PMID- 33591761
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20210225
IS  - 1948-7185 (Electronic)
IS  - 1948-7185 (Linking)
VI  - 12
IP  - 7
DP  - 2021 Feb 25
TI  - Tunable Rashba Spin Splitting in Two-Dimensional Polar Perovskites.
PG  - 1932-1939
LID - 10.1021/acs.jpclett.0c03668 [doi]
AB  - Two-dimensional (2D) Rashba semiconductors with structure inversion asymmetry and 
      a spin-orbit coupling (SOC) effect show promising applications in 
      nanospintronics, such as spin field effect transistors (FETs). Here, we 
      systematically investigate the electronic structures and Rashba effect of 2D 
      polar perovskites ABX(3) (A = Cs(+) or Rb(+); B = Pb(2+) or Sn(2+); X = Cl, Br, 
      or I) by first-principles density functional theory calculations. We demonstrate 
      that, except for the cubic case, 2D polar perovskites from tetragonal and 
      orthorhombic three-dimensional (3D) bulks exhibit a strong intrinsic Rashba 
      effect around the Gamma point, due to their structure inversion asymmetry and the 
      strong SOC effect of heavy atoms. In particular, 2D orthorhombic RbSnI(3) shows 
      the largest Rashba constant of 1.176 eV A among these polar perovskites, which is 
      comparable to that of 3D bulk perovskites previously reported in experiments and 
      theory. Furthermore, several 2D polar perovskites also show a strong electric 
      field response. In particular, 2D tetragonal RbPbI(3) and tetragonal CsPbI(3) 
      have strong electric field responses of >0.5 e A(2). Therefore, 2D polar 
      perovskites as promising Rashba semiconductors possess large Rashba constants and 
      strong electric field responses, resulting in a short spin channel length of tens 
      of nanometers to preserve the spin coherence in spin FETs, superior to 
      conventional 3D micrometer spin FETs.
FAU - Chen, Jiajia
AU  - Chen J
AUID- ORCID: 0000-0001-5182-0904
AD  - Hefei National Laboratory for Physical Sciences at the Microscale, Department of 
      Chemical Physics, and Synergetic Innovation Center of Quantum Information and 
      Quantum Physics, University of Science and Technology of China, Hefei, Anhui 
      230026, China.
FAU - Wu, Kai
AU  - Wu K
AUID- ORCID: 0000-0003-4321-7819
AD  - Hefei National Laboratory for Physical Sciences at the Microscale, Department of 
      Chemical Physics, and Synergetic Innovation Center of Quantum Information and 
      Quantum Physics, University of Science and Technology of China, Hefei, Anhui 
      230026, China.
FAU - Hu, Wei
AU  - Hu W
AUID- ORCID: 0000-0001-9629-2121
AD  - Hefei National Laboratory for Physical Sciences at the Microscale, Department of 
      Chemical Physics, and Synergetic Innovation Center of Quantum Information and 
      Quantum Physics, University of Science and Technology of China, Hefei, Anhui 
      230026, China.
FAU - Yang, Jinlong
AU  - Yang J
AUID- ORCID: 0000-0002-5651-5340
AD  - Hefei National Laboratory for Physical Sciences at the Microscale, Department of 
      Chemical Physics, and Synergetic Innovation Center of Quantum Information and 
      Quantum Physics, University of Science and Technology of China, Hefei, Anhui 
      230026, China.
LA  - eng
PT  - Journal Article
DEP - 20210216
PL  - United States
TA  - J Phys Chem Lett
JT  - The journal of physical chemistry letters
JID - 101526034
SB  - IM
EDAT- 2021/02/17 06:00
MHDA- 2021/02/17 06:01
CRDT- 2021/02/16 17:09
PHST- 2021/02/17 06:00 [pubmed]
PHST- 2021/02/17 06:01 [medline]
PHST- 2021/02/16 17:09 [entrez]
AID - 10.1021/acs.jpclett.0c03668 [doi]
PST - ppublish
SO  - J Phys Chem Lett. 2021 Feb 25;12(7):1932-1939. doi: 10.1021/acs.jpclett.0c03668. 
      Epub 2021 Feb 16.