated with the ferroelectric distortion, which is substantially suppressed at high pressures, leading to the first-order phase transition without symmetry breaking.
- Authors:
-
- Sichuan Univ., Chengdu (China); Univ. of Nevada, Las Vegas, NV (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of Nevada, Las Vegas, NV (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Chinese Academy of Sciences (CAS), Beijing (China)
- Univ. of Nevada, Las Vegas, NV (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Chinese Academy of Sciences (CAS), Beijing (China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sichuan Univ., Chengdu (China)
- Univ. of Nevada, Las Vegas, NV (United States); Carnegie Inst. of Washington, Argonne, IL (United States)
- US Synthetic Corporation, Orem, UT (United States)
- Univ. of Florida, Gainesville, FL (United States)
- Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
- Univ. of Nevada, Las Vegas, NV (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of Nevada, Las Vegas, NV (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1261490
- Alternate Identifier(s):
- OSTI ID: 1332356
- Grant/Contract Number:
- AC05-00OR22725; FC52-06NA27684; 2011CB808205; NA0001974; FG02-99ER45775; AC02-06CH11357; AC52-06NA25396; NA0001982
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Proceedings of the National Academy of Sciences of the United States of America
- Additional Journal Information:
- Journal Volume: 112; Journal Issue: 50; Journal ID: ISSN 0027-8424
- Publisher:
- National Academy of Sciences, Washington, DC (United States)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Mott transition; multiferroics; PbCrO3; Mott criticality; isostructural transition; HIGH-PRESSURE; ELECTRONIC-STRUCTURE; VOLUME COLLAPSE; METAL OXIDES; PEROVSKITE; ANTIFERROMAGNETISM; PHOTOEMISSION
Citation Formats
Wang, Shanmin, Zhu, Jinlong, Zhang, Yi, Yu, Xiaohui, Zhang, Jianzhong, Wang, Wendan, Bai, Ligang, Qian, Jiang, Yin, Liang, Sullivan, Neil S., Jin, Changqing, He, Duanwei, Xu, Jian, and Zhao, Yusheng. Unusual Mott transition in multiferroic PbCrO 3. United States: N. p., 2015.
Web. doi:10.1073/pnas.1510415112.
Wang, Shanmin, Zhu, Jinlong, Zhang, Yi, Yu, Xiaohui, Zhang, Jianzhong, Wang, Wendan, Bai, Ligang, Qian, Jiang, Yin, Liang, Sullivan, Neil S., Jin, Changqing, He, Duanwei, Xu, Jian, & Zhao, Yusheng. Unusual Mott transition in multiferroic PbCrO 3. United States. https://doi.org/10.1073/pnas.1510415112
Wang, Shanmin, Zhu, Jinlong, Zhang, Yi, Yu, Xiaohui, Zhang, Jianzhong, Wang, Wendan, Bai, Ligang, Qian, Jiang, Yin, Liang, Sullivan, Neil S., Jin, Changqing, He, Duanwei, Xu, Jian, and Zhao, Yusheng. Tue .
"Unusual Mott transition in multiferroic PbCrO 3". United States. https://doi.org/10.1073/pnas.1510415112. https://www.osti.gov/servlets/purl/1261490.
@article{osti_1261490,
title = {Unusual Mott transition in multiferroic PbCrO 3},
author = {Wang, Shanmin and Zhu, Jinlong and Zhang, Yi and Yu, Xiaohui and Zhang, Jianzhong and Wang, Wendan and Bai, Ligang and Qian, Jiang and Yin, Liang and Sullivan, Neil S. and Jin, Changqing and He, Duanwei and Xu, Jian and Zhao, Yusheng},
abstractNote = {The Mott insulator in correlated electron systems arises from classical Coulomb repulsion between carriers to provide a powerful force for electron localization. Turning such an insulator into a metal, the so-called Mott transition, is commonly achieved by “bandwidth control or “band filling.” However, both mechanisms deviate fro the original concept of Mott, which attributes such a transition t the screening of Coulomb potential and associated lattice contraction Here, we report a pressure-induced isostructural Mott transition in cubic perovskite PbCrO3. At the transition pressure of ~3 GPa, PbCrO3 exhibits significant collapse in both lattice volum and Coulomb potential. Concurrent with the collapse, it transform from a hybrid multiferroic insulator to a metal. For the first time t our knowledge, these findings validate the scenario conceived b Mott. Close to the Mott criticality at ~300 K, fluctuations of the lattice and charge give rise to elastic anomalies and Laudau critical behaviors resembling the classic liquid–gas transition. In conclusion, the anomalously large lattice volume and Coulomb potential in the low-pressure insulating phase are largely associated with the ferroelectric distortion, which is substantially suppressed at high pressures, leading to the first-order phase transition without symmetry breaking.},
doi = {10.1073/pnas.1510415112},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 50,
volume = 112,
place = {United States},
year = {Tue Nov 24 00:00:00 EST 2015},
month = {Tue Nov 24 00:00:00 EST 2015}
}
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