. , 10τ (τ - ) , , . , . , , , , .
. , , - , . : , .
:
1) . . , , , , ( ), , , , , , , , , , , . 2 . , 2 . , / . .
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2) . , . , . , .
3) . . , , , . , 10τ 5000 1% , (25)τ+τ 6% ( τ , τ ). 2%.
. .
1. Baik S. J., Choi S., Chung U-In, and Moon J. T. Engineering on tunnel barrier and dot surface in Si nanocrystal memories // Solid-State Electron. 2004. Vol. 48. P. 14751481.
2. . ., . . : . . 10 . . III. ( ). .: , 1989.
3. . ., . ., . . . .: , 1982.
4. Büttiker M., Landauer R. Transversal time for tunneling // Phys. Rev. Lett. 1982. Vol. 49, No 23. P. 17391742.
5. . . - - // . 1995. . 29, . 9. .17121726.
6. . ., .. // . 2008. . 13, 2. . 218226.
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9. . . // - - : , '2012, 1012 , , . , 2012. . 147151.
1
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%
% Three graphics (Nuclear Physics Calculations)
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
close all
clear all
%%%%%%%%%%%%%%% 1 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
U1 = 2;
U2 = 1;
points = 30;
E1 = 0: U2/points: 5;
D11 = zeros(1, points);
D12 = zeros(1, points);
% 1
for i = 1: 1: points
D11(i) = calc_D3(U1, U2, E1(i));
end
% 2
for i = 1: 1: points
D12(i) = calc_D1(U1, E1(i))* calc_D1(U2, E1(i));
end
plot(E1(1:points),D11, E1(1:points),D12, '--');
hold on
%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
U1 = 3;
U2 = 1;
points = 30;
E2 = 0: U2/points: 5;
D21 = zeros(1, points);
D22 = zeros(1, points);
% 1
for i = 1: 1: points
D21(i) = calc_D3(U1, U2, E2(i));
end
% 2
for i = 1: 1: points
D22(i) = calc_D1(U1, E2(i))* calc_D1(U2, E2(i));
end
plot(E2(1:points),D21, E2(1:points), D22, '--');
hold on
%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
U1 = 2;
U2 = 0.5;
points = 30;
E3 = 0: U2/points: 5
D31 = zeros(1, points);
D32 = zeros(1, points);
% 1
for i = 1: 1: points
D31(i) = calc_D3(U1, U2, E3(i));
end
% 2
for i = 1: 1: points
D32(i) = calc_D1(U1, E3(i)) * calc_D1(U2, E3(i));
end
plot(E3(1:points),D31, E3(1:points), D32, '--');
hold on
title(' 1');
xlabel('E');
ylabel('D');
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Three graphics (Nuclear Physics Calculations)
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function D = calc_D1(U1,E)
%%
m = 0.19 * 9.11 * 10^(-31);
e = 1.6 * 10^(-19);
h_crossed = 1.054 * 10^(-34);
W = 10^(-9);
beta = ((2 * m *(U1 - E) * e)/(h_crossed^2)) ^ 0.5;
k = ((2 * m * E * e)/(h_crossed^2)) ^ 0.5;
D = (16 * k^4 * beta^4 * (cosh(beta * W))^2 + 4 * k^2 * beta^2 * ((beta^2 - k^2))^2 * (sinh(beta * W))^2)/(((beta^2 - k^2)^2) * (sinh(beta * W)^2) + 4 * k^2 * beta^2 * (cosh(beta * W))^2)^2;
end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Three graphics (Nuclear Physics Calculations)
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function D = calc_D3(U1,U2,E)
%%
m = 0.19 * 9.11 * 10^(-31);
e = 1.6 * 10^(-19);
h_crossed = 1.054 * 10^(-34);
W1 = 10^(-9);
W2 = 10^(-9);
W = W1 + W2;
beta = ((2 * m *(U1 - E) * e)/(h_crossed^2)) ^ 0.5;
k = ((2 * m * E * e)/(h_crossed^2)) ^ 0.5;
if E < U2
gamma = ((2 * m *(U2 - E) * e)/(h_crossed^2))^0.5;
M = beta * (k^2 - gamma^2) * sinh(gamma * W1) * cosh(beta * (W - W1)) + gamma * (k^2 - beta^2) * cosh(gamma * W1) * sinh(beta * (W - W1));
N = 2 * k * beta * gamma * cosh(gamma * W1) * cosh(beta * (W - W1)) + k *(beta^2 + gamma^2) * sinh(gamma * W1) * sinh(beta * (W - W1));
else E > U2
gamma = ((2 * m *(E - U2) * e)/(h_crossed^2)) ^ 0.5;
M = gamma * (k^2 - beta^2) * sinh(beta * (W - W1)) * cos(gamma * W) + beta * (k^2 * gamma^2) * cosh(beta * (W - W1)) * sin(gamma * W1);
N = 2 * k * beta * gamma * cosh(beta * (W - W1)) * cos(gamma * W1) + k * (beta ^ 2 - gamma ^ 2) * sinh(beta * (W - W1)) * sin(gamma * W1);
end
D = (4 * k^2 * beta^2 * gamma^2)/(M^2 + N^2);
end