Controllable Modulation to Quantum Well States on β-Sn Islands  

作　　者：Ze-Rui Wang Chen-Xiao Zhao Guan-Yong Wang Jin Qin Bing Xia Bo Yang Dan-dan Guan Shi-Yong Wang Hao Zheng Yao-Yi Li Can-hua Liu Jin-Feng Jia 王泽睿;赵晨晓;王观勇;秦晋;夏冰;杨波;管丹丹;王世勇;郑浩;李耀义;刘灿华;贾金锋(Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education),School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China;Tsung-Dao Lee Institute,Shanghai 200240,China)

机构地区：[1]Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education),School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China [2]Tsung-Dao Lee Institute,Shanghai 200240,China

出　　处：《Chinese Physics Letters》2020年第9期42-45,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.11521404,11634009,11674222,11674226,11790313,11574202,11874256,U1632102,11861161003 and 11874258);the National Key Research and Development Program of China(Grant Nos.2016YFA0300403 and 2016YFA0301003);the Key Research Program of the Chinese Academy of Sciences(Grant No.XDPB08-2);the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB28000000);the Shanghai Municipal Science and Technology Major Project(Grant No.2019SHZDZX01)。

摘　　要：We investigate the surface structure and electronic properties ofβ-Sn islands deposited on a graphitized 6 H-SiC(0001)substrate via low temperature scanning tunneling microscopy and spectroscopy.Owing to the confinement of the island geometry,quantum well states(QWSs)are formed,manifesting as equidistant peaks in the tunneling spectra.Furthermore,a distinct strip feature appears on the surfaces of odd-layer Sn islands,ranging from 15-19 layers,which is not present on the surfaces of even-layer Sn islands.The spatial distribution of strips can be modified by applying a bias pulse,using an STM tip.Furthermore,the strip-like structure shows significant impacts on the QWS.An energy splitting of the lowest unoccupied QWSs is observed in strip regions;this may be ascribed to caused the phase shift of the wave functions of the QWSs on the top surface,due to surface distortions created by the aforementioned strips.

关 键 词：STRIP TUNNELING surface 

分 类 号：O413[理学—理论物理]