Evidence for a vestigial nematic state in the cuprate pseudogap phase
- Indian Institute of Space Science and Technology, Thiruvananthapuram (India); Cornell Univ., Ithaca, NY (United States)
- Cornell Univ., Ithaca, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Stanford Univ., CA (United States)
- Harvard Univ., Cambridge, MA (United States)
- Nanoelectronics Research Institute, Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki (Japan)
- Nanoelectronics Research Institute, Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki (Japan); Univ. of Tokyo (Japan)
- Cornell Univ., Ithaca, NY (United States)
- Max Planck Institute for Chemical Physics of Solids, Dresden (Germany)
- Univ. College Cork (Ireland); Univ. of Oxford (United Kingdom)
The CuO2 antiferromagnetic insulator is transformed by hole-doping into an exotic quantum fluid usually referred to as the pseudogap (PG) phase. Its defining characteristic is a strong suppression of the electronic density-of-states D(E) for energies |E| < Δ*, where Δ* is the PG energy. Unanticipated broken-symmetry phases have been detected by a wide variety of techniques in the PG regime, most significantly a finite-Q density-wave (DW) state and a Q = 0 nematic (NE) state. Sublattice-phase-resolved imaging of electronic structure allows the doping and energy dependence of these distinct broken-symmetry states to be visualized simultaneously. Using this approach, we show that even though their reported ordering temperatures TDW and TNE are unrelated to each other, both the DW and NE states always exhibit their maximum spectral intensity at the same energy, and using independent measurements that this is the PG energy Δ*. Moreover, no new energy-gap opening coincides with the appearance of the DW state (which should theoretically open an energy gap on the Fermi surface), while the observed PG opening coincides with the appearance of the NE state (which should theoretically be incapable of opening a Fermi-surface gap). Here, we demonstrate how this perplexing phenomenology of thermal transitions and energy-gap opening at the breaking of two highly distinct symmetries may be understood as the natural consequence of a vestigial nematic state within the pseudogap phase of Bi2Sr2CaCu2O8.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Cornell Univ., Ithaca, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704; AC02-98CH10886; SC0018946
- OSTI ID:
- 1546047
- Alternate ID(s):
- OSTI ID: 2322517
- Report Number(s):
- BNL-211919-2019-JAAM
- Journal Information:
- Proceedings of the National Academy of Sciences of the United States of America, Vol. 116, Issue 27; ISSN 0027-8424
- Publisher:
- National Academy of SciencesCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Strain-Induced Spin-Nematic State and Nematic Susceptibility Arising from 2 × 2 Fe Clusters in KFe 0.8 Ag 1.2 Te 2
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journal | December 2019 |
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