单晶(薄膜或可解理的块材)
Single crystal(Thin film or cleavable block)
•原则上要导电(至少能够将样品表面接地)
Should be conductivity(At least surface can be grounded)
•尺寸:0.1mm*0.1mm以上(通常建议不低于1mm*1mm)
Size:>0.1*0.1mm (>1*1mm suggested)
•可通过解理/退火获得新鲜表面或通过超高真空传输保持洁净的表面
Clean surface can be obtained by cleave/anneal/UHV transfer