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Physical Review B Physical review / B, 87 87 (2013 2013) 12 12, S. 121111 121111
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Physical Review B Physical review / B, 87 87 (2013 2013) 20 20, S. 205103 205103
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Physical Review B Physical review / B, 83 83 (2011 2011) 20 20, S. 205129 205129
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Physical Review B Physical review / B, 84 84 (2011 2011) 11 11, S. 115426 115426
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