Anisotropies of the g-factor tensor and diamagnetic coefficient in crystal-phase quantum dots in InP nanowires  

作　　者：Shiyao Wu Kai Peng Sergio Battiato Valentina Zannier Andrea Bertoni Guido Goldoni Xin Xie Jingnan Yang Shan Xiao Chenjiang Qian Feilong Song Sibai Sun Jianchen Dang Yang Yu Fabio Beltram Lucia Sorba Ang Li Bei-bei Li Francesco Rossella Xiulai Xu 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing,100190,China [2]CAS Center for Excellence in Topological Quantum Computation and School of Physical Sciences,University of Chinese Academy of Sciences,Beijing,100049,China [3]Laboratorio NEST,Scuola Normale Superiore and Istituto Nanoscienze-CNR,Piazza S.Silvestro 12,I-56127,Pisa,Italy [4]S3,Istituto Nanoscienze-CNR,Via Campi 213/a,Modena,41125,Italy [5]Dipartimento di Scienze Fisiche,Informatiche e Matematiche,Universitàdegli Studi di Modena e Reggio Emilia,Via Campi 213/a,Modena,41125,Italy [6]Beijing Key Lab of Microstructure and Property of Advanced Materials,Beijing University of Technology,Pingleyuan No.100,Beijing,100024,China [7]Songshan Lake Materials Laboratory,Dongguan,523808,China

出　　处：《Nano Research》2019年第11期2842-2848,共7页纳米研究（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.11934019,61675228,11721404,51761145104,and 11874419);the Strategic Priority Research Program,the Instrument Developing Project and the Interdisciplinary Innovation Team of the Chinese Academy of Sciences(Nos.XDB28000000 and YJKYYQ20180036);the Key RD Program of Guangdong Province(No.2018B030329001);the Key Laboratory Fund(No.614280303051701);We acknowledge financial support from the SUPERTOP project,QUANTERA ERA-NET Cofund in Quantum Technologies.

摘　　要：Crystal-phase low-dimensional structures offer great potential for the implementation of photonic devices of interest for quantum information processing.In this context,unveiling the fundamental parameters of the crystal phase structure is of much relevance for several applications.Here,we report on the anisotropy of the g-factor tensor and diamagnetic coefficient in wurtzite/zincblende(WZ/ZB)crystal-phase quantum dots(QDs)realized in single InP nanowires.The WZ and ZB alternating axial sections in the NWs are identified by high-angle annular dark-field scanning transmission electron microscopy.The electron(hole)g-factor tensor and the exciton diamagnetic coefficients in WZ/ZB crystal-phase QDs are determined through micro-photoluminescence measurements at low temperature(4.2 K)with different magnetic field configurations,and rationalized by invoking the spin-correlated orbital current model.Our work provides key parameters for band gap engineering and spin states control in crystal-phase low-dimensional structures in nanowires.

关 键 词：g-factor tensor diamagnetic coefficient crystal-phase quantum dot InP NWs 

分 类 号：O57[理学—粒子物理与原子核物理]