Submitted on: 18 July 1999.
Revised on: 02 August 1999.
Accepted on: 27 August 1999.
Physical Review X
Submitted on: 11 August 2018.
Revised on: 29 August 2018.
Accepted on: 12 September 2018.
Physical Review X---AMER PHYSICAL SOC
Submitted on: 25 July 2008.
Revised on: 30 August 2008.
Accepted on: 26 September 2008.
Physical Review X
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Submitted on: 17 June 2017.
Revised on: 01 July 2017.
Accepted on: 13 July 2017.
Physical Review X---AMER PHYSICAL SOC
http://reply.papertrans.cn/3/247/24640/24640-16.png
Submitted on: 15 July 2020.
Revised on: 15 August 2020.
Accepted on: 29 August 2020.
Physical Review X---AMER PHYSICAL SOC
http://reply.papertrans.cn/3/247/24640/24640-18.png
http://reply.papertrans.cn/3/247/24640/24640-19.png
Submitted on: 24 August 2017.
Revised on: 19 September 2017.
Accepted on: 25 September 2017.
Physical Review X---AMER PHYSICAL SOC