[1] Univ Kent, Sch Phys Sci, Phys Quantum Mat, Canterbury CT2 7NH, Kent, England
[2] Zhejiang Univ, Ctr Correlated Matter, Hangzhou 310058, Peoples R China
[3] Zhejiang Univ, Dept Phys, Hangzhou 310058, Peoples R China
[4] Zhejiang Univ, Dept Phys, Zhejiang Prov Key Lab Quantum Technol & Device, Hangzhou 310027, Peoples R China
[5] Paul Scherrer Inst, Lab Multiscale Mat Expt, CH-5232 Villigen, Switzerland
[6] Univ Zurich, Phys Inst, Winterthurerstr 190, CH-8057 Zurich, Switzerland
[7] Univ Bristol, HH Wills Phys Lab, Tyndall Ave, Bristol BS8, Avon, England
[8] STFC Rutherford Appleton Lab, ISIS Facil, Harwell Sci & Innovat Campus, Didcot OX11 0QX, Oxon, England
[9] Zhejiang Univ, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China
[10] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China