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Martínez-Blanco J, Joco V, Quirós C, Segovia P, Michel EG. Crystalline Structure and Vacancy Ordering across a Surface Phase Transition in Sn/Cu(001). J Phys Chem B 2018; 122:745-756. [PMID: 28885023 DOI: 10.1021/acs.jpcb.7b06398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a surface X-ray diffraction study of the crystalline structure changes and critical behavior across the (3√2 × √2)R45° → (√2 × √2)R45° surface phase transition at 360 K for 0.5 monolayers of Sn on Cu(100). The phase transition is of the order-disorder type and is due to the disordering of the Cu atomic vacancies present in the low temperature phase. Two different atomic sites for Sn atoms, characterized by two different heights, are maintained across the surface phase transition.
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Affiliation(s)
- J Martínez-Blanco
- Departamento de Fı́sica de la Materia Condensada, Universidad Autónoma de Madrid , 28049, Madrid, Spain
| | - V Joco
- Departamento de Fı́sica de la Materia Condensada, Universidad Autónoma de Madrid , 28049, Madrid, Spain
| | - C Quirós
- Departamento de Fı́sica, Universidad de Oviedo , 33007 Oviedo, Spain.,Centro de Investigación en Nanomateriales y Nanotecnologı́a, CINN (CSIC - Universidad de Oviedo) , 33940 El Entrego, Spain
| | - P Segovia
- Departamento de Fı́sica de la Materia Condensada, Universidad Autónoma de Madrid , 28049, Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid , 28049 Madrid, Spain.,Instituto Universitario de Ciencia de Materiales "Nicolás Cabrera", Universidad Autónoma de Madrid , 28049 Madrid, Spain
| | - E G Michel
- Departamento de Fı́sica de la Materia Condensada, Universidad Autónoma de Madrid , 28049, Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid , 28049 Madrid, Spain.,Instituto Universitario de Ciencia de Materiales "Nicolás Cabrera", Universidad Autónoma de Madrid , 28049 Madrid, Spain
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González C, Biel B, Dappe YJ. Adsorption of small inorganic molecules on a defective MoS2monolayer. Phys Chem Chem Phys 2017; 19:9485-9499. [DOI: 10.1039/c7cp00544j] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Different molecules physisorbed, chemisorbed or dissociated on a defective MoS2layer.
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Affiliation(s)
- César González
- Departamento de Electrónica y Tecnología de Computadores
- Campus de Fuente Nueva & CITIC
- Universidad de Granada
- E-18071 Granada
- Spain
| | - Blanca Biel
- Departamento de Electrónica y Tecnología de Computadores
- Campus de Fuente Nueva & CITIC
- Universidad de Granada
- E-18071 Granada
- Spain
| | - Yannick J. Dappe
- SPEC
- CEA
- CNRS
- Université Paris-Saclay
- CEA Saclay 91191 Gif-sur-Yvette Cedex
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Zhang H, Ming F, Kim HJ, Zhu H, Zhang Q, Weitering HH, Xiao X, Zeng C, Cho JH, Zhang Z. Stabilization and manipulation of electronically phase-separated ground states in defective indium atom wires on silicon. PHYSICAL REVIEW LETTERS 2014; 113:196802. [PMID: 25415916 DOI: 10.1103/physrevlett.113.196802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2014] [Indexed: 06/04/2023]
Abstract
Exploration and manipulation of electronic states in low-dimensional systems are of great importance in the fundamental and practical aspects of nanomaterial and nanotechnology. Here, we demonstrate that the incorporation of vacancy defects into monatomic indium wires on n-type Si(111) can stabilize electronically phase-separated ground states where the insulating 8×2 and metallic 4×1 phases coexist. Furthermore, the areal ratio of the two phases in the phase-separated states can be tuned reversibly by electric field or charge doping, and such tunabilities can be quantitatively captured by first principles-based modeling and simulations. The present results extend the realm of electronic phase separation from strongly correlated d-electron materials typically in bulk form to weakly interacting sp-electron systems in reduced dimensionality.
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Affiliation(s)
- Hui Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale (HFNL) and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Fangfei Ming
- Department of Physics, The Chinese University of Hong Kong, Shatin, New Territory, Hong Kong, China
| | - Hyun-Jung Kim
- Department of Physics, Hanyang University, 17 Haengdang-Dong, SeongDong-Ku, Seoul 133-791, Korea
| | - Hongbin Zhu
- Hefei National Laboratory for Physical Sciences at the Microscale (HFNL) and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Qiang Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale (HFNL) and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Hanno H Weitering
- Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, USA and Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Xudong Xiao
- Department of Physics, The Chinese University of Hong Kong, Shatin, New Territory, Hong Kong, China and Shenzhen Institute of Advanced Technology, Chinese Academy of Science, Shenzhen 518055, China
| | - Changgan Zeng
- Hefei National Laboratory for Physical Sciences at the Microscale (HFNL) and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China and International Center for Quantum Design of Functional Materials (ICQD), HFNL, University of Science and Technology of China, Hefei, Anhui 230026, China and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jun-Hyung Cho
- Department of Physics, Hanyang University, 17 Haengdang-Dong, SeongDong-Ku, Seoul 133-791, Korea
| | - Zhenyu Zhang
- International Center for Quantum Design of Functional Materials (ICQD), HFNL, University of Science and Technology of China, Hefei, Anhui 230026, China and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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