20
R
= − −V Q a Q Q a Q Q1
2,NL R
2R2
12 IR R2
21 IR2
R
a Q Q12 IR R2
a Q Q21 IR2
R R
*IR
VR R
Q Q Q a Q Q f t¨ 2 ˙ 2 ,IR IR IR IR2
IR 21 IR R
Q Q Q a Q¨ 2 ˙ .R R R R2
R 21 IR2
R a Q ,21 IR2
R
R
2.1. Nonlinear lattice dynamics
μ
R
IR2
R
79 2016
μ
79 2016
( / )/∆ I I Q0 R
R
2.2. Driving insulator-metal transitions
�
μ
79 2016
B1u2
Ag
2.3. Melting electronic and magnetic order
μ
μ
∆ = −RR R R R/ thermal 300 90 K / 90 K0
79 2016
μμ μ
79 2016
⊗ =B B A2u 2u g
μ
79 2016
3.1. Light-induced superconductivity in single-layer cuprates
μ
μ
79 2016
α
μ
σ ωτ σ ωτω
ωσ ω τ,2
τ
α
79 2016
σ ω2
q
μ
ωσ ω τμ
ω
σ ω
79 2016
3.2. Light-induced superconductivity and nonlinear lattice dynamics in bi-layer YBa Cu O
μ
ε
⊗B B1u 1u
79 2016
μ
μ
79 2016
3.3. Coherent modulation of the YBa2Cu3O6.55 atomic structure
μ
79 2016
79 2016
μ
μ
79 2016
μ
θ θ
χ
79 2016
3
61
35
94
102
65
55
7
59
58
169
422
79 2016
4
100
70
100
53
388
386
78
280
52
449
89
76
77
83
59
91
92
71
76
101
76
63
44
75
76
89
99
84
12
61
103
106
88
40
375
38
83
159
44
88
46
79
79 2016
83
85
426
73
104
331
88
79
69
68
50
86
283
99
99
112
1
84
39
85
89
126
δ
106
13
516
4
91
90
91
δ 69
28
49
91
105
83
107
4
9
81
79 2016
72
77
62
108
22
51
11
23
14
88
79
2
—27
79 2016
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