9, 10) 11, 12) 13, 14) 15) QED 16) , 19, 20) 21, 22) tight-binding Chern Hofstadter 23) Haldane 24) tight-binding Chern 25, 26) Chern 3 18, 1

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1 March 2015 A B A B 1 1) 1990 Hubbard Mielke 2, 3, 4) 1 8) 1 Hubbard 5) 6) 7) 1

2 9, 10) 11, 12) 13, 14) 15) QED 16) , 19, 20) 21, 22) tight-binding Chern Hofstadter 23) Haldane 24) tight-binding Chern 25, 26) Chern 3 18, 19, 20) Chern 2 Nielsen- Dagotto 17) 3 Chern Berry Chern Berry Berry 27) 2

3 Chern 28) Organometallic Framework 29) 30, 31) Chern 32, 33) tight-binding 4 34, 35) 36) 2 Tight-binding tight-binding 4 3

4 2.1 tight-binding Λ i = 1, 2,..., N i c i c i [c i, c j ] ± = [c i, c j ] ± = 0, [c i, c j ] ± = δ i,j (2.1) [A, B] ± = AB ± BA +/ / 5 tight-binding N H = t i,j c i c j (2.2) i,j=1 t i,j i = j i j ( ( 1) ) T = (t i,j ) i,j=1,...,n N 2.2 H T T k (= 1, 2,..., N) ε k φ (k) = (φ (k) 1, φ (k) 2,..., φ (k) N )T 6 N j=1 t i,j φ (k) j = ε k φ (k) i (2.3) 5 6 4

5 i φ (k) a k = N i=1 φ (k) i c i (2.4) [AB, C] = A[B, C] ± [A, C] ± B [H, a k ] = ε k a k (2.5) 0 Ha k 0 = [H, a k ] 0 = ε k a k 0 (2.6) a k 0 H ε k i c i 0 = 0 (2.6) a k ε k H (2.5) n 1, n 2,..., n N = (a 1) n 1 (a 2) (n 2) (a N )n N 0 (2.7) n k 1 (c i )2 = 0 Pauli H a k ( N ) H n 1, n 2,..., n N = n k ε k n 1, n 2,..., n N (2.8) k=1 H E = k n kε k k n k tight-binding 2.3 ε k T Λ 5

6 M N M/N (> 0) T t i,j 7 t i,j Λ G = (V, E) V E i, j V (i, j) e E e = (i, j) e i, j i j G p = (i 1, e 1, i 2, e 2,..., i k, e k, i k+1 ) (2.9) e l = (i l, i l+1 ) (l = 1, 2,..., k) p i 1 i k+1 k G V A, B A B G bipartite A, B A B bipartite 1(a) A B N M = (m i,j ) i,j=1,...,n N V i j m i,j e = (i, j) G = (V, E) M T tight-binding Λ T 0 t 0 t t t 0 t 0 0 T = 0 t 0 t t t 0 t 0 0 t 0 t 0 0 (2.10) 7 i j t i,j = 0 6

7 t, t T 1(a) T 2 1(b) 8 1(b) T bipartite T (t i,i = 0) T 2 G 1 = (A, E 1 ) G 2 = (B, E 2 ) T tight-binding T ε k T tight-binding 3 bipartite A B Sutherland 37) 3.1 Bipartite T G bipartite t i,i = 0 (i = 1, 2,..., N) T ε ε G i = 1, 2,..., A A i = A + 1,..., N B 9 T A B T AB T BA = (T AB ) 8 t, t (t /t = 1, 2) 9 S S 7

8 T = O T BA T AB O (3.1) O 0 T ε φ = φ A φ = φ A T ϵ φ B φ B T A B {}}{{}}{ C = diag( 1,..., 1, 1,..., 1) (3.2) CTC = T ε 0 ε ε = 0 φ φ = Cφ N ε = 0 N (N = 5) (2.10) 1(c) t /t ε = 0 T A B A B > A T 2 = T ABT BA O O (3.3) T BA T AB 1(b) A B S A = T AB T BA S B = T BA T AB T 2 S A, S B 1. S A, S B 0 2. S A S B 8

9 3. S B ( B A ) T T 2 3. T ( B A ) 1(a) 3 2 = 1 t, t S B = (T AB ) T AB B ψ ψ, S B ψ = T AB ψ, T AB ψ = T AB ψ S A 2. ψ S B λ > 0 T BA T AB ψ = λψ T AB S A ψ = λ ψ ψ = TAB ψ 11 S A λ S B S A 3. ( ) S B ψ 0 ψ 0, S B ψ 0 = T AB ψ 0 2 = 0 T AB ψ 0 = 0 T AB A B ( B A ) S B T B T T = T AA T BA T AB O (3.4) (T AA A ) ( B A ) B A bipartite 2(a) Lieb 38) N c B A = N c T 1/3 3(a) ( B A = N c ) 40) 4(a) Lieb ( B A = N c ) 10 d u, v u, v = d i=1 u i v i 11 ψ 0 ψ = 0 0 = ψ 2 = S B ψ, ψ = λ ψ, ψ = 0 9

10 t i,j ε = 0 t i,j T 39) t i,j 41) ε = bipartite bipartite Mielke 42) G = (V, E) V A E B G = (Ṽ, Ẽ) 12 G G Lieb ( 2(a)) G G ( 3(a)) G G bipartite G i, j t i,j 0 i, j t i,j = 0 T (3.1) S B = T BA T AB S B G L(G) 2 G L(G) 3 G L(G) S A = T AB T BA G S A, S B 2. G S A tight-binding L(G) S B ε = 0 ( ) tight-binding 3 (b) (c) 2 (b) (c) 12 Ising decoration-iteration transformation 43) 10

11 4(a) bipartite i, j t i,j = t i, j t i,j = 0 T S A S B 3) ε = t 2 S A, S B 2., 3. ε = 0, t 2 4(c) bipartite bipartite Lieb Mielke 44) 4 t i,j 4.1 5(a) 3 11

12 t ϕ 1, ϕ 2 0 te iϕ 1 t t te iϕ 2 te iϕ 1 0 t 0 0 T = t t (4.1) t t te iϕ t 0 ϕ 1, ϕ 2 ϕ 1, ϕ 2 ε = ±t 5 (c) T ϕ 1, ϕ 2 5(b) p q ϕ 1, ϕ 2 (p q 1) idle state 45) idle state 5(a) 2, 3 φ 1 = (0, 1, 1, 0, 0) T (4.1) T (2.3) ε k = t φ 1 i = 1 4, 5 φ 2 = (0, 0, 0, 1, 1) T ε k = t (2.3) i = 1 φ 1 φ 2 T i = 1 (4.1) φ = (1 + e iϕ 2 )φ 1 (1 + e iϕ 1 )φ 2 (4.2) i = 1 i (4.1) 13 ε k = t φ 3 = (0, 1, 1, 0, 0) T φ 4 = (0, 0, 0, 1, 1) T 5(b) (p 1)- (q 1)- 13 ϕ 1 = π ϕ 2 = π φ 1 φ 2 idle state 12

13 n ( ) mπ ε m (n) = 2t cos, n + 1 m = 1, 2,..., n (4.3) p q (2.3) idle state idle state ( 5(d)) 4.2 6(a) 5 i, j t i,j = t i, j t i,j = 0 T x, y T (4.1) ϕ 1 k x, ϕ 2 k y idle state ε = ±t 6(a) 7(c) ε = 0, ± 2t Lieb 7 14 α-graphyne 46, 47) 0 ansatz 14 40) 8) 13

14 T tight-binding 6(a) bipartite 6(b) tight-binding 15 tight-binding 48, 49) tight-binding 4.3 (4.2) ϕ 1 k x, ϕ 2 k y k a (k) = (1 + e ik y ){c 2(k) + c 3(k)} (1 + e ik x ){c 4(k) + c 5(k)} (4.4) Z(k) = cos k x + cos k y ã (k) = a (k)/z(k) [ã(k), ã (k )] ± = δ k,k ã (k) ε = t Wannier a (k) R, x, y e x, e y a (k) a (R) = c 2(R) + c 3(R) + c 2(R + e y ) + c 3(R + e y ) {c 4(R) + c 5(R) + c 4(R + e x ) + c 5(R + e x )} (4.5) c a(r) R a 6(a) 15 6(b) or 14

15 t i,j Hubbard 5 tight-binding t i,j bipartite 50) 51) Atiyah-Singer Witten 52) (3.1) T AB ( )=(Witten ) ADHM 53) 54, 55)

16 k 56, 57) 58) Hofstadter 25, 59) Bogoliubov-de Gennes tight binding 60) 61, 62) [1] 45, No. 11 (2010). [2] A. Mielke: J. Phys. A 24 (1991) [3] H. Tasaki: Phys. Rev. Lett. 69 (1992) [4] A. Mielke and H. Tasaki: Commun. Math. Phys. 158 (1993) 341. [5] H. Tasaki: Phys. Rev. Lett. 75 (1995) [6] : 31, No. 3 (1996) [7]

17 [8], (, 1998). [9] J. Schulenburg, A. Honecker, J. Schnack, J. Richter, and H.-J. Schmidt: Phys. Rev. Lett. 88 (2002) [10] M. E. Zhitomirsky and H. Tsunetsugu: Phys. Rev. B 70 (2004) (R). [11] C. Wu, D. Bergman, L. Balents, and S. Das Sarma: Phys. Rev. Lett. 99 (2007) [12] C. Wu and S. Das Sarma: Phys. Rev. B 77 (2008) [13] R. Shen, L. B. Shao, Baigeng Wang, and D. Y. Xing: Phys. Rev. B 81 (2010) (R). [14] V. Apaja, M. Hyrkäs, and M. Manninen: Phys. Rev. A 82 (2010) (R). [15] S. Endo, T. Oka, and H. Aoki: Phys. Rev. B 81 (2010) [16] J. Koch, A. A. Houck, K. Le Hur, and S. M. Girvin: Phys. Rev. A 82 (2010) [17] E. Dagotto, E. Fradkin, and A. Moreo: Phys. Lett. B 172 (1986) 383. [18] E. Tang, J-W. Mei, and X-G. Wen: Phys. Rev. Lett. 106 (2011) [19] K. Sun, Z-C. Gu, H. Katsura, and S. Das Sarma: Phys. Rev. Lett. 106 (2011) [20] T. Neupert, L. Santos, C. Chamon, and C. Mudry: Phys. Rev. Lett. 106 (2011) [21], [22], III (, 1999). [23] D. R. Hofstadter: Phys. Rev. B 14 (1976) [24] F. D. M. Haldane: Phys. Rev. Lett. 61 (1988) [25] H. Katsura, I. Maruyama, A. Tanaka, and H. Tasaki: Europhys. Lett. 91 (2010) [26] D. Green, L. Santos, and C. Chamon: Phys. Rev. B 82 (2010) [27] L. Chen, T. Mazaheri, A. Seidel, and X. Tang: J. Phys. A: Math. Theor. 47 (2014)

18 [28] D. Xiao, W. Zhu, Y. Ran, N. Nagaosa, and S. Okamoto: Nat. Commun. 2 (2011) 596. [29] Z. Liu, Z-F. Wang, J-W. Mei, Y-S. Wu, and F. Liu: Phys. Rev. Lett. 110 (2013) [30] N. Y. Yao, A. V. Gorshkov, C. R. Laumann, A. M. Läuchli, J. Ye, and M. D. Lukin: Phys. Rev. Lett. 110 (2013) [31] N. R. Cooper and J. Dalibard: Phys. Rev. Lett. 110 (2013) [32] S. A. Parameswaran, R. Roy, and S. L. Sondhi: Comptes Rendus Physique 14 (2013) 816 (2013). [arxiv: ] [33] E. J. Bergholtz and Z. Liu: Int. J. Mod. Phys. B 27 (2013) [34] D. Weaire and M. F. Thorpe: Phys. Rev. B 4 (1971) [35] J. P. Straley: Phys. Rev. B 6 (1972) [36] M. Kohmoto and B. Sutherland: Phys. Rev. Lett. 56 (1986) [37] B. Sutherland: Phys. Rev. B 34 (1986) [38] E. H. Lieb: Phys. Rev. Lett. 62 (1989) [39] M. Inui, S. A. Trugman, and E. Abrahams: Phys. Rev. B 49 (1994) [40] N. Shima and H. Aoki: Phys. Rev. Lett. 71 (1993) [41] H. Aoki, M. Ando, and H. Matsumura: Phys. Rev. B 54 (1996) 17296(R). [42] A. Mielke: J. Phys. A 24 (1991) L73. [43] I. Syozi: Transformation of Ising Models, in Phase Transitions and Critical Phenomena, vol. 1, edited by Domb & Green (Academic Press, 1972). [44] C. Weeks and M. Franz: Phys. Rev. B 82 (2010) [45] Y. Avishai and J. M. Luck: J. Phys. A 42 (2009) [46] D. Malko, C. Neiss, F. Viñes, and A. Görling: Phys. Rev. Lett. 108 (2012)

19 [47] B. G. Kim and H. J. Choi: Phys. Rev. B 86(2012) [48] S. Miyahara, K. Kubo, H. Ono, Y. Shimomura, and N. Furukawa: J. Phys. Soc. Jpn. 74 (2005) (2005). [49] K. Kubo, C. Hotta, S. Miyahara, and N. Furukawa: Physica B 378 (2006) 273. [50] M. Imada and M. Kohno: Phys. Rev. Lett. 84 (2000) 143. [51],,, : 38 (2003) 415. [52] E.Witten: Nucl. Phys. B 202 (1982) 253. [53] : 106 (2002) 1. [54] P. Fendley and K. Schoutens: Phys. Rev. Lett. 95 (2005) [55] L. Huijse, J. Halverson, P. Fendley, and K. Schoutens: Phys. Rev. Lett. 101 (2008) [56] M. Fujita, K. Wakabayashi, K. Nakada, and K. Kusakabe: J. Phys. Soc. Jpn. 65 (1996) [57] S. Ryu and Y. Hatsugai: Phys. Rev. Lett. 89 (2002) [58] A. P. Schnyder and S. Ryu: Phys. Rev. B 84 (2011) (R). [59] T. Scaffidi and S. H. Simon: Phys. Rev. B 90 (2014) [60] R. R. Biswas: Phys. Rev. Lett. 111 (2013) (2013). [61] Z. Liu, F. Liu, and Y-S. Wu: Chin. Phys. B 23 (2014) [arxiv: ] [62] O. Derzhko, J. Richter, and M. Maksymenko: preprint (2015). [arxiv: ] 19

20 1: (a) bipartite (2.10) T 1 5 t t (b) T 2 (c) T t t = 1 2: (a) Lieb (b) S A (c) S B (a) t = 1 3: (a) (b) S A (c) S B (a) t = 1 4: (a) Lieb (b) S A (c) S B (a) t = 1 5: (a) (b) idle state( ) (c) T 0 ϕ 1, ϕ 2 2π t = 1 (d) idle state 6: (a) 5 (a) (4.5) (b) (a) T 20

21 7: (a) (b) (c) (4.3) 21

22 図 1 (a) 4 3 (b) t (c) 4 2 e t

23 図 2 (a) (b) (c) ε ε ε k y k x k y k x k y k x

24 図 3 (a) (b) (c) ε ε ε k y k x k y k x k y k x

25 図 4 (a) (b) (c) ε ε ε k y k x k y k x k y k x

26 図 5 (a) (b) φ 1 φ 2 φ 1 φ (c) (d) ε φ 1 φ 2

27 図 6 (a) (b) y x

28 図 7 (a) (b) (c) ε ε ε k y k x ky k x ky k x

(extended state) L (2 L 1, O(1), d O(V), V = L d V V e 2 /h 1980 Klitzing

(extended state) L (2 L 1, O(1), d O(V), V = L d V V e 2 /h 1980 Klitzing 1 2 2.1 [1] [2] 2.1 STM [3, 4, 5, 6] 2.1: 2 ( 3 [1] ) [7, 8] [9]( 2.2) 2 2 2.1.1 (extended state) L (2 L 1, O(1), d O(V), V = L d V V 2.1.2 1985 2 e 2 /h 1980 Klitzing 2.1. 3 [7, 8] 2.2 [10] [8] 2.2: (a)

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